Littelfuse, Inc. Datasheets for Resettable PTCs

Resettable (polymeric or positive temperature coefficient -  PTC) fuses are unlike traditional fuses that have to be replaced after a fault condition, this may not be necessary when using resettable fuses. The internal resistance of the component increases in response to an overcurrent or a short-circuit condition, limiting subsequent disturbances. After the fault condition is removed, the device cools and the internal resistance drops to nearly its initial value, permitting normal equipment operation to resume.
Resettable PTCs: Learn more

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Product Name Notes
Surface Mount Resettable PTCs -- miniASMDC010F-2
Surface Mount Resettable PTCs -- miniASMDC014F-2
Surface Mount Resettable PTCs -- miniASMDC020F-2
Surface Mount Resettable PTCs -- miniASMDC030F-2
Surface Mount Resettable PTCs -- miniASMDC050F-2
Surface Mount Resettable PTCs -- MINIASMDC075F-2
Surface Mount Resettable PTCs -- miniASMDC075F/24-2
Surface Mount Resettable PTCs -- MINIASMDC075F/33-2
Surface Mount Resettable PTCs -- miniASMDC110F/16-2
Surface Mount Resettable PTCs -- miniASMDC110F/24-2
Surface Mount Resettable PTCs -- miniASMDC125F/16-2
Surface Mount Resettable PTCs -- MINIASMDC150F/12-2
Surface Mount Resettable PTCs -- miniASMDC150F/16-2
Surface Mount Resettable PTCs -- miniASMDC150F/24-2
Surface Mount Resettable PTCs -- MINIASMDC200F/16-2
Surface Mount Resettable PTCs -- MINIASMDC260F/12-2
Surface Mount Resettable PTCs -- MINIASMDC260F/13.2-2
Surface Mount Resettable PTCs -- miniASMDC260F/16-2
Surface Mount Resettable PTCs -- NANOASMDC010F-2
Surface Mount Resettable PTCs -- nanoASMDC012F-2
Surface Mount Resettable PTCs -- nanoASMDC016F-2
Surface Mount Resettable PTCs -- nanoASMDC020F-2
Surface Mount Resettable PTCs -- nanoASMDC025F-2
Surface Mount Resettable PTCs -- nanoASMDC035F-2
Surface Mount Resettable PTCs -- NANOASMDC050F/13.2-2
Helping to reduce weight of wire harnesses. PPTC devices distributed in a circuit can allow the use of smaller wire sizes with the resulting harnesses. Forego looping back and forth...
Telecom Resettable PTCs -- TCF250-100T-B-0.5
Telecom Resettable PTCs -- TCF250-120
Telecom Resettable PTCs -- TCF250-120T-B-0.5
Telecom Resettable PTCs -- TCF250-120T-RA-B-0.5
Telecom Resettable PTCs -- TCF250-120T-RB-B-0.5
Telecom Resettable PTCs -- TCF250-145
Telecom Resettable PTCs -- TCF250-145-RB-B-0.5
Telecom Resettable PTCs -- TCF250-145T-B-0.5
Telecom Resettable PTCs -- TCF250-180T
Telecom Resettable PTCs -- TR600-150F-EX
Telecom Resettable PTCs -- TR600-150F-EX-2
Telecom Resettable PTCs -- TRF250-055T
Telecom Resettable PTCs -- TRF250-055UT
Telecom Resettable PTCs -- TRF250-080T
Telecom Resettable PTCs -- TRF250-080U
Telecom Resettable PTCs -- TRF250-110U
Telecom Resettable PTCs -- TRF250-110U-B-0.5-2
Telecom Resettable PTCs -- TRF250-120
Telecom Resettable PTCs -- TRF250-120-2
Telecom Resettable PTCs -- TRF250-120-B-0.5
Telecom Resettable PTCs -- TRF250-120S-B-0.5
Telecom Resettable PTCs -- TRF250-120T
Telecom Resettable PTCs -- TRF250-120T-2
Telecom Resettable PTCs -- TRF250-120T-B-0.5
