FUSES
/ SICHERUNGEN
PFMT
Resettable fuses
www.schurter.com
19
Surface Mount
PTC-Fuses
Type PFMT
5,4 x 8,5 mm
High voltage surge
capabilities
Compliance to ITU
K.20/K.21 specifications
Packaged per EIA 486-B
Agency recognition:
UL, CSA, TÜV
Typical Time to Trip at 23 ˚C
Time to trip
(s)
Dimensions
Applications
Used as a secondary overcurent
protection device in:
• Customer Premise Equipment
(CPE)
• Central Office (CO)
• Subscriber Line Interface
Cards (SLIC)
Test Procedures And Requirements For Model PFMT Series
Test
/ Test
Test Conditions
/ Bedingungen
Accept/Reject Criteria
Visual/Mech.
/ visuell/mech.
Verify dimensions and materials
/ Kontrolle Abmess./Mat.
Per MF physical description
Resistance
/ Widerstand
In still air @ 23°C
/ bei ruhiger Luft 23 °C
R
min
≤
R
≤
R
max
Time to Trip
/ Trip-Zeit
At specified current, V
max
23 °C
/ Bei entspr. Strom
T
≤
max.
time to trip
(sec.
)
Hold Current
/ Haltestrom
30 min. at I
hold
/ bei Haltestrom
No trip
/ Keine Auslösung
Trip Cycle Life
/ Trip-Zyklen
V
max
, I
max
, 100 cycles
/ Zyklen
No arcing or burning
Trip Endurance
/ Zeit im Tripzustand
V
max
, 48 hours
/ Stunden
No arcing or burning
Solderability
/ Lötbarkeit
MIL-STD-202F, Method 208F
/ Methode 208F
95% min. coverage
Environmental Characteristics
Operating/Storage Temperature
/ Einsatz/Lagertemp.
-45 °C
to
+85 °C
Maximum Device Surface Temperature in Tripped State
/
125 °C
Passive Aging
/ passive Alterung
+85 °C, 1000
hours
/ Std.
± 2%
typ. resist. change
+60 °C, 1000
hours
/ Std.
± 3%
typ. resist. change
Humidity Aging
/ Feuchtigkeitsalterung
+85 °C, 85% R.H. 500
hours
/ Std.
± 3%
typ. resist. change
Thermal Shock
/ Thermischer Schock
MIL-STD-202F, Method 107G ±10%
typ. resist. change
+125 °C/–55 °C 10
times
/ Zyklen
±15%
typ. resist. change
Solvent Resistance
/ Lösungsmittel-Beständigkeit
MIL-STD-202, Method 215B
No change
Lead Solerability
/ Lötbarkeit
ANSI/J-STD-002
Flammability
/ Entflammbarkeit
IEC 695-2-2
No Flame for 60 sec.
Vibration
MIL-STD-883C, Method 2007.1,
No change
Condition A
Typical Part Marking
Layout may vary
Manufacturer’s
Trademark
Part identification
Date code week 1 of 2000 = 0A (year and week)
week 27 of 2000 = A0 (week and year)
Resistance Bin
50 75 100
Fault current
(A)
0.1 1 5
20
10
1
0.1
0.01
PFMT.013.250.A.2
PFMT.013.250.A.2
PFMT.013.250.C.2
PFMT.013.250.2
PFMT.013.250.B.2
1.8
(.071)
4.6
(.181)
9.7
(.382)
1.8
(.071)
4.6
(.181)
Solder pad layouts
End View /
Endansicht
Side View
End View /
Endansicht
C
B
D
A
C
E
FUSES
/ SICHERUNGEN
PFMT
Resettable fuses
www.schurter.com
20
Electrical Characteristics
Type
/ Typ
A
B
C
D
E
min.
max.
max.
max.
nom.
nom.
