FUSES
/ SICHERUNGEN
Resettable fuses
Wire leaded
PTC-Fuses
Type PFRT
High voltage surge
capabilities
Compliance to ITU
K.20/K.21 specifications
Agency recognition:
UL, CSA, TÜV
Typical Time to Trip at 23 ˚C
100
PFRT
100
10
Time to trip
(s)
1
PFRT.018.250.U
0.10
PFRT.014.250 & PFRT.014.250.U
PFRT.012.250 & PFRT.012.250.U
PFRT.011.250.U
PFRT.008.250 & PFRT.008.250.U
0.01
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3
50
75
100
Fault current
(A)
Dimensions
A
Typical Part Marking
E
Layout may vary
Manufacturer’s Trademark
Part identification
B
Date code (First digit = Last digit of
year; next three digits = day of year)
Restance bin
Lot No. (T = Taiwan, S = Xiamen)
D
Applications
C
Used as a secondary overcur-
rent protection device in:
• Customer Premise Equipment
(CPE)
• Central Office (CO)
• Subscriber Line Interface
Cards (SLIC)
Environmental Characteristics
Operating/Storage Temperature
/ Einsatz/Lagertemp.
Maximum Device Surface Temperature in Tripped State
/
Passive Aging
/ passive Alterung
Humidity Aging
/ Feuchtigkeitsalterung
Thermal Shock
/ Thermischer Schock
Solvent Resistance
/ Lösungsmittel-Beständigkeit
Lead Solerability
/ Lötbarkeit
Flammability
/ Entflammbarkeit
Vibration
-45 °C
to
+85 °C
125 °C
+85 °C, 1000
hours
/ Std.
+60 °C, 1000
hours
/ Std.
+85 °C, 85% R.H. 500
hours
/ Std.
MIL-STD-202F, Method 107G
+125 °C/–55 °C, 10
times
/ Zyklen
MIL-STD-202, Method 215B
ANSI/J-STD-002
IEC 695-2-2
MIL-STD-883C, Method 2007.1,
Condition A
± 2%
typ. resist. change
± 3%
typ. resist. change
± 3%
typ. resist. change
±10%
typ. resist. change
±15%
typ. resist. change
No change
No Flame for 60 sec.
No change
Test Procedures And Requirements For Model PFRT Series
Test
/ Test
Test Conditions
/ Bedingungen
Visual/Mech.
/ visuell/mech.
Verify dimensions and materials
/ Kontrolle Abmess./Mat.
Resistance
/ Widerstand
In still air @ 23 °C
/ bei ruhiger Luft 23 °C
Time to Trip
/ Trip-Zeit
5 times I
hold
, V
max
23 °C
/ 5-facher Haltestrom
Hold Current
/ Haltestrom
30 min. at I
hold
/ bei Haltestrom
Trip Cycle Life
/ Trip-Zyklen
V
max
, I
max
, 100 cycles
/ Zyklen
Trip Endurance
/ Zeit im Tripzustand
V
max
, 48 hours
/ Stunden
Accept/Reject Criteria
Per MF physical description
R
min
≤
R
≤
R
max
T
≤
max.
time to trip
(sec.)
No trip
No arcing or burning
No arcing or burning
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21
FUSES
/ SICHERUNGEN
Resettable fuses
Electrical Characteristics
Type
/ Typ
Max. Oper.
Voltage
/
Max. Interrupt
Ratings
/
Hold Current
/
Initial Resistance
/
PFRT
One Hour
Post-Trip
Resistance
/
Volts
Volts
max.
250
250
250
250
250
250
250
250
Amps
max.
3.0
3.0
3.0
3.0
3.0
3.0
3.0
10.0
PFRT.008.250.U
PFRT.008.250
PFRT.011.250.U
PFRT.012.250
PFRT.012.250.U
PFRT.014.250
PFRT.014.250.U
PFRT.018.250.U
60
60
60
60
60
60
60
60
Amps
at
/ bei
23 °C
I
h
0.08
0.08
0.11
0.12
0.12
0.14
0.14
0.18
Ohms
Ohms
at
/ bei
23 °C
at
/ bei
23 °C
min.
max.
14.0
20.0
15.0
22.0
5.0
9.0
4.0
8.0
6.0
10.0
3.0
6.0
3.5
6.5
0.8
2.0
Ohms
at
/ bei
23 °C
33.0
33.0
16.0
16.0
16.0
12.0
12.0
4.0
Dimensions
Type
/ Typ
PFRT.008.250.U
PFRT.008.250
PFRT.011.250.U
PFRT.012.250
PFRT.012.250.U
PFRT.014.250
PFRT.014.250.U
PFRT.018.250.U
A
max.
4.8
(0.189)
5.3
(0.209)
5.3
(0.209)
6.5
(0.256)
6.0
(0.236)
6.5
(0.256)
6.0
(0.236)
6.0
(0.236)
B
max.
9.1
(0.358)
9.3
(0.366)
9.4
(0.370)
11.0
(0.433)
10.0
(0.394)
11.0
(0.433)
10.0
(0.394)
10.0
(0.394)
C
max.
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
D
nom.
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
E
nom.
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
5.0
(0.197)
Physical Characteristics
Style Lead Dia. Material
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
1
0.65
Sn/Cu
(0.026)
Dimensions in mm/inches
Packaging options: Bulk: 500 pcs. per bag, Tape and reel: 3000 pcs. per reel
How To Order
PF
PTC-Fuse
Series
RT = Radial Leaded
Telecom Component
Hold Current, I
hold
008-018 (0.08-018 Amps)
Max. Interrupt Voltage, V
250 (250 V)
Resistance Sorted
E = 7–12
Ω,
F = 6–10
Ω,
G = 6–9
Ω,
H = 8–10,5
Ω
.B =
Bare Disc
.U =
Uncoated Parts
- =
Bulk Packaging
.2 =
Tape & Reel
RT .xxx .xxx .x
.x
.x
Thermal Derating Chart-I
hold
(Amps)
Type
/ Typ
PFRT.008.250
PFRT.011.250
PFRT.012.250
PFRT.014.250
PFRT.018.250
Ambient Operating Temperature
–40 ˚C
–20 ˚C
0 ˚C
0.124
0.110
0.095
0.171
0.151
0.131
0.186
0.165
0.143
0.255
0.199
0.172
0.269
0.240
0.211
23 ˚C
0.080
0.110
0.120
0.145
0.180
40 ˚C
0.066
0.091
0.099
0.119
0.153
50 ˚C
0.059
0.081
0.088
0.106
0.138
60 ˚C
0.051
0.071
0.077
0.091
0.123
70 ˚C
0.044
0.061
0.066
0.080
0.109
85 ˚C
0.033
0.046
0.050
0.060
0.087
22
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