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
Battery Strap Resettable PTCs -- LR4-1300SSF
Battery Strap Resettable PTCs -- LR4-190F
Battery Strap Resettable PTCs -- LR4-260F
Battery Strap Resettable PTCs -- LR4-380F
Battery Strap Resettable PTCs -- LR4-380XF
Battery Strap Resettable PTCs -- LR4-450F
Battery Strap Resettable PTCs -- LR4-550F
Battery Strap Resettable PTCs -- LR4-600F
Battery Strap Resettable PTCs -- LR4-600XF
Battery Strap Resettable PTCs -- LR4-730F
Battery Strap Resettable PTCs -- LR4-900F
Battery Strap Resettable PTCs -- MGP420D
Battery Strap Resettable PTCs -- MGP500
Battery Strap Resettable PTCs -- MXP180
Battery Strap Resettable PTCs -- MXP190BB
Battery Strap Resettable PTCs -- MXP250K
Battery Strap Resettable PTCs -- MXP270
Battery Strap Resettable PTCs -- MXP370BD
Battery Strap Resettable PTCs -- RSD310
Battery Strap Resettable PTCs -- RSD370
Battery Strap Resettable PTCs -- RSD420
Battery Strap Resettable PTCs -- SRP120F
Battery Strap Resettable PTCs -- SRP175F
Battery Strap Resettable PTCs -- SRP200F
Battery Strap Resettable PTCs -- SRP350F
Battery Strap Resettable PTCs -- SRP420F
Battery Strap Resettable PTCs -- VLP120UF
Battery Strap Resettable PTCs -- VLP175UAF
Battery Strap Resettable PTCs -- VLP220F
Battery Strap Resettable PTCs -- VLP270F
Battery Strap Resettable PTCs -- VLR170F
Battery Strap Resettable PTCs -- VLR175F
Battery Strap Resettable PTCs -- VLR175LF
Battery Strap Resettable PTCs -- VLR230F
Battery Strap Resettable PTCs -- VTP110F
Battery Strap Resettable PTCs -- VTP170F
Battery Strap Resettable PTCs -- VTP170XSF
Battery Strap Resettable PTCs -- VTP175F
Battery Strap Resettable PTCs -- VTP175LF
Battery Strap Resettable PTCs -- VTP210GF
Battery Strap Resettable PTCs -- VTP210SF
As a pioneer of polymeric positive temperature coefficient resettable devices, Littelfuse has developed several material platforms to serve the changing battery technology and to help protect battery applications. Each of...
Bladed Devices Resettable PTCs -- BD280-1130-10/16
Bladed Devices Resettable PTCs -- BD280-1130-15/16
Bladed Devices Resettable PTCs -- BD280-1130-20/16
Bladed Devices Resettable PTCs -- BD280-1927-25/16-W
Bladed Devices Resettable PTCs -- BD280-1927-30/16-W
Bladed Devices Resettable PTCs -- BD540-30
Radial Leaded Resettable PTCs -- AGRF1000
Radial Leaded Resettable PTCs -- AGRF1000-2
Radial Leaded Resettable PTCs -- AGRF1100
Radial Leaded Resettable PTCs -- AGRF1100-2
Radial Leaded Resettable PTCs -- AGRF1200
Radial Leaded Resettable PTCs -- AGRF1200-2
Radial Leaded Resettable PTCs -- AGRF1400
Radial Leaded Resettable PTCs -- AGRF1400-2
Radial Leaded Resettable PTCs -- AGRF400
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...
