Resettable Fuses - PPTC

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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Mounting Style	Termination Style	Hold Current	Maximum Voltage	Trip Current	Current Rating - Max	Resistance	Minimum Operating Temperature	Maximum Operating Temperature	Lead Spacing	Packaging
Resettable Fuses - PPTC 7 Ohms 3 A 250 VDC - 40 C+ 85 C TRF600-250 Littelfuse 1: S/ 7.20 623In Stock 6,500On Order	Mfr. Part # TRF600-250 Mouser Part # 650-TRF600-250	Littelfuse	Resettable Fuses - PPTC 7 Ohms 3 A 250 VDC - 40 C+ 85 C Learn More about Littelfuse telecom ptcs	Datasheet	623In Stock 6,500On Order On Order Ship Dates Mfr. #: TRF600-250 Stock: 623 Can Ship Immediately On Order: 1,500 Expected 12/31/2026 5,000 Expected 1/25/2027 Factory Lead-Time: 17 Weeks	S/ 7.20 S/ 6.66 S/ 5.53 S/ 5.10 View S/ 4.59 S/ 4.16 S/ 3.40	Min.: 1 Mult.: 1	TRF600	PCB Mount	Radial	250 mA	250 VDC	850 mA	3 A	7 Ohms	- 40 C	+ 85 C	5 mm	Bulk
Resettable Fuses - PPTC 60V 3A 1.45Ohms TRF600-400 Littelfuse 1: S/ 5.02 585In Stock	Mfr. Part # TRF600-400 Mouser Part # 650-TRF600-400	Littelfuse	Resettable Fuses - PPTC 60V 3A 1.45Ohms Learn More about Littelfuse telecom ptcs	Datasheet	585In Stock	S/ 5.02 S/ 4.63 S/ 3.85 S/ 3.55 View S/ 3.19 S/ 2.93 S/ 2.81	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
Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2 TS250-130F-RA-2 Littelfuse 1: S/ 5.29 116In Stock	Mfr. Part # TS250-130F-RA-2 Mouser Part # 650-TS250-130F-RA-2	Littelfuse	Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2 Learn More about Littelfuse telecom ptcs	Datasheet	116In Stock	Cut Tape S/ 5.29 S/ 4.90 S/ 4.05 S/ 3.73 View Reel S/ 2.50 S/ 3.36 S/ 3.09 S/ 2.50 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	TS250	PCB Mount	SMD/SMT	130 mA	60 VDC	260 mA	3 A	15 Ohms	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
Resettable Fuses - PPTC 250V .250A-HD 3A MAX (R) TSM600-250F-RA-2 Littelfuse 1: S/ 32.58 105In Stock	Mfr. Part # TSM600-250F-RA-2 Mouser Part # 650-TSM600-250F-RA-2	Littelfuse	Resettable Fuses - PPTC 250V .250A-HD 3A MAX (R) Learn More about Littelfuse telecom ptcs	Datasheet	105In Stock	Cut Tape S/ 32.58 S/ 27.56 S/ 21.10 S/ 19.42 S/ 15.38 Reel S/ 15.38 MouseReel Available	Min.: 1 Mult.: 1 : 200	TSM600	PCB Mount	SMD/SMT	250 mA	250 VDC	860 mA	3 A	5 Ohms	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
Resettable Fuses - PPTC .40A 60Vdc 600Vrms TSM600-400F-2 Littelfuse 1: S/ 30.87 2In Stock	Mfr. Part # TSM600-400F-2 Mouser Part # 650-TSM600-400F-2	Littelfuse	Resettable Fuses - PPTC .40A 60Vdc 600Vrms Learn More about Littelfuse telecom ptcs	Datasheet	2In Stock	Cut Tape S/ 30.87 S/ 29.15 S/ 26.90 S/ 21.99 S/ 15.38 Reel S/ 15.38 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
Resettable Fuses - PPTC FTC 250V POLYFUSE SMD 250S130DR Littelfuse 1: S/ 4.24 3,920Expected 2/1/2027	Mfr. Part # 250S130DR Mouser Part # 576-250S130DR	Littelfuse	Resettable Fuses - PPTC FTC 250V POLYFUSE SMD Learn More about Littelfuse 250s polyfuse ptcs	Datasheet	3,920Expected 2/1/2027	Cut Tape S/ 4.24 S/ 3.62 S/ 3.16 S/ 2.91 Reel S/ 1.86 View S/ 2.62 S/ 2.41 S/ 1.84 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
Resettable Fuses - PPTC Polyswitch 0.26A TS250-130F-RB-2 Littelfuse 1: S/ 5.57 7,488Expected 11/16/2026	Mfr. Part # TS250-130F-RB-2 Mouser Part # 650-TS250-130F-RB-2	Littelfuse	Resettable Fuses - PPTC Polyswitch 0.26A Learn More about Littelfuse telecom ptcs	Datasheet	7,488Expected 11/16/2026	Cut Tape S/ 5.57 S/ 5.10 S/ 4.24 S/ 3.81 View Reel S/ 2.48 S/ 3.45 S/ 3.16 S/ 2.48 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	TS250	PCB Mount	SMD/SMT	130 mA	60 VDC	260 mA	3 A	20 Ohms	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
