Klixon-aircaft-cib-html.html

Sensata is the leading supplier of circuit breakers to

the

global aircraft industry and has established the
industry standard for quality, reliability, and

performance. Sensata has pioneered virtually all

of the

aircraft circuit breakers styles used in today’s

aircraft. Sensata’s complete line of circuit breakers

offers

a broad selection of types, features and

design options.

• Single pole or three pole versions
• Ratings from

⁄

to 100 amps

• Trip free design
• Temperature or non-temperature compensated

Applications

Sensata’s broad circuit breaker product line is ideal for
those rugged applications that require a high level of
reliability and performance as well as excellent
vibration and shock resistance including:
• Power distribution systems on commercial and

military aircraft

• Ground support equipment
• Avionics
• Missile launcher systems
• Aircraft simulators
• Power distribution systems on military vehicles

Overview

Index

Sensata Number
Guide ....................................................................
2TC, 3TC ..............................................................
6TC, 9TC...............................................................
2TC49 ...................................................................
5TC .......................................................................
6752 ......................................................................
6752-100 ...............................................................
3TC7......................................................................
7274-2,-4,-11,-69 ..................................................
7277 ......................................................................
20TC .....................................................................
7270-1, 7271-8 .....................................................
3SB2, 3SB4............................................................
Arc Fault ..............................................................
Cross Reference ...................................................
Glossary ................................................................

Page

2, 3
4, 5
6, 7
8, 9

10, 11
12, 13
14, 15
16, 17
18, 19

20
21

22, 23
24, 25
26, 27

28
29

Sensata maintains a complete line of MS and customer
approvals on most major aircrafts worldwide. Due to
space limitations, these configurations cannot all be
shown.
7276 style aircraft circuit breaker is not shown in the
catalog.

• Excellent vibration and shock resistance
• Qualified to global commercial and

military standards

• Optional auxiliary switch
• Thermal and magnetic sensing
• Push button, toggle or rocker switch
• Long push button
• Various terminal configurations
• MS and commercial configuration
• Manual reset
• 28VDC or 120VAC, 400 Hz

For more information contact our product manager:

Tel: (508) 236-3573
For more information on circuit breakers
contact:Tel: (508) 236-3536

Website address: www.sensata.com

Condensed Aircraft Circuit Breaker Guide

This guide gives a brief description of most circuit breakers manufactured by Sensata Technologies. For more information,

please consult the appropriate section of this catalog.

CIRCUIT BREAKER TYPE NUMBER

TYPE

APPRO

VAL

ACTU

ATING

RESET

MEANS

MANUAL TRIP

INDIC

ATING

TING

AMPS

MAJOR DIMENSIONS IN

INCHES

APPROX. L

APPROX. W

GRAMS

APPROX. 200% TIME

SECONDS

TIME

TRIP

TWICE

ATED

CURRENT

2TC

3TC

5TC

6TC

9TC
2TC49

3TC7

6752-12

6752-100

6752-305
7274

7277

7270

7271
20TC2

3SB

Aircraft

Simulator

MS 3320

MS 14105

––

MS 14154

MS 14153
M5809/1

MS 25244

MS 24571

MS 25361

MS 26574

MS 22073

––

MS 24509

MS 24510

––

Button

Toggle

Button
Rocker

Button

Yes

1 - 35

15 - 35

20 - 50

2 - 25

1, 15 - 35
2.5 - 15

5 - 35

2.5 - 50

50 - 100

2.5 - 90
1/2 - 20

1/2 - 20

3 - 35

––

.75 x .56 x 1.2

1.10 x .75 x 1.2

1.65 x .77 x 1.92

.75 x 1.78 x 1.2

1.10 x 2.35 x 1.2
1.21 x .75 x .56

1.1 x .75 x 1.49

2.2 x .75 x 3.3

2.2 x 2.25 x 3.3
.750 x .562 x 2.2

.750 x .562 x 2.2

1.37 x .75 x 2.25

1.37 x .75 x 2.00
2 x .750 x 2

.750 x .562 x 2.2

25.0

36.0

57.5 (std.)

59.4 (aux.)

65.0

110.0

25.0

38.9

91.0

292.0

28.0

32.0
25.0

39.0

30.0

10
10

50
50

––

MIL Approved Aircraft Circuit Breakers

*Note: For cross reference information, refer to page 28.

MS Number

MS 3320
MS 3320L
MS 3320V
MS 14105
MS 14105L
MS 14153
MS 14154
MS 14154L

Sensata Number

2TC2
2TC27
2TC63
3TC2
3TC27
9TC2
6TC2
6TC37

Page

4, 5
4, 5
4, 5
4, 5
4. 5
6, 7
6, 7
6, 7

MS Number

MS 14154V
MS 5809/1
MS 24571
MS 24571V
MS 25361
MS 25361V
MS 22073
MS 22073V

Sensata Number

6TC63
2TC49
6752-12
6752-12
6752-100
6752-102
7274-11
7274-69

Page

6, 7
8, 9
12, 13
12, 13
14, 15
14, 15
18, 19
18, 19

MS Number

MS 26574
MS 26574A
MS 26574L
MS 24509A
MS 24509B
MS 24510A
MS 24510B
MS 25244

Sensata Number

7274-2
7274-4
7274-70
7270-1
7270-7
7271-8
7271-3
3TC7

Page

18, 19
18, 19
18, 19
22, 23
22, 23
22, 23
22, 23
16, 17

FAU

INTERRUPTING CA

PACITY

AMPS

LTS

CYCLES

REMARKS

TYPICAL APPLICATIONS

6000 @ 28 VDC

2500 @ 120 VAC, 400 Hz

6000 @ 28 VDC

2000 @ 120 VAC, 400 Hz
4000 @ 28 VDC

2000 @ 115 VAC, 400 Hz
2000 @ 120 VAC, 400 Hz

2000 @ 120 VAC, 400 Hz
6000 @ 28 VDC

2500 @ 120 VAC, 400 Hz
6000 @ 30 VDC

3500 @ 120 VAC, 400 Hz

6000 @ 30 VDC

120 VAC, 400 Hz

2000 @ 28 VDC

500 @ 125 VAC, 400 Hz
2000 @ 28 VDC

500 @ 120 VAC, 400 Hz
4000 @ 30 VDC

3500 @ 120 VAC, 400 Hz
2000 @ 30 VDC

1000 @ 120 VAC, 400 Hz

––

Subminiature,

ambient compensated 1 pole

auxiliary switch available

Ambient compensated

Subminiature,

ambient compensated, 3 pole
Dual Safety 2TC

Lightweight, high performance,

non-ambient temperature

compensated
1 Pole – 6752-12

1 Pole – 6752-100

3 Pole – 6752-305
Quick acting, subminiature

auxiliary switch available
Wide calibration

version of 7274
Toggle or push button

Rocker switch type

Push button

Aircraft power distribution

Aircraft, avionics, and electrical systems

Aircraft power distribution

Aircraft, avionics, and electrical systems

Aircraft power distribution

ground support

Aircraft power distribution,

Avionics, ground support, missile systems
Protection of wire, motors, solenoids,

transformers in electronics
Aircraft power distribution

Combination circuit switching & protection

light aircraft, electronics, vehicles
Commercial and military simulators

Condensed Aircraft Circuit Breaker Guide

CIRCUIT BREAKER TYPE NUMBER

2TC

3TC

5TC

6TC

9TC
2TC49

3TC7

6752-12

6752-100

6752-305
7274

7277

7270

7271
20TC2

3SB

For more information contact our product manager:

Tel: (508) 236-3573

For more information on circuit breakers contact:

Tel: (508) 236-3536

Website address: www.sensata.com

*Note: For FAA/PMA approved devices, go to www.klixon.com

Single Phase TC Series Circuit Breakers

Miniature Ambient Compensated

Overview

Klixon® single-phase TC devices
are the smallest, lightest aircraft
circuit breakers available today.
They represent “state-of-the-art”
protection for today’s aerospace
power systems. Their light weight
and small size make them
especially well suited for aircraft,
avionics and electronic systems.

The Klixon trademark has set the
standard for aerospace circuit
breakers. Despite the small size,
the TC series offers the endurance
and reliability required by
exacting military specifications,
and are available in standard
current ratings from 1 – 35
amperes.

Coordination

The 2, 3, 6 and 9TC breaker rat-
ings are coordinated so any rating
will trip before another circuit
breaker, twice its rating, in the
event of a fault of up to 6000
amps let-thru current. This
results in improved overall equip-
ment performance, since only the
smallest faulted circuit is inter-
rupted, while larger circuits
remain operational (see pages 6
and 7 for 6/9TC details).

Ambient Temperature

Compensation

Ambient  compensated circuit
breakers permit system designers
to specify smaller gauge wire
where the circuit breaker and
wiring are exposed to different
ambient temperatures. They are
especially suited for applications
where the ambient temperature
exceeds the 160oF maximum of
non-ambient compensated thermal
circuit breakers. The TC series
may be applied where operating
temperatures are as high as 250oF
(121oC), with no derating  of the
circuit breaker. This eliminates the
need for cooling air and allows
substantial weight, space and
cost savings.

