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 (EUR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Mounting Style
Termination Style
Hold Current
Maximum Voltage
Trip Current
Current Rating - Max
Resistance
Package/Case
Minimum Operating Temperature
Maximum Operating Temperature
Lead Spacing
Packaging
Littelfuse Resettable Fuses - PPTC .40A 60Vdc 600Vrms
Datasheet
2In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 200

TSM600 PCB Mount SMD/SMT 400 mA 250 VDC 1 A 3 A 2 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16 Ohms 3 A 60 VDC - 40 C+ 85 C
Datasheet
427In 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 0.12A 250V RADIAL
Datasheet
3.998Expected 6/15/2026
Min.: 1
Mult.: 1

250R PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC PTC 60V/250V.120A POLY TELECOM
Datasheet
1.200Expected 7/1/2026
Min.: 1
Mult.: 1
: 1.200

250R PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC .12A 60Vdc MAX 250Vrms
Datasheet
500Expected 5/25/2026
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 Polyswitch 0.183A kinked
Datasheet
2.500Expected 7/14/2026
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 .16A 250Vdc 600V RMS
Datasheet
600Expected 5/25/2026
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 PTC 60V/250V.120A POLY TELECOM
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 1
Mult.: 1
: 1.200

250R PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 14 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC PTC 60V/250V.180A POLY TELECOM
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1
: 1.000

250R PCB Mount Radial 180 mA 60 V 650 mA 10 A 4 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TCF250 PCB Mount SMD/SMT 100 mA 60 V 200 mA 3 A 24 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC .12A
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TCF250 PCB Mount SMD/SMT 120 mA 60 V 240 mA 3 A 18 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC .12A Fast Trip
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 120 mA 60 V 240 mA 3 A 18 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC .12A Fast Trip
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 120 mA 60 V 240 mA 3 A 18 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC .12A Fast Trip
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 120 mA 60 V 240 mA 3 A 18 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 2.500
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 145 mA 60 VDC 290 mA 3 A 14 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 2.500
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 145 mA 60 V 290 mA 3 A 14 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 2.500

TCF250 PCB Mount SMD/SMT 145 mA 60 V 290 mA 3 A 14 Ohms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC 60V 3A 8Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 500

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 8 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V 3A 8Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 10.000
Mult.: 500

TRF250 PCB Mount Radial 120 mA 60 V 240 mA 3 A 8 Ohms - 40 C + 85 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 250V
Datasheet
Non-Stocked Lead-Time 17 Weeks
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 250V .12A-HD 3A MAX
Datasheet
Non-Stocked Lead-Time 17 Weeks
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 .12A 250V
Datasheet
Non-Stocked Lead-Time 17 Weeks
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
Non-Stocked Lead-Time 17 Weeks
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 60V 3A 10Ohms
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1
: 1.500

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 10 Ohms - 40 C + 85 C 5 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC
Datasheet
Non-Stocked Lead-Time 17 Weeks
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