Resettable Fuses - PPTC 250V .250A-HD 3A MAX TSM600-250F-2 Littelfuse 1: S/ 33.13 1,800On Order	Mfr. Part # TSM600-250F-2 Mouser Part # 650-TSM600-250F-2	Littelfuse	Resettable Fuses - PPTC 250V .250A-HD 3A MAX Learn More about Littelfuse telecom ptcs	Datasheet	1,800On Order On Order Ship Dates Mfr. #: TSM600-250F-2 Stock: 0 On Order: 600 Expected 1/4/2027 1,200 Expected 1/11/2027 Factory Lead-Time: 17 Weeks	Cut Tape S/ 33.13 S/ 28.69 S/ 26.47 S/ 21.95 S/ 16.00 Reel S/ 15.10 MouseReel Available	Min.: 1 Mult.: 1 : 200	TSM600	PCB Mount	SMD/SMT	250 mA	250 VDC	860 mA	3 A	7 Ohms	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
Resettable Fuses - PPTC PTC 60V/250V.120A POLY TELECOM 250R120-RCZR Littelfuse 1: S/ 5.80 Non-Stocked Lead-Time 18 Weeks	Mfr. Part # 250R120-RCZR Mouser Part # 576-250R120-RCZR	Littelfuse	Resettable Fuses - PPTC PTC 60V/250V.120A POLY TELECOM Learn More about Littelfuse radial leaded pptcs	Datasheet	Non-Stocked Lead-Time 18 Weeks	S/ 5.80 S/ 5.29 S/ 4.44 S/ 4.09 View Reel S/ 2.60 S/ 3.67 S/ 3.39 S/ 2.60	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
Resettable Fuses - PPTC PTC 60V/250V.180A POLY TELECOM 250R180MR Littelfuse 1: S/ 3.89 Lead-Time 17 Weeks	Mfr. Part # 250R180MR Mouser Part # 576-250R180MR	Littelfuse	Resettable Fuses - PPTC PTC 60V/250V.180A POLY TELECOM Learn More about Littelfuse radial leaded pptcs	Datasheet	Lead-Time 17 Weeks	S/ 3.89 S/ 3.48 S/ 2.88 S/ 2.66 Reel S/ 1.79 View S/ 2.39 S/ 2.20 S/ 1.67	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
Resettable Fuses - PPTC TCF250-100T-B-0.5 Littelfuse 1: S/ 1.91 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-100T-B-0.5 Mouser Part # 650-TCF250-100TB0.5	Littelfuse	Resettable Fuses - PPTC Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.91 S/ 1.75 S/ 1.45 S/ 1.34 View S/ 1.21 S/ 1.11 S/ 0.965	Min.: 1 Mult.: 1	TCF250	PCB Mount	SMD/SMT	100 mA	60 V	200 mA	3 A	24 Ohms	- 40 C	+ 85 C		Bulk
Resettable Fuses - PPTC .12A TCF250-120 Littelfuse 1: S/ 2.92 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-120 Mouser Part # 650-TCF250-120	Littelfuse	Resettable Fuses - PPTC .12A Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 2.92 S/ 2.30 S/ 1.93 S/ 1.70 View S/ 1.53 S/ 1.41 S/ 1.30 S/ 1.11	Min.: 1 Mult.: 1	TCF250	PCB Mount	SMD/SMT	120 mA	60 V	240 mA	3 A	18 Ohms	- 40 C	+ 85 C		Bulk
Resettable Fuses - PPTC .12A Fast Trip TCF250-120T-B-0.5 Littelfuse 10,000: S/ 1.58 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-120T-B-0.5 Mouser Part # 650-TCF250-120T-B0.5	Littelfuse	Resettable Fuses - PPTC .12A Fast Trip Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.58	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
Resettable Fuses - PPTC .12A Fast Trip TCF250-120T-RA-B-0.5 Littelfuse 10,000: S/ 1.23 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-120T-RA-B-0.5 Mouser Part # 650-TCF250-120TRAB.5	Littelfuse	Resettable Fuses - PPTC .12A Fast Trip Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.23	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
Resettable Fuses - PPTC .12A Fast Trip TCF250-120T-RB-B-0.5 Littelfuse 10,000: S/ 1.17 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-120T-RB-B-0.5 Mouser Part # 650-TCF250-120TRBB.5	Littelfuse	Resettable Fuses - PPTC .12A Fast Trip Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.17	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