Options*

•

Longer push buttons

•

High vibration

•

Random vibration

•

Metric mounting thread

•

Metric terminal thread

•

Dust boot†

•

Auxiliary switch - male and

female contacts available

•

Terminal barriers

•

Plug-in terminals

Trip Free

The complete line of TC series
circuit breakers is trip free. The
circuit breaker cannot be main-
tained closed during an overload
even with the actuator button
held closed.

High Short Circuit Capacity

For its miniature size, the 2/3TC
series offers unusually high
current interrupting capacity.
Overloads up to 6000 amps at
28 VDC or 2000-3500 amps at
120 VAC, 400 Hz can be safely
interrupted without affecting
calibration or operating
performance in the standard
2/3TC series.

Qualifications

MS3320 - 2TC2
MS3320L - 2TC27
MS3320V - 2TC63
MS14105 - 3TC2
MS14105L - 3TC27
European standards
SAE standards
All U.S. aircraft OEM’s
Most European aircraft OEM’s

* Contact factory for details

† Part Number 14500-1 Fits 15/32 Bushing

Part Number 14500-5 Fits 7/16 Bushing

2TC14

2TC66

3TC14

Features

• Miniature size
• Light weight
• Trip free
• Mil-qualification
• Current rating 1-35 amperes
• Coordinated ratings
• High vibration resistance
• High interrupt capacity

TEMP

+25

-54

+121

MIN ULT

TRIP

115%
115%

85%

MAX ULT

TRIP

138%
165%
145%

TRIP TIME - SECONDS

200%

4-16
7-35
2-13

500%
.4-1.6
.6-3.0

.25-1.0

1000%
.10-.40
.15-.70
.06-.25

TEMP

+25

-54

+121

MIN ULT

TRIP

115%
115%

85%

MAX ULT

TRIP

138%
165%
145%

TRIP TIME - SECONDS

200%

4-20
6-35
2-15

500%

.40-1.7
.55-3.0
.25-1.0

1000%
.10-.40
.15-.70
.06-.25

Vibration*....................... 10 G’s minimum, 50 - 500 Hz

Mechanical Shock.......... 50 G’s

Acceleration................... 10 G’s

Weight............................. 2TC14 - 24 gm max.

3TC14 - 36 gm max.

Interrupt Current

1-20 amps: 6000 amps at 28 VDC

25 amps: 1625 amps at 28 VDC

1-15 amps: 2500 amps at 120 VAC, 400 Hz

20 amps: 2000 amps at 120 VAC, 400 Hz

25 amps: 1800 amps at 120 VAC, 400 Hz

Endurance

2500 cycles 120 VAC, 400 Hz Inductive

5000 cycles 120 VAC, 400 Hz Resistive

2500 cycles 30 VDC Inductive

5000 cycles 30 VDC Resistive

10,000 cycles Mechanical, no load

2TC14-1

2TC14-2

⁄

2TC14-3

2TC14-4

2TC14-5

2TC14-7

⁄

2TC14-10

2TC14-15

2TC14-20

2TC14-25

1.10

0.70

0.50

0.40

0.45

0.35

0.30

0.28

0.25

0.20

3TC14-15

3TC14-20

3TC14-25

3TC14-30

3TC14-35

Sensata

Number

Voltage

Drop (max.)**

Sensata

Number

Voltage

Drop (max.)**

* Other vibration levels available. Contact factory for details.

**Max. voltage drop at nominal rated current.

0.25

Characteristics

2TC14

3TC14

.750

.078

.375 OF

MOUNTING KEY

5 AMP

RATING

SHOWN

.031

.562

MAX.

.047

.704

1.030

MAX. 1.218

15/32-32

UNS-2A

.250

Panel Mounting

.125±.005 Dia.

.375

±.005

.485

±.005 Dia.

#8-32 UNC

Calibration: 1-25 amps

Calibration: 15-35 amps

Panel Mounting

.125±.005 Dia.

.375

±.005

.485

±.005 Dia.

.047

.704

1.030

MAX. 1.218

15/32-32

UNS-2A

.250

#8-32 UNC

.078

.031

1.100

MAX.

.781

MAX.

Approximate Time-Current Curves - 2TC and 3TC Circuit Breakers

1000

100

Rated

Current

0.01 0.1 1 10 100 1000

Trip Time in Seconds

165%
138%
115%
85%

-54oC MAXIMUM TRIP CURVE

+25oC TRIP BAND

+121oC MINIMUM TRIP CURVE

.375 OF

MOUNTING KEY

2TC14 / 3TC14

35 AMP

RATING

SHOWN

Three Phase TC Series Circuit Breakers

Miniature Ambient Compensated

Features

•

One phase trips all

•

Protective shields between each

phase’s terminals

•

Pads increase mounting stability

•

Also includes identical features

as 2TC and 3TC

Overview

The 6TC and 9TC circuit breakers
provide ambient compensated
circuit protection in a lightweight,
subminiature package size. The
three phase design integrates
each individual phase to provide
overcurrent protection in the
event of simultaneous or
unbalanced overloads, including
short circuit conditions.

Coordination

The 6TC and 9TC are compatible
with their single phase 2TC and
3TC cousins. The 6TC and 9TC
are available in ratings from 1-35
amps, with military and various
commercial approvals on most
styles.

Ambient Temperature

Compensation

The 6TC and 9TC are ambient
compensated circuit breakers. This
allows usage of smaller gauge wire.

The 6TC and 9TC can operate
over a temperature range of
-54oC to 121oC, however, care
should be taken to understand the
specification limits at elevated
ambient temperatures.

Options*

•

Longer push buttons

•

High vibration

•

Metric mounting thread

•

Metric terminal thread

•

Dust boot†

•

Auxiliary switch device available††

* Contact factory for details
† Part Number 14500-1 fits 15/32 bushing

Part Number 14500-5 fits 7/16 bushing

†† 6TC Device

Trip Free

The complete line of TC series
circuit breakers is trip free. The
circuit breaker cannot be main-
tained closed during an overload,
even with the actuator button
held closed.

High Short Circuit Capacity

For its miniature size, the 6/9TC
series offers unusually high
current interrupting capacity.
Overloads up to 2000 amps at
120 VAC, 400 Hz can be safely
interrupted without affecting
calibration or operating
performance in the standard
6/9TC series.

Qualifications

MS14154 6TC2
MS14154L 6TC37
MS14154V 6TC63
MS14153 9TC2
European standards
SAE standards
All U.S. aircraft OEM’s
Most European aircraft OEM’s

6TC

9TC

TEMP

+25

-54

+90

+121

MIN ULT

TRIP

110%
110%
100%

90%

MAX ULT

TRIP

145%
165%
145%
145%

TRIP TIME - SECONDS

200%

4-20
6-40
3-20
3-20

500%

.40-2.0
.55-3.5
.33-1.7
.33-1.7

1000%
.10-.53
.15-.80
.08-.40

.08-40

Characteristics

9TC14

6TC14

Panel Mounting

.125±.005 Dia.

.375

±.005

.485

±.005 Dia.

.485

±.005 Dia.

.375

±.005

#8-32 UNC

.250

.047

#8-32 UNC

1.840

.624

1.030

MAX

1.218

.500

.765

1.100

MAX.

.802

2.415

1.100

MAX.

15/32 .32

UNS 2A

15/32 .32

UNS 2A

1.350

.047

.765

1.030

MAX.

1.218

TEMP

+25

-54

+90

+121

MIN ULT

TRIP

110%
110%
100%

90%

MAX ULT

TRIP

145%
165%
145%
145%

TRIP TIME - SECONDS

200%

4-20
6-40
3-20
3-20

500%

.40-2.0
.55-3.5
.33-1.7
.33-1.7

1000%
.10-.53
.15-.80
.08-.40

.08-40

† Single phase max. ult. trip values apply with other two phases carrying 100% of

rated current.

† Single phase max. ult. trip values apply with other two phases carrying 100% of

rated current.

Vibration* ................................

Mechanical Shock ...................

Acceleration ............................

Weight .....................................

10 G’s minimum, 50-500 Hz

50 G’s

10 G’s

6TC14 - 65 gm max.

9TC14 - 110 gm max.

Interrupt Current

Endurance

Sensata

Number

6TC14-2

⁄

6TC14-3

6TC14-4

6TC14-5

6TC14-7

⁄

6TC14-10

6TC14-15

6TC14-20

Voltage Drop

(max.)**

1.10

0.25

Sensata

Number

9TC14-1

9TC14-15

9TC14-20

9TC14-25

9TC14-30

9TC14-35

Voltage Drop

(max.)

0.70

0.50

0.40

0.37

0.35

.192

.176

2-20 amps: 2000 amps at 120 VAC, 400 Hz

1, 15-35 amps: 2000 amps at 120 VAC, 400 Hz

2500 cycles ................................... 120 VAC, 400 Hz Inductive

5000 cycles ................................... 120 VAC, 400 Hz Resistive

5000 cycles ................................... Mechanical, no load

* Other vibration levels available. Contact factory for details.

** Max voltage drop at nominal rated current.

(25 amp 6TC pending qualification.)

