AHRF650-2

Ptc Resettable Fuses Overview

The Littelfuse AHRF650-2 is a PolySwitch polymer PTC resettable fuse designed for automotive circuit protection. It features a radial, disc-style through-hole package with a maximum voltage rating of 16V and a hold current (Ih) of 6.5A. The device trips at 13.7A within 7 seconds and withstands a maximum fault current of 100A. Initial resistance is typically 9 mOhms, rising to a maximum of 26 mOhms after tripping. It operates between -40°C and 125°C, meets AEC-Q200 automotive qualification standards, and complies with RoHS3 regulations.

Ptc Resettable Fuses Feature Summary

• Polymer PTC technology provides automatic reset functionality upon fault clearance without manual replacement.
• Automotive-grade construction ensures reliability under harsh thermal and electrical conditions.
• Radial leaded package facilitates easy insertion into printed circuit boards for prototyping or production.

Ptc Resettable Fuses Applications

• Automotive electronic module overcurrent protection
• Indoor LED lighting circuit safeguarding
• General electronics power line surge protection

Ptc Resettable Fuses Procurement Notes

Verify component status as the AHRF650S variant is listed as obsolete. Confirm availability of the specific AHRF650-2 suffix variant through authorized distributors. Ensure procurement channels provide valid traceability documentation for automotive grade components. Check for direct substitutes like AHRF600 if supply chain constraints exist. Validate RoHS3 compliance certificates prior to integration.

Ptc Resettable Fuses Selection Notes

Select this component for applications requiring high holding current in low-voltage automotive systems. The 6.5A hold current suits high-power loads where standard fuses may nuisance trip. Consider the 16V rating limits usage to low-voltage DC circuits. The radial package requires sufficient board spacing for leads. Verify ambient temperature derating curves for operation above 25°C to ensure adequate current capacity.

Ptc Resettable Fuses Part Context

Part of the Littelfuse AHRF series, a family of automotive-grade polymeric PTC resettable fuses. These devices are engineered specifically for the demanding environment of modern vehicles, offering robust protection against short circuits and overloads while maintaining low initial resistance to minimize power loss during normal operation.

Ptc Resettable Fuses Replacement Considerations

The AHRF600 is documented as a direct substitute for the AHRF650S. Verify pin compatibility and electrical parameter alignment before swapping. Ensure the alternative part meets the same AEC-Q200 automotive qualification requirements for the target application.