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

Page: 1 2 3 4
Product Name Notes
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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,...

Next >>