Approximate Time-Current Curves - 6TC and 9TC Circuit Breakers

-54oC MAXIMUM TRIP CURVE

+25oC TRIP BAND

+90oC MINIMUM TRIP CURVE

1000

100

.01 0.1 1.0 10 100 1000

Trip Time in Seconds

Rated

Current

165%

145%

110%

100%

6/9TC

5 AMP RATING SHOWN

35 AMP RATING SHOWN

2TC49 Series

“Dual Safety™” Circuit Breakers

Features

Overview

•

Extension of 2TC series

•

Redundant protection in hard fault

catastrophic conditions

•

Separable link feature

•

Case color distinguishes 2TC49 from 2TC series

•

Uses less space and weighs less than other

circuit breaker packages

•

Rating 2

⁄

-15 amps

The 2TC49 “Dual Safety™” circuit
breaker represents a refinement
in electrical control and circuit
protection. The 2TC dual safety
circuit breaker incorporates a
fusible element in a standard 2TC
(MS 3320) package size to
provide redundant protection in
hard fault conditions.

“Hard Fault” Tripping

The 2TC dual safety circuit
breaker operates identically to a
standard circuit breaker under all
normal conditions, including

short circuit. In the event of
circumstances which disable the
internal circuit breaker
mechanisms, such that the device
is able to carry current but unable
to clear an overload via its normal
means, the dual safety element
acts as a built in fuse to provide
redundant circuit protection.
The key part in the dual safety
design is a two part current
carrying element joined by a
special alloy. The geometry and
material of the element determine
its heating properties. The

elements heating properties are
slower than the bimetal sensor
but faster than the smoke curve
of the wire the rating is designed
to protect. In the case where the
standard mechanism is disabled
or cannot operate normally, the
separable element “fuses” open,
interrupting the current.
The benefits of the dual safety
design result in calibrated
overcurrent protection (based
on fuse times) and specified post
fuse dielectric properties for
system and human protection.

2TC49

“Dual Safety” Circuit Breaker

Approximate Time-Current Curves - 2TC49 Circuit Breakers

1000

100

Rated

Current

0.01 0.1 1 10 100 1000

Trip Time in Seconds

-54oC MAXIMUM TRIP CURVE

+25oC TRIP BAND

+121oC MINIMUM TRIP CURVE

Vibration* ..................................

Mechanical Shock .....................

Acceleration ..............................

Weight .......................................

Interrupt Current

Endurance

⁄

- 15 amps: 6000 amps at 28 VDC

⁄

amps: 2800 amps at 120 VAC, 400 Hz

3 - 15 amps: 2500 amps at 120 VAC, 400 Hz

2500 cycles ................................ 120 VAC, 400 Hz Inductive

5000 cycles ................................ 120 VAC, 400 Hz Resistive

2500 cycles ................................ 30 VDC, Inductive

5000 cycles ................................ 30 VDC, Resistive

10,000 cycles ............................. Mechanical, no load

* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-500 Hz

50 G’s

10 G’s

2TC49 - 25 gm max.

Voltage Drop

(max.)**

0.70
0.55
0.35
0.30
0.28

Sensata

Number

2TC49-2

⁄

2TC49-3
2TC49-5

2TC49-7

⁄

2TC49-10

** Max. voltage drop at nominal

rated current

Link Separation Characteristics

Maximum circuit breaker link separation times for locked contact

condition as a function of overload

⁄

3
5
7

⁄

400%

–
–
–

69.0
60.0

500%

–
–

95.0
28.0
35.0

600%

34.0
34.0
36.0
14.0
20.0

700%

20.0
20.0
18.0

8.0

12.0

800%

13.0
13.0
10.0

4.0

7.0

900%

9.0
9.0
6.0
3.5
4.0

1000%

6.0
6.0
3.5
2.0
2.5

Amp

Rating

% Overload Rated Current

Time (seconds)

Post-short circuit dielectric ......................................1125 VAC Min (1mA)

Post-link separation dielectric .......................................... 900 VAC (1mA)

Temp

+25

-54

+121

Min ULT

Trip

115%
115%

90%

Max ULT

Trip

138%
165%
138%

200%

5-20
7-40
3-13

500%
.5-2.0
.6-3.0

.33-1.1

1000%
.12-.53

.16-.8
.07-.3

Trip Time – Seconds

Calibration: 2

⁄

–15 amps

2TC49

Characteristics

.562

.083

.073

.036

.026

CASE COLOR

BLUE

5 AMP RATING

SHOWN

.781

.719

CENTER LINE OF MOUNTING

KEY .370-.380

Panel Mounting

.125±.005 Dia.

.445

±.005 Dia.

.375

±.005

.400 DIA.

.390

BREAKER IN CLOSED

POSITION

7/16-32NS-2A THREAD

BREAKER IN OPEN POSITION

BLACK

.250

.750 MAX.

#8-32 UNC

.250

.055

.040

1.312

1.218

1.030 MAX.

47o–43o

.281

.219

.531

.469

“Dual Safety™” 2TC49

5 AMP

RATING SHOWN

165%
138%
115%

90%

5TC Series

Single Phase, Ambient Compensated

Features

•

Trip free

•

Current ratings (20 - 50amps)

•

Coordinated ratings

•

High vibration resistance

•

High interrupting capacity

Overview

Klixon® single-phase TC devices
represent “state-of-the-art”
protection for today’s aerospace
power systems.

Coordination

The single phase 5TC rating is
coordinated so it will trip before
another circuit breaker, twice its
rating, in the event of a fault of

The Klixon trademark has set the
standard for aerospace circuit
breakers. The TC series offers the
endurance and reliability required
by exacting military specifications
and is available in standard current
ratings from 20 – 50 amperes.

Ambient Temperature

Compensation

The 5TC serves as an ambient
compensated circuit breaker. It
permits system designers to
specify smaller gauge wire where
the circuit breaker and wiring are
exposed to different ambient
temperatures. They are especially
suited for application where
ambient temperature exceeds the
160oF (71oC) maximum of non-

ambient compensated thermal
circuit breakers. The 5TC series
may be applied where operating
temperatures are as high as
250oF (121oC), with no derating
of the circuit breaker. This
eliminates the need for cooling
air and allows substantial weight,
space and cost savings.

Options

•

Longer pushbuttons

•

Standard or auxiliary switch

configuration

•

Terminal barriers

Qualifications

ASNE0732-005 ...................5TC65
NSA931321 .........................5TC50

5TC50

5TC65

up to 600 amps let through
current. This results in improved
overall equipment performance,
since only the smallest faulted
circuit is interrupted, while larg-
er circuits remain operational.

Calibration: 20-50 Amps

Characteristics

Temp oC

+23

-54

+70

+125

Min. ULT.

Trip

110%
110%
105%

90%

Max. ULT.

Trip

145%
165%
145%
145%

200%

2-18

70 sec. max.
1.5 sec. min.
1.5 sec. min.

500%

.15 - 2.5
.15 - 2.5
.15 - 2.5
.15 - 2.5

1000%

.045 - .6
.045 - .6
.045 - .6
.045 - .6

Trip Time - Seconds

The above calibration chart is representative of a standard commercial device. Sensata offers specific variants with similar

performance dependant on military or customer specifications. Temperatures are ±5oC.

Performance

Vibration .....................................

Mechanical Shock ........................

Acceleration .................................

Weight

Standard Device .....................

Auxiliary Device .....................

10 G’s minimum, 80-500 Hz

50 G’s

10 G’s

53 grams (w/o hw), 58 grams (w/hw)

55 grams (w/o hw), 59 grams (w/hw)

Interrupting Capacity

20-50 amps......4000 amps at 28 VDC

20-50 amps..... 2000 amps at 115 VAC,400 Hz

Endurance

2500 cycles...........115 VAC, 400 Hz,Inductive

2500 cycles...........28 VDC, Inductive

2500 cycles...........28 VDC, Resistive

5000 cycles...........Mechanical, no load

Amp Rating

Voltage Drop (max)*

0.150

0.120

.01

1 10 100

1000

Trip Time in Seconds

Rated

Current

Approximate Time-Current Curves - 5TC Circuit Breakers

+23oC TRIP BAND

-54oC MAXIMUM TRIP CURVE

+125oC MINIMUM TRIP CURVE

1.653 MAX.

1.299

50 AMP RATING

SHOWN

.768 MAX.

.622 MAX.

.378

1.920

2.170 MAX.

.827

.059

1.102 MAX.

1.575

.260

Panel Mounting

ø .492 ±.005

ø .138 ±.005

.375 ±.005

5TC

* Max. voltage drop at nominal rated current

Optional Aux. Switch

6752 Series Circuit Breakers

Ambient Compensated Single & Three Phase High Short Circuit Capacity

Features

•

Useable on large electrical systems – 6000 amperes

interrupting capacity

•

Circuit protection unaffected by temperature

fluctuation – ambient compensated from

-65 oF to +250 oF

•

Only faulted line circuits opened – coordination of

ratings ensures that branch circuit breakers trip

first under fault conditions

•

Long trouble-free operation – 20,000 operating cycles

•

Military approved

•

High amp devices available (65A & 90A)

Overview

The Klixon 6752-12 and -300
series thermal-magnetic circuit
breakers are ambient compensated
and trip-free. They are designed
and manufactured to meet the
more stringent military standards
of today’s jet aircraft, specifically
MIL-DTL-22715.
The higher short circuit capacity,
vibration resistance and longer
cycling life of the 6752-12 and
-300 series exceed previous
military standards. In addition,
the 6752-12 and -300 series
provide ambient compensation,
fault coordination of all ratings,
and an option for auxiliary circuits.