Telecom Resettable PTCs -- TRF250-120T-R1-B-0.5
Telecom Resettable PTCs -- TRF250-120T-R2-B-0.5
Telecom Resettable PTCs -- TRF250-120T-R2-B-0.5-2
Telecom Resettable PTCs -- TRF250-120T-RA-B-0.5
Telecom Resettable PTCs -- TRF250-120T-RC-B-0.5
Telecom Resettable PTCs -- TRF250-120T-RF-B-0.5
Telecom Resettable PTCs -- TRF250-120T-RF-B-0.5-2
Telecom Resettable PTCs -- TRF250-120T-RH-B-0.5
Telecom Resettable PTCs -- TRF250-120U
Telecom Resettable PTCs -- TRF250-120U-2
Telecom Resettable PTCs -- TRF250-120US
Telecom Resettable PTCs -- TRF250-120US-2
Telecom Resettable PTCs -- TRF250-120UT
Telecom Resettable PTCs -- TRF250-145
Telecom Resettable PTCs -- TRF250-145-2
Telecom Resettable PTCs -- TRF250-145-B-0.5
Telecom Resettable PTCs -- TRF250-145-RA-B-0.5
Telecom Resettable PTCs -- TRF250-145T
Telecom Resettable PTCs -- TRF250-145T-2
Telecom Resettable PTCs -- TRF250-145T-B-0.5
Telecom Resettable PTCs -- TRF250-145U
Telecom Resettable PTCs -- TRF250-145U-2
Telecom Resettable PTCs -- TRF250-145US
Telecom Resettable PTCs -- TRF250-145US-B-0.5
Telecom Resettable PTCs -- TRF250-180
Telecom Resettable PTCs -- TRF250-180-2
Telecom Resettable PTCs -- TRF250-180-AP
Telecom Resettable PTCs -- TRF250-183
Telecom Resettable PTCs -- TRF250-183-2
Telecom Resettable PTCs -- TRF250-183S
Telecom Resettable PTCs -- TRF250-183S-2
Telecom Resettable PTCs -- TRF250-183U
Telecom Resettable PTCs -- TRF250-183US
Telecom Resettable PTCs -- TRF250-184
Telecom Resettable PTCs -- TRF600-150
Telecom Resettable PTCs -- TRF600-150-2
Telecom Resettable PTCs -- TRF600-150-B-0.5
Telecom Resettable PTCs -- TRF600-150-B-0.5-2
Telecom Resettable PTCs -- TRF600-150-RB
Telecom Resettable PTCs -- TRF600-150-RB-2
Telecom Resettable PTCs -- TRF600-150-RB-B-0.5
Telecom Resettable PTCs -- TRF600-150S
Telecom Resettable PTCs -- TRF600-150S-2
Telecom Resettable PTCs -- TRF600-160
Telecom Resettable PTCs -- TRF600-160-1
Telecom Resettable PTCs -- TRF600-160-2
Telecom Resettable PTCs -- TRF600-160-RA
Telecom Resettable PTCs -- TRF600-160-RA-B-0.5
Telecom Resettable PTCs -- TRF600-250
Telecom Resettable PTCs -- TRF600-400
Telecom Resettable PTCs -- TS250-130F-2
Telecom Resettable PTCs -- TS250-130F-B-0.5-2
Telecom Resettable PTCs -- TS250-130F-RA-2
Telecom Resettable PTCs -- TS250-130F-RB-2
Telecom Resettable PTCs -- TS250-130F-RC-B-0.5-2
Telecom Resettable PTCs -- TS600-170F-2
Telecom Resettable PTCs -- TS600-200F-RA-B-0.5-2
Telecom Resettable PTCs -- TS600-400F-2
Telecom Resettable PTCs -- TSL250-080F-2
Telecom Resettable PTCs -- TSL250-080F-B-0.5-2
Telecom Resettable PTCs -- TSL250-130F-2
Telecom Resettable PTCs -- TSM600-250F-2
Telecom Resettable PTCs -- TSM600-250F-RA-2
Telecom Resettable PTCs -- TSM600-400F-2
Telecom Resettable PTCs -- TSV250-130F-2
Telecom Resettable PTCs -- TSV250-130F-B-0.5
Telecom Resettable PTCs -- TSV250-130F-B-0.5-2
Telecom Resettable PTCs -- TSV250-184F-2
Our PolySwitch families of telecommunications and networking devices help meet the growing demand for resettable overcurrent protection. These product families help provide protection against damage caused by power cross and...
