FUSES / SICHERUNGEN
Resettable fuses
PFRT
Typical Time to Trip at 23 ˚C
Wire leaded
PTC-Fuses
Type PFRT
100
High voltage surge
capabilities
Compliance to ITU
K.20/K.21 specifications
Agency recognition:
UL, CSA, TÜV
100
Time to trip (s)
10
PFRT.018.250.U
1
PFRT.014.250 & PFRT.014.250.U
PFRT.012.250 & PFRT.012.250.U
PFRT.011.250.U
0.10
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)
Typical Part Marking
Dimensions
A
E
Layout may vary
Manufacturer’s Trademark
Part identification
Restance bin
B
Date code (First digit = Last digit of
year; next three digits = day of year)
D
Lot No. (T = Taiwan, S = Xiamen)
C
Applications
Used as a secondary overcurrent 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
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 Ihold, Vmax 23 °C / 5-facher Haltestrom
Hold Current / Haltestrom
30 min. at Ihold / bei Haltestrom
Trip Cycle Life / Trip-Zyklen
Vmax, Imax, 100 cycles / Zyklen
Trip Endurance / Zeit im Tripzustand Vmax, 48 hours / Stunden
± 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
Accept/Reject Criteria
Per MF physical description
Rmin ≤ R ≤ Rmax
T ≤ max. time to trip
(sec.)
No trip
No arcing or burning
No arcing or burning
www.schurter.com
21
FUSES / SICHERUNGEN
Resettable fuses
PFRT
Electrical Characteristics
Type / Typ
Max. Oper.
Voltage /
Max. Interrupt
Ratings /
Volts
Volts
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
Amps
max.
250
250
250
250
250
250
250
250
60
60
60
60
60
60
60
60
Hold Current /
max.
3.0
3.0
3.0
3.0
3.0
3.0
3.0
10.0
Amps
at / bei 23 °C
Ih
0.08
0.08
0.11
0.12
0.12
0.14
0.14
0.18
Initial Resistance /
One Hour
Post-Trip
Resistance /
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
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)
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
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
RT .xxx .xxx .x
.x
.x
PTC-Fuse
Series
RT = Radial Leaded
Telecom Component
Hold Current, Ihold
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
Thermal Derating Chart-Ihold (Amps)
Type / Typ
PFRT.008.250
PFRT.011.250
PFRT.012.250
PFRT.014.250
PFRT.018.250
22
www.schurter.com
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
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