AHRF1500

Ptc Resettable Fuses Overview

The Littelfuse AHRF1500 is a PolySwitch resettable polymer PTC fuse designed for high-temperature automotive applications. It features a radial, through-hole package with a disc-style form factor. The device maintains a holding current of 15A and trips at 33A under maximum voltage conditions of 16VDC. It offers a maximum fault current rating of 100A and an initial resistance as low as 2.7 mOhms, rising to a maximum trip resistance of 9.2 mOhms. Operating within a temperature range of -40°C to +125°C, it meets AEC-Q200 qualification standards for automotive electronics reliability.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for automotive circuits by increasing resistance upon heating during fault conditions.
• Features a robust radial leaded construction suitable for PCB mounting in compact electronic assemblies.
• Designed for high-temperature environments with operation capabilities up to +125°C.
• Automotive-grade component qualified to AEC-Q200 standards for durability and performance.

Ptc Resettable Fuses Applications

• Protection of actuators, screens, and small motors in commercial and passenger vehicles
• Overcurrent protection for wiring harnesses and printed circuit board components
• Secondary circuit protection in compact automotive electronics

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and variant selection. Confirm that the required AEC-Q200 automotive qualification aligns with your project specifications. Check the latest datasheet for any updates on mechanical dimensions or thermal characteristics before finalizing the design integration.

Ptc Resettable Fuses Selection Notes

Select this component when a high-current resettable fuse is required for automotive systems operating at low voltages. Ensure the application current remains below the 15A holding limit while accounting for ambient temperature derating. Verify that the 16VDC maximum voltage rating exceeds the system's peak operating voltage to prevent dielectric breakdown during normal operation.

Ptc Resettable Fuses Part Context

The AHRF1500 belongs to the Littelfuse PolySwitch AHRF series, which specializes in resettable fuses for demanding automotive environments. This series provides solid-state protection solutions that replace traditional one-time fuses, allowing for automatic circuit recovery after fault clearance without manual intervention.

Ptc Resettable Fuses Replacement Considerations

Consult the official Littelfuse replacement guide for verified cross-reference part numbers. Do not substitute with generic PTC devices unless they match the exact electrical ratings and AEC-Q200 automotive qualification requirements.