Low Resistance Resettable PTCs -- 0402L010SL
Low Resistance Resettable PTCs -- 0402L035SL
Low Resistance Resettable PTCs -- 0402L050SL
Low Resistance Resettable PTCs -- 0603L050SL
Low Resistance Resettable PTCs -- 0603L075SL
Low Resistance Resettable PTCs -- 0603L100SL
Low Resistance Resettable PTCs -- 0603L150SL
Low Resistance Resettable PTCs -- 0603L175SL
Low Resistance Resettable PTCs -- 0805L075SL
Low Resistance Resettable PTCs -- 0805L110SL
Low Resistance Resettable PTCs -- 0805L150SL
Low Resistance Resettable PTCs -- 0805L175SL
Low Resistance Resettable PTCs -- 0805L200SLTH
Low Resistance Resettable PTCs -- 0805L260SLTH
Low Resistance Resettable PTCs -- 0805L300SL
Low Resistance Resettable PTCs -- 1206L075SL
Low Resistance Resettable PTCs -- 1206L110/12SL
Low Resistance Resettable PTCs -- 1206L110SL
Low Resistance Resettable PTCs -- 1206L150/12SL
Low Resistance Resettable PTCs -- 1206L150SL
Low Resistance Resettable PTCs -- 1206L175SL
Low Resistance Resettable PTCs -- 1206L200SL
Low Resistance Resettable PTCs -- 1206L260SLTH
Low Resistance Resettable PTCs -- 1206L300SLTH
Low Resistance Resettable PTCs -- 1206L350SLTH
Low Resistance Resettable PTCs -- 1206L380SLTH
Low Resistance Resettable PTCs -- 1206L400SL
Low Resistance Resettable PTCs -- 1206L450SL
Low Resistance Resettable PTCs -- 1210L175SL
Low Resistance Resettable PTCs -- 1210L200SL
Low Resistance Resettable PTCs -- 1210L260SL
Low Resistance Resettable PTCs -- 1210L300SL
Low Resistance Resettable PTCs -- 1210L350SL
Low Resistance Resettable PTCs -- 1210L380SL
Low Resistance Resettable PTCs -- 1210L400SL
Low Resistance Resettable PTCs -- 1210L450SL
Low Resistance Resettable PTCs -- 1812L190SL
Low Resistance Resettable PTCs -- 1812L260SL
Low Resistance Resettable PTCs -- 1812L270SL
Low Resistance Resettable PTCs -- 1812L300SL
Low Resistance Resettable PTCs -- 1812L350SL
Low Resistance Resettable PTCs -- 1812L370SL
Low Resistance Resettable PTCs -- 2920L700SL
LoRho Surface Mount PPTC Resettable Fuse Series provides fast overcurrent protection with ultra-low internal resistance, voltage drop and power dissipation The POLY-FUSE LoRho Surface Mount Resettable PPTC Resettable Fuse series...
Line Voltage Rated Devices Resettable PTCs -- LVB125 PolySwitch line-voltage rated (LVR and LVB) devices help protect electric motors and transformers used in commercial home appliances from damage caused by mechanical overloads, overheating, stall, lost neutral, and other...
Line Voltage Rated Devices Resettable PTCs -- LVR005NK
Line Voltage Rated Devices Resettable PTCs -- LVR005NK-2
Line Voltage Rated Devices Resettable PTCs -- LVR005NS
Line Voltage Rated Devices Resettable PTCs -- LVR005NS-1
Line Voltage Rated Devices Resettable PTCs -- LVR005NS-2
Line Voltage Rated Devices Resettable PTCs -- LVR008NK
Line Voltage Rated Devices Resettable PTCs -- LVR008NK-2
Line Voltage Rated Devices Resettable PTCs -- LVR008NS
Line Voltage Rated Devices Resettable PTCs -- LVR008NS-1
Line Voltage Rated Devices Resettable PTCs -- LVR008NS-2
Line Voltage Rated Devices Resettable PTCs -- LVR012K
Line Voltage Rated Devices Resettable PTCs -- LVR012K-2
Line Voltage Rated Devices Resettable PTCs -- LVR012S
Line Voltage Rated Devices Resettable PTCs -- LVR012S-1
Line Voltage Rated Devices Resettable PTCs -- LVR012S-2
Line Voltage Rated Devices Resettable PTCs -- LVR016K
Line Voltage Rated Devices Resettable PTCs -- LVR016K-2
Line Voltage Rated Devices Resettable PTCs -- LVR016S
Line Voltage Rated Devices Resettable PTCs -- LVR016S-1
Line Voltage Rated Devices Resettable PTCs -- LVR016S-2
Line Voltage Rated Devices Resettable PTCs -- LVR025K
Line Voltage Rated Devices Resettable PTCs -- LVR025K-2
Line Voltage Rated Devices Resettable PTCs -- LVR025S
Line Voltage Rated Devices Resettable PTCs -- LVR025S-1
Line Voltage Rated Devices Resettable PTCs -- LVR025S-2
Line Voltage Rated Devices Resettable PTCs -- LVR033K
Line Voltage Rated Devices Resettable PTCs -- LVR033K-2
Line Voltage Rated Devices Resettable PTCs -- LVR033S