High Short Circuit Capacity

A deionizing grid and magnetic
assist enable the 6752-12 and
-300 series to successfully
interrupt four fault currents of
6000 amperes – two at sea level
and two at 60,000 feet – on either a
120 VAC , 400 Hz system or a 30 VDC
system.

Ambient Temperature

Compensation

Substantially unaffected by
ambient temperature, the 6752-12
and -300 series circuit breakers
maintain their performance capa-
bilities by means of a thermal
compensator in the temperature
range of -54 oC to+121 oC.

Coordination

The 6752-12 and -300 series
breaker ratings are coordinated
so any rating will trip before
another rating, twice its capacity,
in the event of a fault. This
results in improved over-all
equipment performance, since
only the smallest faulted circuit
is removed while larger circuits
remain in operation.

Auxiliary Circuit

The 6752-12 and -300 series are
available with auxiliary switch.
For part numbers and character-
istics, please consult the factory.

Number

6752-12-2

⁄

6752-12-5
6752-12-7

⁄

6752-12-10
6752-12-15
6752-12-20
6752-12-25
6752-12-35
6752-12-50

MS Number

MS 24571-2
MS 24571-5
MS 24571-7
MS 24571-10
MS 24571-15
MS 24571-20
MS 24571-25
MS 24571-35
MS 24571-50

MS 24571-2V
MS 24571-5V
MS 24571-7V
MS 24571-10V
MS 24571-15V
MS 24571-20V
MS 24571-25V
MS 24571-35V
MS 24571-50V

MIL Qualification

When ordering MS 24571-XX(V) style breaker by

Sensata part number, designator must include

S.R. 12507-356
Example: 6752-12-2

⁄

is S.R. 12507-356

6752-12

6752-300

Sensata

Single Phase

6752-12-2

⁄

6752-12-5
6752-12-7

⁄

6752-12-10
6752-12-15
6752-12-20
6752-12-25
6752-12-35
6752-12-50

Three Phase

6752-305-2

⁄

6752-305-5
6752-305-7

⁄

6752-305-10
6752-305-15
6752-305-20
6752-305-25
6752-305-35
6752-305-50

Voltage Drop

Max**

0.60
0.40
0.30
0.25
0.25
0.25
0.25
0.25
0.25

Sensata Number

** Max voltage drop at nominal rated current.

TEMP

+25

-54

+93

+121

MIN ULT

TRIP

110%
110%
105%

100%

MAX ULT

TRIP

138%
160%
138%
138%

TRIP TIME - SECONDS

200%
12-65
15-65
12-65
12-65

400%

2.3-10
2.3-10
2.3-10
2.3-10

1000%
.33-1.4
.33-1.4
.33-1.4
.33-1.4

† Single phase max. ult. trip values apply with other two phases carrying 100% of

rated current.

6752-12 Calibration: 2

⁄

- 50 amps

200%

12-32

14-36

16-40

18-42

20-45

20-48

20-50

20-53

20-55

400%

2.3-6.5

2.5-6.5

2.5-7.0

2.7-7.75

2.7-8.0

2.7-9.5

2.7-8.0

1000%

.32-1.1

.45-1.1

.34-1.1

.45-1.2

.36-1.2

.36-1.4

6752-12-2

⁄

6752-12-5

6752-12-7

⁄

6752-12-10

6752-12-15

6752-12-20

6752-12-25

6752-12-35

6752-12-50

6752-12

Characteristics

6752-305

2.200 MAX.

1.810

.905

.750 MAX.

.375

.312 TERMINAL WIDTH

Ø.468

#6–32UNC SCREWS

Ø.418

.093

.250

2.18

.250

2.37

MAX.

LINE TERMINAL

1.19

.594

45o

#8–32UNC–2A X .250 LONG

PHILLIPS HEAD SCREW &

SPLIT LOCKWASHER

.046 THICK (2 PLACES)

2.200 MAX.

1.810

.905

#6–32UNC SCREWS

2.270

MAX.

.750

1.500

.125

.625 DIA.

.550

2.180

2.370

2.470

45o

.594

1.190

#8–32UNC SCREWS

.804

.250

10,000

1000

100

Rated

Current

160%
100%

.01 .10 1 10 100 1000 10,000

Trip Time in Seconds

Approximate Time-Current Curves 6752 Circuit Breakers

6752

5 AMP RATING SHOWN

6752-305 Calibration: 2

⁄

-50 amps

Vibration* .............................

Mechanical Shock ................

Acceleration .........................

Weight ..................................

Interrupt Current

Endurance

⁄

- 50 amps: 6000 amps at 30 VDC (6752-12 only)

⁄

- 50 amps: 6000 amps at 120 VAC, 400 Hz

⁄

- 50 amps: 4200 amps at 205 VAC, 400 Hz

5000 cycles ................................ 120 VAC, 400 Hz Inductive

5000 cycles ................................ 120 VAC, 400 Hz Resistive

10,000 cycles ............................. Mechanical, no load

20,000 cycles ............................. Total

* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-2000 Hz

25 G’s

10 G’s

6752-12 – 91 gm max.

6752-305 – 292 gm max.

Performance Characteristics

Sensata Number

6752-100 Series Circuit Breakers

Ambient Compensated Single & Three Phase High, Short Circuit Capacity

6752-100

Features

•

Current ratings from 50-100 amps

•

Proven reliability and performance of the 6752 series

circuit breaker

•

Usable on large electrical systems – 6000 amperes

interrupting capacity

•

Circuit protection unaffected by temperature fluctuations

– ambient compensated from -40oF to +160oF

•

Military approved (including high sine vibration capability)

to MS 25361 and MS 25361 (V)

Overview

The Klixon® 6752-100 series
thermal-magnetic circuit breakers
are ambient compensated and
trip-free. These circuit breakers
are designed and manufactured to
meet stringent military standards
with the reliability of the original
6752 design. The 6752-100 is
similar to the 6752-12 in size, and
includes current ratings ranging
from 50-100 amps.
The higher short circuit capacity,
vibration resistance and longer
cycling life of the 6752-12 and -300
series exceed previous military
standards. In addition, the
6752-12 and -300 series provide
ambient compensation, fault
coordination of all ratings, and an
option for auxiliary circuits.

High Short Circuit Capacity

A deionizing grid and magnetic
assist enable the 6752-100 series to
successfully interrupt four fault
6000 amp currents, two at sea level
and two at 60,000 feet, on either a
120 VAC , 400 Hz system or a 30 VDC
system.

Ambient Temperature

Compensation

The 6752-100 series circuit
breakers maintains its
performance capabilities by
means of a thermal compensator
in the temperature range of
-40oC to +70 oC.

Sensata Number

6752-100-50

6752-100-60

6752-100-70

6752-100-75

6752-100-80

6752-100-90

6752-100-100

MS Number

MS 25361-50

MS 25361-60

MS 25361-70

MS 25361-75

MS 25361-80

MS 25361-90

MS 25361-100

Sensata Number

6752-102-50

6752-102-60

6752-102-70

6752-102-75

6752-102-80

6752-102-90

6752-102-100

MS Number

MS25361-50V

MS25361-60V

MS25361-70V

MS25361-75V

MS25361-80V

MS25361-90V

MS25361-100V

MIL Qualification

Characteristics

Envelope Dimensions

Temp

+25

-40

+70

Min ULT

Trip

105%
125%

70%

Max ULT

Trip

138%
165%
125%

200%
15-65
15-65
15-65

400%

2-10
2-10
2-10

1000%

1.4
1.4
1.4

Trip Time – Seconds

6752-100 Calibration

10,000

1000

100

0.01 .01 1 10 100 1000

Trip Time in Seconds

Approximate Time-Current Curves – 6752-100 Circuit Breakers

Rated

Current

UPPER LIMIT

AT –40oC

LOWER LIMIT

AT 70oC

165%

138%

105%

70%

2.189 MAX.

1.083

.750 MAX.

6–32UNC–2B

SELF-LOCKING NUT

(2 REQ’D)

(.312 MIN DEPTH)

.911

.901

4X R .090

1.817

1.807

(CLOSED POSITION)

.250 – 28UNF-2B INTEGRAL

ALL-METAL LOCKING NUT

(2 REQ’D)

MS35308-303

.250 – 28UNF-2A X .500L

CAP SCREW WITH

FLAT WASHER

(2 REQ’D)

DETAIL

.060 min.

.115

.035

.460

MIN.

.427

.395

1.930

MAX.

2.357

2.560

MAX.

.735

1.470

47o

43o

6752-100

#6-32 UNC SCREWS

Vibration* .....................................

Mechanical Shock .....................

Acceleration ................................

Weight ...........................................

Interrupt Current

Endurance

120 VAC, 400 Hz: 3500 amps

28 VDC: 6000 amps

5000 cycles .................................. 120 VAC, 400 Hz Resistive

5000 cycles .................................. 120 VAC, 400 Hz Inductive

5000 cycles .................................. 28 VDC, 400 Hz Resistive

2500 cycles .................................. 28 VDC, 400 Hz Inductive

5000 cycles .................................. no load

* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-2000 Hz

30 G’s

10 G’s

0.25 lbs (114 gm) max.

