AHEF100

Ptc Resettable Fuses Overview

The AHEF100 is a PolySwitch resettable PPTC fuse from the AHEF series, designed for automotive applications. It features a radial leaded package with a hold current of 100 mA and a trip current of 250 mA. The device supports a maximum voltage of 32 VDC and has a maximum fault current rating of 100 A. Initial resistance is typically 4.5 Ohms, rising to a maximum of 16 Ohms after tripping. It operates within a temperature range of -40°C to 125°C and is qualified under AEC-Q200 standards.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for sensitive electronic circuits in automotive environments.
• Automotive-grade component qualified to AEC-Q200 standards for high reliability.
• Radial leaded form factor facilitates through-hole PCB mounting.

Ptc Resettable Fuses Applications

• Protection of automotive actuators and small motors
• Overcurrent safeguarding for vehicle screens and displays
• Circuit protection for wiring harnesses and PCB components

Ptc Resettable Fuses Procurement Notes

Verify that the specific part number matches the required electrical ratings, particularly the 100 mA hold current and 32 VDC maximum voltage. Confirm AEC-Q200 qualification status is required for the target application. Ensure the radial lead spacing and physical dimensions are compatible with the printed circuit board layout before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component when low-current automotive circuit protection is needed. The 100 mA rating suits small loads like sensors or indicator lights. Consider the higher initial resistance compared to higher-current variants. Verify thermal management requirements due to the self-heating nature of PPTC devices in confined spaces.

Ptc Resettable Fuses Part Context

The AHEF100 belongs to Littelfuse's AHEF series of PolySwitch resettable fuses. This series is specifically engineered for automotive use, offering robust performance under harsh conditions. It complements other series like RHEF for general electronics by providing specialized automotive qualification and packaging options.

Ptc Resettable Fuses Replacement Considerations

Compatible substitutes include other AHEF series parts with similar hold currents, such as AHEF050 or AHEF150, provided voltage and current ratings align. Cross-reference with RHEF series equivalents if automotive qualification is not strictly mandatory, ensuring package compatibility.