Line Voltage Rated Devices Resettable PTCs -- LVR033S-2
Line Voltage Rated Devices Resettable PTCs -- LVR040K
Line Voltage Rated Devices Resettable PTCs -- LVR040K-2
Line Voltage Rated Devices Resettable PTCs -- LVR040S
Line Voltage Rated Devices Resettable PTCs -- LVR040S-1
Line Voltage Rated Devices Resettable PTCs -- LVR040S-2
Line Voltage Rated Devices Resettable PTCs -- LVR055K
Line Voltage Rated Devices Resettable PTCs -- LVR055K-2
Line Voltage Rated Devices Resettable PTCs -- LVR055S
Line Voltage Rated Devices Resettable PTCs -- LVR055S-1
Line Voltage Rated Devices Resettable PTCs -- LVR075K-1
Line Voltage Rated Devices Resettable PTCs -- LVR075K-240
Line Voltage Rated Devices Resettable PTCs -- LVR075S
Line Voltage Rated Devices Resettable PTCs -- LVR075S-1
Line Voltage Rated Devices Resettable PTCs -- LVR075S-2
Line Voltage Rated Devices Resettable PTCs -- LVR075S-240
Line Voltage Rated Devices Resettable PTCs -- LVR100K-240
Line Voltage Rated Devices Resettable PTCs -- LVR100K-240-2
Line Voltage Rated Devices Resettable PTCs -- LVR100S
Line Voltage Rated Devices Resettable PTCs -- LVR100S-240
Line Voltage Rated Devices Resettable PTCs -- LVR100S-240-2
Line Voltage Rated Devices Resettable PTCs -- LVR125K-240
Line Voltage Rated Devices Resettable PTCs -- LVR125S
Line Voltage Rated Devices Resettable PTCs -- LVR125S-240
Line Voltage Rated Devices Resettable PTCs -- LVR200K-240
Line Voltage Rated Devices Resettable PTCs -- LVR200S
Line Voltage Rated Devices Resettable PTCs -- LVR200S-240
PolySwitch line-voltage rated (LVR) devices help protect electric motors and transformers used in commercial home appliances from damage caused by mechanical overloads, overheating, stall, lost neutral, and other potentially harmful...
Radial Leaded Resettable PTCs -- 16R1000G
Radial Leaded Resettable PTCs -- 16R1100G
Radial Leaded Resettable PTCs -- 16R1200G
Radial Leaded Resettable PTCs -- 16R1400G
Radial Leaded Resettable PTCs -- 16R250G
Radial Leaded Resettable PTCs -- 16R300G
Radial Leaded Resettable PTCs -- 16R400G
Radial Leaded Resettable PTCs -- 16R500G
Radial Leaded Resettable PTCs -- 16R600G
Radial Leaded Resettable PTCs -- 16R700G
Radial Leaded Resettable PTCs -- 16R800G
Radial Leaded Resettable PTCs -- 16R900G
The 16R series radial leaded device is designed to provide overcurrent protection for USB applications where space is not a concern and with a maximum 40A short circuit rating. Features...
Radial Leaded Resettable PTCs -- 30R090
Radial Leaded Resettable PTCs -- 30R110
Radial Leaded Resettable PTCs -- 30R135
Radial Leaded Resettable PTCs -- 30R160
Radial Leaded Resettable PTCs -- 30R185
Radial Leaded Resettable PTCs -- 30R250
Radial Leaded Resettable PTCs -- 30R300
Radial Leaded Resettable PTCs -- 30R400
Radial Leaded Resettable PTCs -- 30R500
Radial Leaded Resettable PTCs -- 30R600
Radial Leaded Resettable PTCs -- 30R700
Radial Leaded Resettable PTCs -- 30R800
Radial Leaded Resettable PTCs -- 30R900
The 30R series radial leaded device is designed to provide overcurrent protection for low voltage (?30V) applications where space is not a concern and resettable protection is preferred. Features: RoHS...
Radial Leaded Resettable PTCs -- 60R010
Radial Leaded Resettable PTCs -- 60R017
Radial Leaded Resettable PTCs -- 60R020
Radial Leaded Resettable PTCs -- 60R025
Radial Leaded Resettable PTCs -- 60R030
Radial Leaded Resettable PTCs -- 60R040
Radial Leaded Resettable PTCs -- 60R050
Radial Leaded Resettable PTCs -- 60R065
Radial Leaded Resettable PTCs -- 60R075
Radial Leaded Resettable PTCs -- 60R090
Radial Leaded Resettable PTCs -- 60R110
Radial Leaded Resettable PTCs -- 60R135
Radial Leaded Resettable PTCs -- 60R160
Radial Leaded Resettable PTCs -- 60R185
Radial Leaded Resettable PTCs -- 60R250
Radial Leaded Resettable PTCs -- 60R300
Radial Leaded Resettable PTCs -- 60R375
The 60R series radial leaded device is designed to provide overcurrent protection for (?60V) applications where space is not a concern and resettable protection is preferred. Features RoHS compliant and...