Performance Characteristics

3TC7 Series

Single Phase, Non Ambient Compensated, High Short Circuit Interrupting Capacity

Features

Overview

•

Lightweight

•

Miniature size

•

High interrupting capacity

•

High vibration resistance

•

Available in 5-35 amperes

Detailed Performance Data

6000 Amperes at 30VC

120 VAC, 400 Hz Inductive

120 VAC, 400 Hz Resistive

30 VDC, Inductive

30 VDC, Resistive

Mechanical, no load
10 G’s
30 G’s peak
10 G’s
39 gm
65,000 ft

3500 Amperes at

120 VAC, 400 Hz
2,500 Cycles

5,000 Cycles

2,500 Cycles

5,000 Cycles

Interrupting Capacity

Endurance

Vibration
Mechanical Shock
Acceleration
Weight
Operating Altitude

The Klixon 3TC7 style circuit
breaker is a lightweight, high
performance, non ambient
temperature compensated circuit
breaker that is well suited for
aircraft, avionics and electrical
systems. The 3TC7 series features
a trip free design that prevents
the circuit breaker from being
closed manually on overloads.
The 3TC7 interrupting a 6,000A
circuit at 30 VDC, or 3,500A circuit
at 120 VAC, 400 Hz.

The Klixon trademark continues to
set the standard for lightweight
configurations and offers the
endurance and reliability required
by exacting military specifications.
The 3TC7 is currently available in
5-35 amperes.

3TC7

MS Number

MS25244-5
MS25244-7

⁄

MS25244-10
MS25244-15
MS25244-20
MS25244-25
MS25244-30
MS25244-35

Amp Rating

5
7

⁄

10
15
20
25
30
35

Voltage Drop

.25
.25
.25
.25
.25
.25
.25
.25

Sensata Number

3TC7-5

3TC7-7

⁄

3TC7-10
3TC7-15
3TC7-20
3TC7-25
3TC7-30
3TC7-35

35 AMP RATING SHOWN

.750 MAX.

BREAKER IN OPEN POSITION

WHITE

BLACK

1.094
MAX.

.078

.240

1.74

.704

1.86

MAX.

.120

BREAKER IN CLOSED POSITION

Characteristics

Calibration

+25oC

-40oC

+71oC

Max Ult Trip

138%

178%

114%

200%

15 - 55 sec

600%

1.0 - 3.5 sec

Min Ult Trip

115%

148%

70%

400%

2.0 - 7.0 sec

0.1 1 10 100 1000

Trip Time in Seconds

1000

100

% Rated Current

Approximate Time-Current Curve 3TC7 Circuit Breakers

3TC7

.375 OF MOUNTING KEY C

ø .330

115%
138%

1.49

MS25082-C21

MS35338-136

MS51957-41

7274 Series Circuit Breakers

Low Amperage, High Performance

7274-2

Overview

Features

•

Uses minimum space

•

Light weight

•

Ratings: 1/2 – 20 amperes

•

Military approved

The 7274 series are small, light
weight, low amperage devices that
are specifically designed to
protect aircraft / aerospace cable
such as flat ribbon, fused
multi-conductor tape and printed
circuit conductors now being used
in lighter weight power
distribution systems and compo-
nents in airborne vehicles and
equipment.
The 7274 series features a trip-
free indicating-type reset button.
Also, a “wiping action” contact
design assures low voltage drop,
faster trip time and high reliability
in low voltage applications. They
are available in standard ratings
from 1/2 – 20 amps.
A water resistant panel seal*
designed to fit over the push
button actuator is available for
applications that require this type
of protection.

Options

Long push buttons
Auxiliary switch
Waterproof panel seal
High vibration

* Part number 14500-1 fits 7274-11 and other types

with 15/32” mounting bushing.
14500-5 fits 7274-2 (7/16”).

Sensata Number

7274-2-

⁄

7274-2-

⁄

7274-2-1
7274-2-1

⁄

7274-2-2
7274-2-2

⁄

7274-2-3
7274-2-4
7274-2-5
7274-2-7

⁄

7274-2-10
7274-2-15
7274-2-20

MS Number

MS 26574-

⁄

MS 26574-

⁄

MS 26574-1
MS 26574-1

⁄

MS 26574-2
MS 26574-2

⁄

MS 26574-3
MS 26574-4
MS 26574-5
MS 26574-7

⁄

MS 26574-10
N/A
N/A

Sensata Number

7274-11-

⁄

7274-11-

⁄

7274-11-1
7274-11-1

⁄

7274-11-2
7274-11-2

⁄

7274-11-3
7274-11-4
7274-11-5
7274-11-7

⁄

7274-11-10
7274-11-15
7274-11-20

MS Number

MS 22073-

⁄

MS 22073-

⁄

MS 22073-1
MS 22073-1

⁄

MS 22073-2
MS 22073-2

⁄

MS 22073-3
MS 22073-4
MS 22073-5
MS 22073-7

⁄

MS 22073-10
N/A
N/A

Sensata Number

7274-4-

⁄

7274-4-

⁄

7274-4-1
7274-4-1

⁄

7274-4-2
7274-4-2

⁄

7274-4-3
7274-4-4
7274-4-5
7274-4-7

⁄

7274-4-10
7274-4-15
7274-4-20

MS Number

MS 26574-

⁄

MS 26574-

⁄

MS 26574-1A
MS 26574-1

⁄

MS 26574-2A
MS 26574-2

⁄

MS 26574-3A
MS 26574-4A
MS 26574-5A
MS 26574-7

⁄

MS 26574-10A
N/A
N/A

Sensata Number

7274-69-

⁄

7274-69-

⁄

7274-69-1
7274-69-1

⁄

7274-69-2
7274-69-2

⁄

7274-69-3
7274-69-4
7274-69-5
7274-69-7

⁄

7274-69-10
7274-69-15
7274-69-20

MS Number

MS 22073-

⁄

MS 22073-

⁄

MS 22073-1V
MS 22073-1

⁄

MS 22073-2V
MS 22073-2

⁄

MS 22073-3V
MS 22073-4V
MS 22073-5V
MS 22073-7

⁄

MS 22073-10V
N/A
N/A

7274-70 Qualified to MS 26547L for ratings 1/2 amp to 10 amp.

7274-4

7274-11 and 7274-69

Characteristics

Vibration* .....................................

Mechanical Shock ........................

Acceleration .................................

Weight ..........................................

Interrupt Current

Endurance

1/2 - 5 amps: unlimited at 28 VDC

⁄

- 15 amps: 2000 amps at 28 VDC

1/2 - 1

⁄

amps: 800 amps at 120 VAC, 400 Hz

2 - 5 amps: 800 amps at 120 VAC, 400 Hz

⁄

- 20 amps: 500 amps at 120 VAC, 400 Hz

2500 cycles ................................. 120 VAC, 400 Hz Inductive

5000 cycles ................................. 120 VAC, 400 Hz Resistive

2500 cycles ................................. 30 VDC, Inductive

5000 cycles ................................. 30 VDC, Resistive

5000 cycles ................................. Mechanical, no load

* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-500 Hz

35 G’s

10 G’s minimum

7274-2: 28 gm max.

7274-4: 28 gm max.

7274-11: 33 gm max.

7274-69: 33 gm max.

Temp

+25

-55

+71

Min ULT

Trip

115%
135%

90%

Max ULT

Trip

150%
180%
130%

200%

2-20

–
–

500%

.16-1.2

–
–

1000%
.046-.8

–
–

Trip Time – Seconds

Calibration: 1/2–20 amps

Sensata Number

7274-XX-

⁄

7274-XX-

⁄

7274-XX-1

⁄

7274-XX-2

⁄

7274-XX-3

7274-XX-4

7274-XX-5

7274-XX-7

⁄

7274-XX-10

7274-XX-15

7274-XX-20

Voltage Drop

(Max.)**

2.00

1.45

1.10

0.75

0.70

0.55

0.45

0.35

0.30

0.28

0.25

**Max voltage drop at nominal rated current.

1000

100

0.01 0.1 1 10 100 1000

Trip Time in Seconds

Approximate Time-Current Curves 7274 Circuit Breakers

Rated

Current

180%
150%
115%
90%

UPPER LIMIT AT -55oC

7274-2 and 7274-4

7274-11 and 7274-69

.750

Panel Mounting

.125±.005 Dia.

.445

±.005 Dia.

.375

±.005

Panel Mounting

.125±.005 Dia.

.485

±.005 Dia.

.375

±.005

.562

.445

.032

.419

.744

.388

.110

.078

KEYWAY WASHER DETAIL

PUSH PULL BUTTON POSITION WITH

CIRCUIT BREAKER TRIPPED (OFF)

7/16-32NS-2 THREAD

.440

.191

.277 MAX.