Telecom Resettable PTCs -- 250R080
Telecom Resettable PTCs -- 250R080T
Telecom Resettable PTCs -- 250R120
Telecom Resettable PTCs -- 250R120-R1
Telecom Resettable PTCs -- 250R120-R2
Telecom Resettable PTCs -- 250R120-R3
Telecom Resettable PTCs -- 250R120-RA
Telecom Resettable PTCs -- 250R120-RC
Telecom Resettable PTCs -- 250R120-RF
Telecom Resettable PTCs -- 250R120T
Telecom Resettable PTCs -- 250R145
Telecom Resettable PTCs -- 250R145-RA
Telecom Resettable PTCs -- 250R145-RB
Telecom Resettable PTCs -- 250R145T
Telecom Resettable PTCs -- 250R180
Telecom Resettable PTCs -- 250R180T
The 250R series is designed to protect against short duration high voltage fault currents (power cross or power induction surge) typically found in telecom applications (250Vrms). The series can be...
Telecom Resettable PTCs -- 250S130
Telecom Resettable PTCs -- 250S130-RA
Telecom Resettable PTCs -- 250S130-RB
Telecom Resettable PTCs -- 250S130-RC
Telecom Resettable PTCs -- 250S130V
The 250S High Voltage Radial devices (HVR), a polymer-based PTC device, is suitable to protect telephony equipment against lightning and power cross strike, that is fully compatible with telecommunications standards.
Telecom Resettable PTCs -- 600R150
Telecom Resettable PTCs -- 600R150-RA
Telecom Resettable PTCs -- 600R150-RB
Telecom Resettable PTCs -- 600R160
Telecom Resettable PTCs -- 600R160-R1
Telecom Resettable PTCs -- 600R160-RA
The 600R series is designed to protect against power fault events typically found in telecom applications. This series is designed to be used in applications that need to meet the...
Surface Mount Resettable PTCs -- NANOASMDCH035F-2
Surface Mount Resettable PTCs -- PICOASMDCH010F-2
The Automotive High Temperature SMD is the first miniature-sized High Temperature PPTC series from Littelfuse with AEC-Q200 qualification for Automotive Applications and it provides surface mount overcurrent protection for applications...
Surface Mount Resettable PTCs -- MICROSMDCH050F-02
Surface Mount Resettable PTCs -- NANOSMDCH010F-02
Surface Mount Resettable PTCs -- NANOSMDCH030F/24-02
Surface Mount Resettable PTCs -- NANOSMDH075F-02
Surface Mount Resettable PTCs -- SMDCH125F/24-02
The High Temperature SMD is the High Temperature PPTC series from Littelfuse for Industrial and Automotive Applications. It provides surface mount overcurrent protection for applications where space is a prime...
Surface Mount Resettable PTCs -- microSMDCH010F-02
Surface Mount Resettable PTCs -- microSMDCH050F-02
The microSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- miniSMDC010F-2
Surface Mount Resettable PTCs -- miniSMDC014F-2
Surface Mount Resettable PTCs -- miniSMDC020F-2
Surface Mount Resettable PTCs -- miniSMDC030F-2
Surface Mount Resettable PTCs -- miniSMDC050F-2
Surface Mount Resettable PTCs -- miniSMDC075F-2
Surface Mount Resettable PTCs -- miniSMDC075F/24-2
Surface Mount Resettable PTCs -- miniSMDC075F/33-2
Surface Mount Resettable PTCs -- miniSMDC110F-2
Surface Mount Resettable PTCs -- miniSMDC110F/16-2
Surface Mount Resettable PTCs -- miniSMDC110F/24-2
Surface Mount Resettable PTCs -- miniSMDC125F-2
Surface Mount Resettable PTCs -- miniSMDC125F/16-2
Surface Mount Resettable PTCs -- miniSMDC150F-2
Surface Mount Resettable PTCs -- miniSMDC150F/12-2
Surface Mount Resettable PTCs -- miniSMDC150F/16-2
Surface Mount Resettable PTCs -- miniSMDC150F/24-2
Surface Mount Resettable PTCs -- miniSMDC160F-2
