PolySwitch Telecommunication Resettable PTCs

Littelfuse PolySwitch Telecom Resettable PTCs are designed to protect against short-duration high-voltage fault currents typically found in telecom applications. These components help provide protection against damage caused by power cross and power induction surges, as well as help improve the reliability of customer premise and network equipment worldwide. Littelfuse PolySwitch Telecom Resettable PTCs are compatible with high-volume electronics assembly, assist in meeting regulatory equipment requirements, help improve line balance, and are applicable for legacy POTS and modern digital communications equipment. These devices are available in chip, surface-mount, or radial-leaded configurations.

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Description Datasheet Availability Pricing (CRC) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
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Termination Style
Hold Current
Maximum Voltage
Trip Current
Current Rating - Max
Resistance
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Maximum Operating Temperature
Lead Spacing
Packaging
Littelfuse Resettable Fuses - PPTC FTC 250V POLYFUSE SMD
Datasheet
70In Stock
4 500Expected 10/1/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 13 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 250/60V 0.13A PTC Vertical
Datasheet
182In Stock
6 000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1 200

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 13 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 0.15A 600V RADIAL
Datasheet
701In Stock
Min.: 1
Mult.: 1

600R PCB Mount Radial 150 mA 60 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 0.15A 600V RADIAL
Datasheet
1 637In Stock
Min.: 1
Mult.: 1

600R PCB Mount Radial 150 mA 60 VDC 300 mA 3 A 20 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC PTC 60V/600V.150A POLY TELECOM
Datasheet
101In Stock
1 200Expected 8/20/2026
Min.: 1
Mult.: 1
: 1 200

600R PCB Mount Radial 150 mA 60 VDC 300 mA 3 A 17 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC PTC 60V/600V.160A POLY TELECOM
Datasheet
15In Stock
1 000Expected 12/1/2026
Min.: 1
Mult.: 1
: 500

600R PCB Mount Radial 160 mA 60 VDC 320 mA 3 A 18 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC .15A 60Vdc600V Fuses Radial Lead Resetbl
Datasheet
615In Stock
Min.: 1
Mult.: 1

TR600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 22 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .15A 60Vdc 600V
Datasheet
1 049In Stock
Min.: 1
Mult.: 1
: 600

TR600 PCB Mount Radial 150 mA 250 VDC 300 mA 3 A 22 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 60V 3A 25Ohms
Datasheet
342In Stock
1 500Expected 12/1/2026
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 55 mA 60 VDC 170 mA 3 A 35 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .08A 60UDE MAX 250Vrms MAX
Datasheet
1 011In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 80 mA 60 VDC 160 mA 3 A 33 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC TRF250-110U-B-0.5-2
Datasheet
670In Stock
Min.: 1
Mult.: 1
: 1 500
TRF250 PCB Mount Radial 110 mA 60 V 220 mA 3 A 5 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 250V .12A-HD 3A MAX
Datasheet
2 604In Stock
Min.: 1
Mult.: 1
: 1 500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 V - 40 C+ 85 C
Datasheet
74In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 60Vdc MAX 250Vrms
Datasheet
500In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 250V .145A-HD 3A MAX
Datasheet
1 489In Stock
Min.: 1
Mult.: 1
: 1 500

TRF250 PCB Mount Radial 145 mA 60 VDC 290 mA 3 A 14 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC .18A 250V
Datasheet
1 893In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 180 mA 100 VDC 650 mA 10 A 4 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .18A 250V
Datasheet
2 599In Stock
Min.: 1
Mult.: 1
: 1 500

TRF250 PCB Mount Radial 180 mA 100 VDC 650 mA 10 A 4 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC Polyswitch 0.183A kinked
Datasheet
2 000In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 183 mA 100 VDC 685 mA 10 A 3.4 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC Polyswitch 0.183A straight
Datasheet
499In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 183 mA 100 VDC 685 mA 10 A 3.4 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 100Vdc 10Arms PolySwitch Reset Dev
Datasheet
523In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 184 mA 100 VDC 1 A 10 A 3.1 Ohms 0 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 250V
Datasheet
2 565In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 VDC - 40 C+ 85 C
Datasheet
363In Stock
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 600V .15A-HD 3A MAX
Datasheet
1 994In Stock
Min.: 1
Mult.: 1

TRF600 PCB Mount Radial 130 mA 250 VDC 300 mA 3 A 22 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .16A 250Vdc 600V RMS
Datasheet
600In Stock
Min.: 1
Mult.: 1
: 600

TRF600 PCB Mount Radial 160 mA 250 VDC 320 mA 3 A 18 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 60V 3A 1.45Ohms
Datasheet
605In Stock
Min.: 1
Mult.: 1

TRF600 PCB Mount Radial 400 mA 60 VDC 1 A 3 A 1.9 Ohms - 40 C + 85 C 5 mm Bulk