.100

.213

.359

1.302

1.115

45o

.593

#6–32 UNC SCREWS

MOUNTING NUT

LOCK WASHER

KEYWAY WASHER

BACK-UP NUT

LOCK WASHER

PHILLIPS RECESS

PAN HEAD SCREW

.050 DIA

HOLE

AUXILIARY TERMINAL 7274-4 ONLY

15/32-32NS-2 THREAD

MOUNTING NUT

LOCK WASHER

KEYWAY WASHER

LOCK WASHER

PHILLIPS RECESS

PAN HEAD SCREW

.750

.562

.032

.078

KEYWAY WASHER DETAIL

45o

.203

.718
.472

.390

.093

.410

DIA.

.100

.255

.250

1.707

1.450

.480

.191

.703

#8–32 UNC SCREWS

PUSH PULL BUTTON POSITION WITH

CIRCUIT BREAKER TRIPPED (OFF)

7274

3 AMP RATING SHOWN

LOWER LIMIT AT 71oC

7277 Series Circuit Breakers

Low Amperage, General Application

Overview

Features

The 7277 series is designed for applications that do not

require the tighter performance characteristics and

approvals of our military circuit breakers.

•

Small size

•

Light weight

•

Inexpensive

•

Auxiliary switch

•

Longer push buttons

The 7277 series circuit breaker is
physically and electrically identical
to the 7274-2 style circuit breaker,
with the exception that the 7277
series has wider calibration limits.
Originally developed as an alterna-
tive to slow blow fuses, the trip
free 7277 is used extensively as
primary electrical circuit protec-
tion on general aviation aircraft.

Temp

+25

Min ULT

Trip

110%

Max ULT

Trip

150%

200%

2-35

500%

.15-1.70

1000%

.028-.55

Trip Time – Seconds

Calibration: 1/2–20 amps*

* Performance characteristics and dimensions are equivalent to 7274 which are

found on page 19.

Sensata

Number

7277-2-

⁄

7277-2-

⁄

7277-2-1

⁄

7277-2-2

⁄

7277-2-3

7277-2-4

7277-2-5

7277-2-7

⁄

7277-2-10

7277-2-15

7277-2-20

**Max voltage drop at nominal rated current.

1000

100

.01 .1 1 10 100 1000

Trip Time in Seconds

Approximate Time-Current Curves 7277 Circuit Breakers

Rated

Current

150%
115%

Ampere

Rating

1/2

3/4

⁄

Max. Drop**

(volts)

2.00

1.45

1.10

0.75

0.70

0.50

0.33

0.30

0.25

0.20

0.15

Ordering Information

Code System

7277 – 2 – 5

Basic type

Derivative

Ampere rating
(i.e., 5 = 5 amps,
7

⁄

= 7

⁄

amps)

7277 –1: Aux. switch version

The wider calibration limits of the
7277 has also resulted in
applications including protection
for data processing and
telecommunications equipment,
computers, flight simulators,
construction, material handling
and other industrial,electronic
equipment.

For use on trainer / simulator
applications where all breakers
are operated on low ampere
control current, different ampere
rating inserts (amp ratings on top
of push button) can be ordered.
Use TI part number 27515.
(Refer to 7274-2 and 7274-4
dimensions on previous page.)

7277-2

7277-1

20TC Series Circuit Breakers

Rocker Actuated Switch Type

Overview

Features

•

Versatile rocker actuator – snap-on,

switch type in various styles and

colors for panel mounting

•

Provides dual function – “ON/OFF”

circuit switching and protection

home appliances, office reproduc-
ing and calculating machines, and
data processing equipment.
Several different types of
actuators are available. The
translucent actuator permits quick
identification of the actuator
position under low ambient
lighting conditions by emitting a
soft glow from a light source, such
as an edge lighted panel. Colored

The Klixon 20TC series circuit
breaker offers the advantages of
integrating an on/off switch and a
circuit protector in a trim,
compact package. The snap-on
actuators are available on request
in a variety of colors, styles and
indication markings. They are
designed to provide a stylish
console appearance to the panels
of light aircraft, pleasure boats,

actuators will be hot letter
stamped in white. White and
translucent actuators will be
stamped in black.
The growing demand for a highly
stylized and aesthetic panel
appearance has generated the
need for the 20TC. The basic
mechanism has been proven for
reliability in a wide variety of
applications.

Envelope Drawings

.655 MIN

PANEL

OPENING

#6-32 NC-2 B (2 PLACES)

.750 MAX.

.375

1.620

1.375 MAX.

.250 OPERATING DISTANCE

1.200 MIN.

PANEL OPENING

.420

1.173

1.642

#8-32 UNC-2A RD HEAD SCREW

AND SPLIT L’ WASHER

Rocker Button Options

(SR12507-156-X)

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-11

-13

-16

-18

-19

-20

-21

-22

-23

-25

-26

-27

-28

-29

-30

-33

-34

-35

PUSH ON / LNDG LITE

PUSH ON / NAV LITE

PUSH ON / ANTI COLL

PUSH ON / PITOT HEAT

PUSH ON / BOOST PUMP

PUSH ON / GLIDE SLOPE

PUSH ON MKR BCN

PUSH ON / STROBE LITE

OFF

“SR TO INVERT MARKING”

PUSH ON / ROT BCN

PUSH ON / ELEV TRIM

PUSH ON / RADIO MASTER

PUSH ON / LDG LITE

ON / OFF

OFF

“COLORED BOX”

OFF

ON /OFF

OFF / ON

PUSH ON / LOW BOOST

PUSH ON / HIGH BOOST

PUSH ON / WX RADAR

PUSH ON / PROP DE ICE

PUSH ON / STBY VAC

NO ACTUATOR

ON / OFF

Code System

20TC2 – A A – 5

Basic type

See dimensional

drawing

Actuator Style

A = Serrated

Actuator Color

A = White

(Serrated

& Smooth)

Ampere Rating

3 =

5 =

⁄

10 =

15 =

20 =

25 =

30 =

35 =

3 amps

5 amps

⁄

amps

10 amps

15 amps

20 amps

25 amps

30 amps

35 amps

20TC2

Note:

Performance Characteristics similar to 7270/7271 devices on page 22 and 23.

7270 & 7271 Series Circuit Breakers

Miniature Aircraft

Features

•

Trip free

•

Snap-acting thermal element

•

Simplicity of design

•

High rupture capacity – 3500 amps,

120 VAC, 400 Hz, 4000 amps, 30VDC

•

Light weight

•

Small size

Overview

The Klixon 7270/7271 series
circuit breakers were designed to
utilize less space behind the panel
space while protecting wire and
cable in aircraft and ground
support equipment on either
120 VAC, 400 Hz or 30 VDC
systems. The units are available
with neck mounting (7270-1 and
7271-8) or standard cover plate
(7270-7 and 7271-3). In each of
these Klixon circuit breakers, the
bi-metallic element assures
uniform current distribution
throughout its responsive area.
This design reduces current den-
sity at the critical areas, resulting
in an element having a much
higher interrupting capability than
conventional design. Inherently
resistant to shock and vibration,
the Klixon disc element is capable
of precise calibration settings and
will retain the initial calibration
within close tolerances through-
out the service life of the breaker.
Both circuit breakers have
conventional actuator action; i.e.,
the toggle actuator on the 7270
moves to the OFF position for trip
indication and the button of the
7271 pops out. A standard black
button with a white collar is used.

Optional Covers

Sensata

Number

7270-1-3
7270-1-5
7270-1-7

⁄

7270-1-10
7270-1-15
7270-1-20
7270-1-25
7270-1-30
7270-1-35
7270-7-3
7270-7-5
7270-7-7

⁄

MS Number

N/A
MS 24509-A-5
MS 24509-A-7

⁄

MS 24509-A-10
MS 24509-A-15
N/A
N/A
N/A
N/A
N/A
MS 24509-B-5
MS 24509-B-7

⁄

Sensata

Number

7270-7-10
7270-7-15
7270-7-20
7270-7-25
7270-7-30
7270-7-35
7271-3-3
7271-3-5
7271-3-7

⁄

7271-3-10
7271-3-15
7271-3-20

MS Number

MS 24509-B-10
MS 24509-B-15
N/A
N/A
N/A
N/A
N/A
MS 24510-B-5
MS 24510-B-7

⁄

MS 24510-B-10
MS 24510-B-15
N/A

Sensata

Number

7271-3-25
7271-3-30
7271-3-35
7271-8-3
7271-8-5
7271-8-7

⁄

7271-8-10
7271-8-15
7271-8-20
7271-8-25
7271-8-30
7271-8-35

MS Number

N/A
N/A
N/A
N/A
MS 24510-A-5
MS 24510-A-7

⁄

MS 24510 A-10
MS 24510-A-15
N/A
N/A
N/A
N/A

Qualifications

#6-32 NC-2A

SELF-LOCKING NUT

.313

.484

.188

.750 MAX.

2.188

7271-3

7270-7

#6-32 NC-2A

SELF-LOCKING NUT

.313

.484

.188

.750 MAX.

2.188

7270-7

7271-8

7271-3

7270-1

Temp

+25

-40

+71

Min ULT

Trip

115%

138%

80%

Max ULT

Trip

145%

175%
125%

200%

40-120
40-100

10-70

–
–

400%

3-26
3-22

.75-7.0

–
–

600%

1-12
1-10

.25-2.5

–
–

Trip Time – Seconds

Vibration* .....................................

Mechanical Shock .....................