Surface Mount Resettable PTCs -- miniSMDC200F-2
Surface Mount Resettable PTCs -- miniSMDC200F/16-2
Surface Mount Resettable PTCs -- miniSMDC260F-2
Surface Mount Resettable PTCs -- miniSMDC260F/12-2
Surface Mount Resettable PTCs -- miniSMDC260F/13.2-2
Surface Mount Resettable PTCs -- miniSMDC260F/16-2
Surface Mount Resettable PTCs -- miniSMDC300F-2
The miniSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- nanoSMD200LR
Surface Mount Resettable PTCs -- nanoSMD270LR
Surface Mount Resettable PTCs -- nanoSMDC010F-2
Surface Mount Resettable PTCs -- nanoSMDC012F-2
Surface Mount Resettable PTCs -- nanoSMDC016F-2
Surface Mount Resettable PTCs -- nanoSMDC020F-2
Surface Mount Resettable PTCs -- nanoSMDC025F-2
Surface Mount Resettable PTCs -- nanoSMDC035F-2
Surface Mount Resettable PTCs -- nanoSMDC050F/13.2-2
Surface Mount Resettable PTCs -- nanoSMDC075F-2
Surface Mount Resettable PTCs -- nanoSMDC110F-2
Surface Mount Resettable PTCs -- nanoSMDC150F-2
Surface Mount Resettable PTCs -- nanoSMDC200F-2
Surface Mount Resettable PTCs -- nanoSMDCH010F-02
Surface Mount Resettable PTCs -- nanoSMDH075F-02
The nanoSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- PICOASMDC010S-2
Surface Mount Resettable PTCs -- PICOASMDC012S-2
The picoASMD is the first small-sized 0805 PPTC series from Littelfuse with AEC-Q200 qualification for Automotive Applications and it provides surface mount overcurrent protection for applications where space is a...
Surface Mount Resettable PTCs -- picoSMDC010S-2
Surface Mount Resettable PTCs -- picoSMDC012S-2
Surface Mount Resettable PTCs -- picoSMDC020S-2
Surface Mount Resettable PTCs -- picoSMDC035S-2
Surface Mount Resettable PTCs -- picoSMDC050S-2
Surface Mount Resettable PTCs -- picoSMDC075S-2
Surface Mount Resettable PTCs -- picoSMDC110S-2
The picoSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- SMD030F-2
Surface Mount Resettable PTCs -- SMD030F-2018-2
Surface Mount Resettable PTCs -- SMD050F-2
Surface Mount Resettable PTCs -- SMD075F-2
Surface Mount Resettable PTCs -- SMD075F/60-2
Surface Mount Resettable PTCs -- SMD100F-2
Surface Mount Resettable PTCs -- SMD100F-2018-2
Surface Mount Resettable PTCs -- SMD100F/33-2
Surface Mount Resettable PTCs -- SMD125F-2
Surface Mount Resettable PTCs -- SMD150F-2
Surface Mount Resettable PTCs -- SMD150F-2018-2
Surface Mount Resettable PTCs -- SMD150F/33-2
Surface Mount Resettable PTCs -- SMD150F/33-2920-2
Surface Mount Resettable PTCs -- SMD185F-2
Surface Mount Resettable PTCs -- SMD200F-2
Surface Mount Resettable PTCs -- SMD200F-2018-2
Surface Mount Resettable PTCs -- SMD200F/24-2920-2
Surface Mount Resettable PTCs -- SMD250F-2
Surface Mount Resettable PTCs -- SMD250F/15-2920-2
Surface Mount Resettable PTCs -- SMD260F-2
Surface Mount Resettable PTCs -- SMD300F-2
Surface Mount Resettable PTCs -- SMD300F/15-2
Surface Mount Resettable PTCs -- SMDH120-2
Surface Mount Resettable PTCs -- SMDH160-2
The SMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- SMDC030F-2
Surface Mount Resettable PTCs -- SMDC050F-2
Surface Mount Resettable PTCs -- SMDC075F-2
Surface Mount Resettable PTCs -- SMDC125F/33-2
Surface Mount Resettable PTCs -- SMDC185F/33-2
Surface Mount Resettable PTCs -- SMDC300F/24-2
Surface Mount Resettable PTCs -- SMDC310F/18-02
Surface Mount Resettable PTCs -- SMDCH125F/24-02
The SMDC series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...

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