Radial Leaded Resettable PTCs -- 72R020X
Radial Leaded Resettable PTCs -- 72R025X
Radial Leaded Resettable PTCs -- 72R030X
Radial Leaded Resettable PTCs -- 72R040X
Radial Leaded Resettable PTCs -- 72R050X
Radial Leaded Resettable PTCs -- 72R065X
Radial Leaded Resettable PTCs -- 72R075X
Radial Leaded Resettable PTCs -- 72R090X
Radial Leaded Resettable PTCs -- 72R110X
Radial Leaded Resettable PTCs -- 72R135X
Radial Leaded Resettable PTCs -- 72R160X
Radial Leaded Resettable PTCs -- 72R185X
Radial Leaded Resettable PTCs -- 72R250X
Radial Leaded Resettable PTCs -- 72R300X
Radial Leaded Resettable PTCs -- 72R375X
The 72R Series is designed to provide overcurrent protection to 72Vdc maximum voltage with a maximum 40A short circuit rating. Features: RoHS compliant and lead-free 72Vdc Max Voltage w/max 40A...
Low Resistance Resettable PTCs -- 400CC1206LR-C
Low Resistance Resettable PTCs -- 450CC1210LR-C
Low Resistance Resettable PTCs -- microSMD450LR-C-2
Low Resistance Resettable PTCs -- nanoSMD350LR-C-2
Low Resistance Resettable PTCs -- nanoSMD400LR-C-2
The Littelfuse LoRho SMD PTC for Charging Cables provides protection from heat generated due to faults within the connector such as USB-C, microUSB, and many others. As connectors get smaller,...
Low Resistance Resettable PTCs -- microSMD350LR-D-2
Low Resistance Resettable PTCs -- microSMD380LR-2
Low Resistance Resettable PTCs -- microSMD400LR-2
Low Resistance Resettable PTCs -- microSMD500LR-2
Low Resistance Resettable PTCs -- microSMD550LR-2
Low Resistance Resettable PTCs -- microSMD600LR-2
Low Resistance Resettable PTCs -- nanoSMD200LR-2
Low Resistance Resettable PTCs -- nanoSMD270LR-2
Low Resistance Resettable PTCs -- nanoSMD380LR-2
Low Resistance Resettable PTCs -- nanoSMD400LR-2
Low Resistance Resettable PTCs -- nanoSMD450LR-2
Low Resistance Resettable PTCs -- nanoSMD550LR-2
Low Resistance Resettable PTCs -- nanoSMD600LR-2
The low resistivity SMD (surface-mount device) series is well suited to space-constrained mobile applications. The devices can help provide both overcurrent and overtemperature protection for battery pack PCMs (protection circuit...
Low Resistance Resettable PTCs -- microSMD190LR-2
Low Resistance Resettable PTCs -- microSMD200LR-2
Low Resistance Resettable PTCs -- microSMD250LR-A-2
Low Resistance Resettable PTCs -- microSMD350LR-2
Low Resistance Resettable PTCs -- microSMD450LR-2
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...
Low Resistance Resettable PTCs -- nanoSMD175LR-2
Low Resistance Resettable PTCs -- nanoSMD350LR-2
Low Resistance Resettable PTCs -- nanoSMD500LR-2
Low Resistance Resettable PTCs -- nanoSMD500LR-D-2
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...
Low Resistance Resettable PTCs -- 0402L020SL The POLY-FUSE LoRho Surface Mount Resettable PPTC Resettable Fuse series is designed for high speed overcurrent protection against fault current surges in applications that demand ultra-low internal resistance, ultra-low voltage...
Radial Leaded Resettable PTCs -- 06R075B
Radial Leaded Resettable PTCs -- 06R120B
Radial Leaded Resettable PTCs -- 06R155B
Radial Leaded Resettable PTCs -- 16R090B
Radial Leaded Resettable PTCs -- 16R110B
Radial Leaded Resettable PTCs -- 16R135B
Radial Leaded Resettable PTCs -- 16R160B
Radial Leaded Resettable PTCs -- 16R185B
Radial Leaded Resettable PTCs -- 16R250B
The USBR series radial leaded device is designed to provide overcurrent protection for USB applications where space is not a concern. Features RoHS compliant and lead-free Fast time-to-trip Meets all...
250V PolySwitch Lead-Free Surface Mount Resettable PPTC for Telecom Protection -- TSM250-130F-2 TSM250-130 series featured with two 250V Telecom PPTC assembling into single plastic housing with surface mount footprint, it provides tip and ring overcurrent protection and aids compliance with ITU-T K.20,...

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