Acceleration ................................

Weight ..........................................

Interrupt Current

Endurance

4000 amps, 30 VDC

3500 amps, 120 VAC, 400 Hz

200 cycles ................................... 30 VDC Inductive

5000 cycles ................................. 120 VAC, 400 Hz Inductive

5000 cycles ................................. 120 VAC, 400 Hz Resistive

5000 cycles ................................. 30 VAC, 400 Hz Resistive

10,000 cycles .............................. Mechanical, no load

* Other vibration levels available. Contact factory for details.

10 G’s minimum, 50-500 Hz

30 G’s

10 G’s

7270-1 – 39 gm max.

7271-8 – 39 gm max.

1000

100

0.01 0.1 1 10 100 1000

Trip Time in Seconds

Approximate Time-Current Curves 7270 and 7271 Circuit Breakers

Rated

Current

175%

145%

115%

80%

Characteristics

7270-1

UPPER LIMIT AT -40oC

LOWER LIMIT AT 71oC

Sensata

Number

7270’s

7270-x-3
7270-x-5
7270-x-7

⁄

7270-x-10
7270-x-15
7270-x-20
7270-x-25
7270-x-30
7270-x-35

Voltage Drop

(Max.)**

0.75
0.65

0.5
0.5
0.5
0.5
0.5
0.5
0.5

**Max voltage drop at nominal rated current.

Sensata

Number

7271’s

7270-x-3
7270-x-5
7270-x-7

⁄

7270-x-10
7270-x-15
7270-x-20
7270-x-25
7270-x-30
7270-x-35

Calibration: 3-35 amps

Rating

3 amps
5 amps

71/2-35

–
–

7271-8

55o ±7o

.609

BREAKER IN

“ON” POSITION

BREAKER IN “OFF”

(OR TRIPPED) POSITION

WASHER

.250

.844

1.313

.375

45o

.906

THE CONFIGURATION AND SIZE OF ALL

7270/7271 SERIES CIRCUIT BREAKERS, FROM

THE TOP PLATE DOWN, ARE THE SAME.

.750

1.375

.375

.093

DIA.

AMP RATING

MOUNTING NUT

WASHER KEYWAY

15/32-32

NS-2A THREAD

.094

.188

#8-32 UNC

SCREWS

DIMENSIONS IN INCHES

1.375

.750 MAX.

.375

BREAKER IN “OFF”

(OR TRIPPED) POSITION

BREAKER IN

“ON” POSITION

.718

.593

.468-32NS-2A THREAD

.100 DIA.

#8-32 UNC SCREWS

.531

.806

.843

1.218

1.313

7270/7271

5 AMP RATING SHOWN

3SB Series Simulator Circuit Breakers

Features

•

Low amperage / fast trip response

•

High performance

•

Packaged in Military Standard configuration

•

Tactile feel equivalent to industry

accepted aircraft circuit breakers

•

Lower total system cost

Overview

The 3SB Series Simulator Circuit
Breaker has been developed by
the Precision Products Group of
Sensata Technologies to meet the
growing needs of the commercial
and military simulator industry.
With more and more training now
being conducted on simulators
due to the high operational costs
of live training, the realism and
complexity of tomorrow’s
simulators will require a circuit
breaker that can provide the same
“look and feel” of industry
accepted circuit breakers,
creating a superior training
environment.
3SB electromechanical devices
provide fast trip response with
low current draw at 28 VDC, and
are packaged in a standard

MS26574 style thermal circuit
breaker configuration for
adaptability to aircraft cockpit
panel mounting. This fast
trip/low current performance
provides the opportunity for
system level savings by enabling
the designer to potentially down
size the system power source.
This eliminates expensive I/O
boards or other electronics while
also reducing the amount of
cabling required.
Changes in training schemes
normally entail system rewiring
to reconfigure the simulator,
which becomes labor intensive
and costly. With the
incorporation of the 3SB device,
training changes can easily be
achieved through system

software, without the time and
cost associated with rewiring.
Sensata’s simulator circuit breakers
also provide the same tactile feel
as standard MIL qualified
breakers to achieve superior
training realism.
Klixon circuit breakers offer the
flexibility of ordering replaceable
ampere rating inserts. They are
attached to the top of the push
button actuator, to match the
current rating used in the actual
aircraft. These inserts can be
rotated within the push button to
meet your cockpit configuration
needs. An optional auxiliary
switch for remote indications,
along with a variety of
connection alternatives, are also
available.

3SB4

3SB2

EXAS

NSTRUMENTS

MADE IN U.S.A.

EXAS

NSTRUMENTS

MADE IN U.S.A.

Characteristics

3SB2

3SB4

.750

.562

3 AMP RATING

SHOWN

BREAKER IN

CLOSED POSITION

BREAKER IN OPEN POSITION

.395

.216

.100

.359

1.302

1.115

45o

.296

.593

ACCEPTS

MS 51957-25

SCREW OR

SOLDER CONNECTION

BLACK

WHITE

.191

.451

.277 MAX.

1.420

MAX.

Open and Reset Force ...
Calibration @ 25oC .........

Endurance ..........................

Vibration..............................
Shock ...................................
Acceleration ......................
Weight .................................

5 lbs. max.
200 mA max. current draw @

28 VDC, 3 sec. max trip time
5000 mechanical cycles, no load

1000 electrical trip cycles, minimum

at 28 VDC
5 G’s maximum 50-500 Hz
5 G’s maximum
5 G’s maximum
30 grams maximum

Dummy Circuit Breakers

Sensata Technologies has developed a derivative of our

7274 style circuit breaker expressly for applications in

simulators, trainers and cockpit mock-ups.

7274-63D:

Dummy breaker. Non-functional 7274-2 style

7274-64PS:

Physical sample. 7274-2 style with opera-

tional push button. Can measure continuity across

terminals.

7274-65PS:

Physical sample. 7274-11 style with opera-

tional push button. Can measure continuity across

terminals.

Part Numbering Code

3SB 2 - 1 - X

Basic Device Series

Calibration

Requirements

Physical Characteristics
2 = Standard device

4 = Auxiliary switch

21 = Standard device w/cover

22 = Standard device w/green push button

24 = Auxiliary switch w/green push button

41 = Auxiliary switch w/cover

Ampere Rating Inserts

N = No Insert

B = Blank Insert

D = “D” Rating Insert

AMP = Amp Rating (i.e., “5”)

.750

.562

3 AMP RATING

SHOWN

BREAKER IN

CLOSED POSITION

BREAKER IN OPEN POSITION

.216

.100

.359

1.302

1.115

45o

.296

.593

ACCEPTS

MS 51957-25

SCREW OR

SOLDER

CONNECTION

BLACK

WHITE

.191

.451

.277 MAX.

1.420

MAX.

AUXILIARY TERMINAL

OR SOLDER CONNECTION

Ø .050 HOLE

(2 PLACES)

3SB

.395

APD Series Circuit Breakers

Arc Fault Protection Device

Features

•

Small and lightweight

•

Current ratings 1-25 amperes

•

Detects arcs over considerable distances

•

Senses small arc currents in presence of large current loads

•

Insensitive to RFI/EMI and cross talk signals

•

Differentiates between normal load current and arc current

•

Immune to load start up transients

•

Retrofitable – fits into existing panel designs

Overview

The Arc Fault Circuit Breaker
series has been developed by
Sensata Technologies to meet the
evolving needs of the aerospace
industry. Traditional circuit
breakers were only designed to
detect over-current (I2t)
conditions. However, many
serious electrical incidents are
caused by low level arc fault
conditions resulting from
damaged or aging wire which
present generation circuit
breakers are not designed to
detect or protect against.
Sensata recognizes the evolving
requirements of the aerospace
industry and the need for
supplemental arc fault protection.
Sensata developed a small,
lightweight package configuration
based around proven Klixon®
commercial and mil-spec circuit
breaker designs, integrating the
traditional over-current trip fea-
tures of today’s circuit breakers
with new supplemental arc fault
detection and protection features.
shut down for motor, fan, strobe
light, or fluorescent light.
The two arc fault catalog pages
represent the first generation of

arc fault circuit breakers that will
be used in the commercial
aerospace market. The first
generation design is based upon
the industry need to support
120VAC, 400 Hz aircraft
applications.
Future design considerations for
the arc fault circuit breakers
under development by Sensata
comprehend and include:

•

Arc fault trip indication

•

28VDC

•

Operating temperature range

expansion

•

Single phase 30–100A

•

Three–phase development

•

Ground fault detection

•

Variable voltage and

frequency options

Ambient Temperature
Compensation

The arc fault series of circuit
breakers are based on the design
of our existing ambient compen-
sated circuit breakers product
family permitting system
designers to specify smaller
gauge wire where the circuit
breaker and wiring are exposed
to different ambient
temperatures. The arc fault

circuit breakers can operate over
a temperature range of
-54oC to 71oC however, care
should be taken to understand
the specification limits at ele-
vated ambient temperatures.

Trip Free

The complete line of arc fault
series circuit breakers is trip
free. The circuit breaker cannot
be maintained closed during an
overload, even when the actuator
is held closed.