Resettable Fuses - PPTC TCF250-145 Littelfuse 2,500: S/ 1.24 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-145 Mouser Part # 650-TCF250-145	Littelfuse	Resettable Fuses - PPTC Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.24	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
Resettable Fuses - PPTC TCF250-145-RB-B-0.5 Littelfuse 2,500: S/ 1.23 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-145-RB-B-0.5 Mouser Part # 650-TCF250-145RBB0.5	Littelfuse	Resettable Fuses - PPTC Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.23	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
Resettable Fuses - PPTC TCF250-145T-B-0.5 Littelfuse 10,000: S/ 1.30 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TCF250-145T-B-0.5 Mouser Part # 650-TCF250-145TB0.5	Littelfuse	Resettable Fuses - PPTC Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.30	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
Resettable Fuses - PPTC 60V 3A 8Ohms TRF250-120-B-0.5 Littelfuse 10,000: S/ 1.60 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120-B-0.5 Mouser Part # 650-TRF250-120-B-0.5	Littelfuse	Resettable Fuses - PPTC 60V 3A 8Ohms Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.60	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
Resettable Fuses - PPTC 60V 3A 8Ohms TRF250-120S-B-0.5 Littelfuse 10,000: S/ 1.86 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120S-B-0.5 Mouser Part # 650-TRF250-120SB-0.5	Littelfuse	Resettable Fuses - PPTC 60V 3A 8Ohms Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 1.86	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
Resettable Fuses - PPTC .12A 250V TRF250-120T-2 Littelfuse 1: S/ 3.85 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120T-2 Mouser Part # 650-TRF250-120T-2	Littelfuse	Resettable Fuses - PPTC .12A 250V Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	Cut Tape S/ 3.85 S/ 3.53 S/ 2.93 S/ 2.69 View Reel S/ 1.65 S/ 2.41 S/ 2.23 S/ 1.65	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
Resettable Fuses - PPTC 250V .12A-HD 3A MAX TRF250-120T-B-0.5 Littelfuse 1: S/ 3.19 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120T-B-0.5 Mouser Part # 650-TRF250-120TB0.5	Littelfuse	Resettable Fuses - PPTC 250V .12A-HD 3A MAX Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 3.19 S/ 2.92 S/ 2.43 S/ 2.24 View S/ 2.01 S/ 1.85 S/ 1.71	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
Resettable Fuses - PPTC 16 Ohms 3 A 60 V - 40 C+ 85 C TRF250-120US Littelfuse 1: S/ 4.32 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120US Mouser Part # 650-TRF250-120US	Littelfuse	Resettable Fuses - PPTC 16 Ohms 3 A 60 V - 40 C+ 85 C Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 4.32 S/ 3.46 S/ 2.91 S/ 2.53 View S/ 2.27 S/ 1.91	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
Resettable Fuses - PPTC 60V 3A 10Ohms TRF250-120US-2 Littelfuse 1: S/ 3.08 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120US-2 Mouser Part # 650-TRF250-120US-2	Littelfuse	Resettable Fuses - PPTC 60V 3A 10Ohms Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	Cut Tape S/ 3.08 S/ 2.81 S/ 2.34 S/ 2.16 View Reel S/ 1.62 S/ 1.94 S/ 1.79 S/ 1.62	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
Resettable Fuses - PPTC TRF250-120UT Littelfuse 1: S/ 3.19 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # TRF250-120UT Mouser Part # 650-TRF250-120UT	Littelfuse	Resettable Fuses - PPTC Learn More about Littelfuse telecom ptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 3.19 S/ 2.95 S/ 2.44 S/ 2.26 View S/ 2.03 S/ 1.87 S/ 1.72 S/ 1.70	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