PFMT.013.250.2
8.5
9.4
3.4
7.4
0.3
3.75
(0.335)
(0.370)
(0.134)
(0.291)
(0.011)
(0.148)
PFMT.013.250.A.2
8.5
9.4
3.4
7.4
0.3
3.75
(0.335)
(0.370)
(0.134)
(0.291)
(0.011)
(0.148)
PFMT.013.250.B.2
8.5
9.4
3.4
7.4
0.3
3.75
(0.335)
(0.370)
(0.134)
(0.291)
(0.011)
(0.148)
PFMT.013.250.C.2
8.5
9.4
3.4
7.4
0.3
3.75
(0.335)
(0.370)
(0.134)
(0.291)
(0.011)
(0.148)
Dimensions
Soldering Profile
/ Lötprofi
l
How To Order
PF MT .xxx .xxx .x .x
PTC-Fuse
Style
MT = Surface Mount/
Telecom Component
Hold Current, I
hold
013 (0.13 Amps)
Max. Interrupt Voltage, V
250 (250 V)
Resistance Sorted
Ω
A = 6.5-9
Ω
B = 9-12
Ω
C = 7-12
Ω
Packaging Options
Packaged per EIA 486-B
2 =
Tape and reel
Solder reflow
• Recommended reflow methods: I
R
,
vapor phase oven, hot air oven.
• Devices are not designed to be
wave soldered to the bottom side
of the board.
• Gluing the devices is not recom-
mended.
• Recommended maximum paste
thickness is 0,25 mm (.010 inch).
• Devices can be cleaned using
standard industry methods and
solvents.
Note:
• If reflow temperatures exceed the
recommended profile, devices
may not meet the performance
requirements.
Rework
• A device should not be reworked.
Thermal Derating Chart-I
hold
/I
trip
(Amps)
Type
/ Typ
Ambient Operating Temperature
–40 ˚C
–20 ˚C
0 ˚C
23 ˚C
40 ˚C
50 ˚C
60 ˚C
70 ˚C
85 ˚C
PFMT.013.250.2
0.21/0.42
0.18/0.37
0.16/0.31
0.13/0.26
0.10/0.23
0.09/0.18
0.08/0.15
0.07/0.12
0.05/0.10
PFMT.013.250.A.2
0.21/0.42
0.18/0.37
0.16/0.31
0.13/0.26
0.10/0.23
0.09/0.18
0.08/0.15
0.07/0.12
0.05/0.10
PFMT.013.250.B.2
0.21/0.42
0.18/0.37
0.16/0.31
0.13/0.26
0.10/0.23
0.09/0.18
0.08/0.15
0.07/0.12
0.05/0.10
PFMT.013.250.C.2
0.21/0.42
0.18/0.37
0.16/0.31
0.13/0.26
0.10/0.23
0.09/0.18
0.08/0.15
0.07/0.12
0.05/0.10
Dimensions in mm/inches
Type
/ Typ
Max. Oper. Max. Interrupt Hold Current
/
Initial Resistance
/
One Hour Nom. Power
Voltage
/
Ratings
/
Post-Trip Dissipation
Restistance
/
Volts Volts Amps Amps Ohms Ohms Ohms Watts
at
at
/ bei
23 °C
at
/ bei
23 °C
at
/ bei
23 °C
at
/ bei
23 °C 650 V / 23 °C
max.
max.
I
h
min.
max.
max.
PFMT.013.250.2
60
250
3.0
0.13
6.5
12.0
20.0
3.3
PFMT.013.250.A.2
60
250
3.0
0.13
6.5
9.0
20.0
3.3
PFMT.013.250.B.2
60
250
3.0
0.13
9.0
12.0
20.0
3.3
PFMT.013.250.C.2
60
250
3.0
0.13
7.0
10.0
20.0
3.3
Maximum Package Body Temperature (220 °C)
Melting Temperature of Solder (183 °C)
2 Minutes or More
Preheat
Flux Activation
Reflow
Cool
10° to 20 C
per Second
Less than
120 °C per
Second
300
250
200
150
100
50
0
0 30 60 100 150 200 250
T
emperatur
e (°
C) /
T
Time (Seconde)
(s)
Packaged: Tape and reel: 2000 pcs. per reel