Littelfuse introduces three new PolySwitch family of self-restoring PPTC devices for automotive use in accordance with AEC-Q200

     Littelfuse announced the launch of three PolySwitch self-restoring polymer positive Temperature Coefficient (PPTC) device families compliant with AEC-Q200. These surface-mount devices are designed to provide complete overcurrent protection in extremely harsh automotive environments. Unlike fuses, self-restoring PPTC does not need to be replaced after a failure; When the power supply is removed and/or the overcurrent condition disappears, the circuit will return to normal operation.

     Compared to the existing 2920 ASMD Series surface mount PPTC, the largest of the new devices, the 2920 ASMDC series, is smaller and has no heavy metal terminals. It also has the highest holding current and rated voltage of the three. The smallest of the new devices, the 0603 gauge femtoASMD series and the 0805 gauge picoASMD series, are suitable for automotive electronic boards with limited space.

     Typical applications of the ASMDC, femtoASMD and picoASMD series of self-recovery PPTC include automotive infotainment, communications (GPS navigation), networking (CAN bus, LIN bus), body electronics (door locks, lumbar pumps), security systems (keyless entry), Rear-view camera), ADAS(Advanced Driver Assistance System), and air conditioning system.

     "These SMD self-recovering PPTCS offer compact or compact package options that comply with the AEC-Q200 standard and are suitable for overcurrent and short circuit protection for components under the hood." Said Yong Zhang, product manager of Littelfuse PPTC devices. "These products broaden the form factor, operating current and voltage range of Littelfuse products, and give automotive electronics designers greater design flexibility."