High Short Circuit Capacity

The arc fault series of circuit
breakers offers unusually high
short circuit current interrupting
capacity. Depending on the
device, overloads of up to
3500 amps at 120VAC, 400 Hz
can be safely interrupted.

Options

Longer push buttons
High vibration
Random vibration capability
U.S. terminals (offset/inline)
Metric mounting threads

SENSATA TECHNOLOGIES

TEMP

+25

-54

+121

MIN ULT

TRIP

115%
115%

85%

MAX ULT

TRIP

138%
165%
145%

TRIP TIME - SECONDS

200%

4-16
7-35
2-13

500%
.4-1.6
.6-3.0

.25-1.0

1000%
.10-.40
.15-.70
.06-.25

Vibration*....................... 10 G’s minimum, 50 - 500 Hz

Mechanical Shock.......... 50 G’s

Acceleration................... 10 G’s

Weight............................ 42 gm max

Interrupt Current

1-20 amps: 6000 amps at 28 VDC

25 amps: 1625 amps at 28 VDC

1-15 amps: 2500 amps at 120 VAC, 400 Hz

20 amps: 2000 amps at 120 VAC, 400 Hz

25 amps: 1800 amps at 120 VAC, 400 Hz

Endurance

2500 cycles 120 VAC, 400 Hz Inductive

5000 cycles 120 VAC, 400 Hz Resistive

2500 cycles 30 VDC Inductive

5000 cycles 30 VDC Resistive

10,000 cycles Mechanical, no load

* Other vibration levels available. Contact factory for details.

Characteristics

Calibration: 1-25 amps

Approximate Time-Current Curves – APD Circuit Breakers

1000

100

Rated

Current

0.01 0.1 1 10 100 1000

Trip Time in Seconds

165%
138%
115%
85%

-54oC MAXIMUM TRIP CURVE

+25oC TRIP BAND

+121oC MINIMUM TRIP CURVE

Arc Fault

1.200

MAX

5 AMP RATING SHOWN

15/32

ø .395

1.219

1.312

.704

NEUTRAL LEAD LENGTH

& CONNECTION TBD

.284

1.030 MAX

.800 MAX

Performance:

Discrimination (resistance to nuisance trips)

Devices manufactured by Sensata have demonstrated success

on start up, bus transfer, and shut down for motor, fan,

strobe light, and fluorescent light.

Detail performance per test document 76508

Phase to Phase and Phase to Ground 400 Hz, 120/205VAC

Guillotine Arc Test:

Guillotine Arc Current .......Less than 700% RC rms

Steady State Load ..............None to rated current

Maximum Arcing Cycles ....Eight

Arcing Time Duration .........Less than 100ms

Loose Terminal Arc Detection

Steady State Load ..............Less than 40% RC rms

Tripping Time: ....................Less than 2 minutes

Vibration Source .................Eccentric motor vibratory table

Wet Arc Detection

MIL-STD-2223 Method 3005, wire per MIL-W-81381/11

Boeing Basic Specification

BACC18U
BACC18W
BACC18Z
BACC18AA
BACC18AC
BACC18AD
BACC18AE
10-60806-XX
10-60806-XXXX

Boeing (DPD)

5D0001
None
None

Sensata

Style

7274-21
7276-13
2TC6
2TC14
6TC6
2TC47
9TC6
6752-304
6752-311

7274-62
7274-55
7276-115

Airbus Basic Specification

NSA931303
NSA931304
NSA931320
NSA931321
NSA931322
NSA931323
NSA931324
NSA931325
E0730-005
E0731-005
E0732-005
E0733-005

Sensata

Style

6752-12
6752-305
2TC50
5TC50
6TC50
15TC50
2TC64
6TC64
2TC65
6TC65
5TC65
15TC65

Commercial Aircraft Circuit Breaker Cross Reference

QPL approved Aircraft Circuit Breakers specifications have been or are in the process of being converted to SAE
industry standard. The specification requirements and part marking remains as per the original military slash
sheet. The only difference is the SAE industry designation for the military slash sheet.

Lockheed Basic Specification

LS10158

LS10159S

Sensata

Style

2TC20, 3TC20
2TC26/3TC26
6TC20, 9TC20
6TC26/9TC26

For FAA/PMA part availability go to

www.sensata.com

Cross Reference

European Norms

EN2495
EN2592
EN2794
EN2995
EN2996
EN3661
EN3662
EN3773
EN3774

AS Number

AS 33201
AS 33201L
AS 33201V
AS 14105
AS 14105L
AS 14153
AS 14154
AS 14154L

Sensata Number

2TC2
2TC27
2TC63
3TC2
3TC27
9TC2
6TC2
6TC37

AS Number

AS 14154V
AS 22073
AS 22073V
AS 26574

AS 25244

AS 25244(P)

Sensata Number

6TC63

7274-11

7274-69
7274-2

3TC7

3TC8

AS Number

AS 26574A
AS 26574L
AS 24509A
AS 24509B
AS 24510A
AS 24510B

Sensata Number

7274-4
7274-70
7270-1
7270-7
7271-8
7271-3

Simplified Glossary of Circuit Breaker Terms

Circuit breaker

–

A device

designed to carry a specific value
of current and automatically open
a circuit upon overloads or
short circuits.

Thermal circuit breaker

–

A circuit breaker that senses a
current overload based on thermal
heating of the sensing element.

Time-current curve

–

An approx-

imate graph showing the minimum
and maximum time a specific
breaker will take to trip on various
degrees of overload.

Ambient compensation

–

A feature of some thermal breakers
that limits or eliminates thermal
derating due to ambient
temperature.

Minimum ultimate trip

–

Current

rating at which a breaker will not
trip within a certain period (usually
1 hour) at a specified temperature.

Maximum ultimate trip

–

Current

rating at which a breaker must trip
within a certain period (usually 1
hour) at a specified temperature.

Thermal derating –

Tendency of a

breaker to trip at lower current
levels due to higher ambient
temperatures, and to trip at higher
levels due to lower ambient
temperatures.

Trip-free

–

Feature of certain

breakers that makes it impossible to
hold the breaker closed against an
overload.

Manual reset

–

Method of

accomplishing reclosure after
circuit interruption has occurred.

Indicating, non-indicating

–

Whether or not breaker gives
prominent visual indication of
opening, such as exposing a white
band around button, or moving
toggle to off position.

Manual trip

–

Ability of breaker

to be opened manually.

Auxiliary circuit

–

An integrally

housed, electrically independent
switch linked mechanically to
operate with the main circuit
breaker contacts.

Voltage drop

–

The voltage

decrease across the breaker due to
internal resistance of the device.

WARRANTY

Sensata Technologies warrants its circuit breakers

against faulty workmanship or the use of

defective materials for a period of 18 months

from date of manufacture. This warranty

applies only to products purchased directly

from Sensata Technologies or through an author-

ized Sensata Technologies distributor. During the

warranty period, any circuit breaker found by

Sensata Technologies, in its sole judgement, to be

defective, will be repaired or replaced, at the

option of Sensata Technologies. Under no circum-

stances does Sensata Technologies responsibility

or liability extend to incidental or consequen-

tial damages whatsoever.
The foregoing is in lieu of all warranties

express, implied or statutory, including, but not

limited to, any implied warranty of merchant-

ability and fitness for a purpose and of any

other warranty obligation on the part of

Sensata Technologies.

Important Notice: Sensata Technologies (Sensata) reserves the right to make changes to or discontinue any product or

service identified in this publication without notice. Sensata advises its customers to obtain the latest version of the relevant

information to verify, before placing any orders, that the information being relied upon is current. Sensata assumes no re-

sponsibility for infringement of patents or rights of others based on Sensata applications assistance or product specifications

since Sensata does not possess full access concerning the use or application of customers’ products. Sensata also assumes

no responsibility for customers’ product designs.

www.sensata.com

New York

California

Georgia

France

Holland

United Kingdom

Israel

Italy

Singapore

Authorized U.S. Distributors of All Products

Name

Peerless Electronics

Flame Enterprises

TPS Aviation
Avio Diepen
Wesco Aircraft

Main Office

Lynbrook, NY

Canoga Park, CA

Hayward, CA
Atlanta, GA
Wichita, KS

Phone

(800) 285-2121

(516) 593-2121
(800) 854-2255

(818) 700-2905
(510) 475-1010
(770) 996-6430
(800) 544-4070

Fax

(516) 593-2179

(818) 700-9168

(510) 475-8817
(770) 996-8430

Web Site

www.peerlesselectronics.com

www.flamecorp.com

www.avio-diepen.com
www.airtechnics.com

Name

JB Controls
Avio Diepen

Charcroft Electronics Ltd

Odem Electronics
Patton Air
Precision Technologies

Main Office

Paris, France
Holland

England

Israel
Italy
Singapore

Phone

33 1 56 47 04 04
31 172 449759

+44 (0) 1591 610408

972 3 966 0340
39 331 792 658
6 65 27 34 573

Fax

33 1 56 47 04 05
31 172 449789

972 3 966 0345
39 331 796 552
6 65 27 38 898

Web Site

jboher@jbcontrols.com
avio-diepen@avio-diepen.com

sales@charcroft.com

www.odem.co.il
provest@logic.it
pretech@singnet.com.sg

Other Distributors and Sales Agents

Authorized Distributors

Kansas