AHEF500

Ptc Resettable Fuses Overview

The Littelfuse AHEF500 is a PolySwitch resettable PPTC fuse designed for high-temperature automotive applications. It features a 5A hold current and a 10A trip current with a maximum voltage rating of 32VDC. The device offers a minimum resistance of 40 mOhms and a maximum fault current rating of 100A. It operates within a temperature range of -40°C to +85°C and dissipates up to 5.3W. Certified to AEC-Q200 standards, it utilizes radial leads with a 5.8mm spacing in a bulk package.

Ptc Resettable Fuses Feature Summary

• Provides overcurrent protection through automatic resistance increase upon heating
• Meets AEC-Q200 qualification for automotive reliability requirements
• Supports high-temperature operation suitable for demanding environments

Ptc Resettable Fuses Applications

• Automotive circuit protection
• Actuator and screen circuit safeguarding
• Small motor protection in commercial vehicles

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet version and AEC-Q200 certification status before integration. Confirm that the 32VDC rating aligns with the target system's electrical parameters. Ensure PCB layout accommodates the radial lead spacing and thermal dissipation requirements specified in the official documentation.

Ptc Resettable Fuses Selection Notes

Select this component when automotive-grade reliability and high-temperature tolerance are required. The 5A hold current suits moderate load circuits needing resettable protection. Consider the 32VDC limit and 100A fault capacity for appropriate circuit coordination.

Ptc Resettable Fuses Part Context

The AHEF500 belongs to the Littelfuse AHEF series of PolySwitch resettable fuses. This series targets automotive electronics, offering robust overcurrent protection for sensitive components. The radial leaded form factor facilitates through-hole mounting on printed circuit boards.

Ptc Resettable Fuses Replacement Considerations

The RUEF500K is an alternative radial leaded PPTC fuse from Littelfuse. Verify compatibility regarding voltage ratings, current specifications, and physical dimensions before substitution.