A

Current and time based switch

Temperature limiter

Thermostat

Applications

- Household appliances
- Electronics
- Fan heaters
- Automotive industry

Benefits

- More safety by self hold types
- PCB terminals available
- Customised ratings
- Manual reset

10
20
30
40

Technical data ( standard types )

                                                                         TCO 

ratings

A10V 

A11V

A20V 

A21V

A30V 

A31V

A40V 

A41V

function

automatic

manual

self hold

230 V

self hold

120 V

version

normally closed

VDE

rated current at 50 / 60 Hz ( power factor 0.95 / 0.6 )

16 A / 2.5 A (250 V)

16 A / 2.5 A (250 V)

16 A / 2.5 A (230 V) 19.2 A / 2.5 A (120 V)

switching cycles

10,000

1,000

10,000

8,000

temperature range T

a

 ( steps in 5 K  )

70 °C ... 160 °C

70 °C ... 130°C / 140 °C

70 °C ... 160 °C

UL

rated current at 50 / 60 Hz ( power factor 1.0 / 0.75 )

16 A / 6.3 A (250 V)

16 A / - (125 V)

switching cycles

6,000

temperature range T

a

 ( steps in 5 K  )

70 °C ... 160 °C

max. current at 250 V 50/60Hz( power factor 0.95 )

25 A

switching cycles under max. current

200

tolerance

standard: ± 5 K

feature of automatic action

1.B, 2.B

2.B

2.C

contact resistance

< 50 mΩ

hysteresis / reset temperature 

1)

30 K ± 15 K / -

- / < -20 °C ; < -10°C

- / < -20 °C 

2)

suitable for use in protection class

I, II

approvals

VDE / ENEC

EN 60730-1 / -2-9

UL

UL 873

CSA

C22.2 No. 24 

3)

CQC

GB14536.1-1998 / GB14536.10-1996 

4)

1)

 at the T

a

 (upper and lower) limits the hysteresis could deviate       

2)

 without air flow       

3)

 different power rating       

4)

 details on request

Terminals

code

used in TCO

illustration

drawing

dimensions ( mm )

technical

specification

approvals

standard

A10, A11, A12, A13 

A20, A21, A22, A23 

A30, A31, A32, A33 

A40, A41, A42, A43

terminals for soldering, 

screwing, riveting or 

welding 

CuNi18Zn20 

1)

VDE, UL, 

CSA

A321

A10, A12 

A20, A22 

A30, A32 

A40, A42

SMD terminals

CuNi18Zn20 

1)

VDE, UL

A322

A10, A12

 A20, A22

 A30, A32

 A40, A42

THT

 terminals

CuNi18Zn20 

1)

 

VDE, UL

1)

 P types have terminals of CuFe2P material

TCO

illustration

drawing

dimensions ( mm )

technical

specification

approvals

standard

current - time 

based 

1)

A10V

A12V

base of thermosetting plastic

VDE, UL, 

CSA

A11V 

A21V 

A31V  

A41V

 

A13V 

A23V 

A33V 

A43V

screw-on fixing

base of thermosetting plastic

VDE, UL, 

CSA

A20V

A22V

manual reset

base of thermosetting plastic

possible srew-on fixing

dimensions see above

VDE, UL, 

CSA

A30V

A40V

A32V

A42V

voltage maintained PTC

120V or 230V

base of thermosetting plastic

possible screw-on fixing

dimensions see above

VDE, UL, 

CSA

1) 

For current-time based types (execution D, J, K, L, M, P, R, V) the following information must be 

  provided:

Standard types

DC or AC voltage U

N

 in Volts.

Continuous operating current I

C

 

in Amps at which the switch must not respond.

Current level I

0

 in Amps  at which the switch must respond.

Response time t

0

 (in seconds ± tolerance) within which the switch must respond after reaching I

0

.

Ambient temperatures which could be experienced both in normal operation and 
in switching conditions.

Maximum current in Amps.

Technical data on request.

       

For special applications version P is available with a very low self heating rate.

       

Manual reset: The maximum operating force must not exceed 6 N. The control should not be reset before the starting con-
ditions are reached, meaning there should be a satisfactory cooling down time!

Ordering and marking example

Characteristics of current vs. self heating and current vs. time

Fon: +49 (0)7231 787-0
Fax : +49 (0)7231 787-155
E-Mail: info@microtherm.de
Internet: www.microtherm.de

Microtherm GmbH

Täschenwaldstraße 3
Postfach 1208
D-75112 Pforzheim

01/2014-HB   Technical subject to change without notice

Ordering example

Marking

                                                      

                                         

     
                                   terminal code
                           tolerance
                  temperature
           execution
 type 

A10V

    

type and execution

D 

country (D=Germany)

12005

 

response temperature (120°C), tolerance (± 5K)

051

 

date of manufacture (May 2011)

A10    V    120    05   A321  

 Representation office:

Test conditions:
Measurement in air flow and lead wires 
of 1.5 mm

2

.

TCO variations for current-time based appli-
cations.

A12D

    

type and execution

H 

country (H=China)

--123

 

customised type with drawing number

051

 

date of manufacture (May 2011) 

Deviations from standard controls on request.

self-heating [K]

response time  t

0

  [s]

current I

0 

[A]

current I

0 

[A]

A10V

A10P