AHRF800

Ptc Resettable Fuses Overview

The Littelfuse AHRF800 is a resettable polymeric positive temperature coefficient (PPTC) device, also identified by the alias AHRL800. Classified as an overcurrent protection component within the PolySwitch family, it serves as a self-resetting fuse for circuit safeguarding. The device operates by increasing resistance significantly upon overheating caused by excessive current, thereby limiting flow until the fault is removed and the unit cools down. It is designed for surface-mount or through-hole integration depending on specific variant configurations.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions without requiring manual replacement
• Utilizes polymer technology to achieve rapid response to thermal events triggered by electrical faults
• Offers reliable performance in automotive and industrial applications requiring robust transient handling

Ptc Resettable Fuses Applications

• Automotive electronic systems requiring overcurrent protection
• Industrial control circuits needing resettable fuse solutions
• Consumer electronics protected against short-circuit hazards

Ptc Resettable Fuses Procurement Notes

Verify the exact package type and current rating configuration when ordering, as the AHRF800 designation may correspond to specific variants within the broader AHRL/AHRF series. Confirm RoHS compliance status and lead-free soldering compatibility with the manufacturer's latest documentation prior to procurement to ensure adherence to environmental regulations and assembly requirements.

Ptc Resettable Fuses Selection Notes

Select this component based on the required hold current and trip current specifications for the target application circuit. Ensure the maximum voltage rating aligns with the system operating voltage. Consider the physical footprint and mounting style constraints of the PCB design. Validate that the thermal characteristics meet the ambient temperature expectations of the final product environment.

Ptc Resettable Fuses Part Context

This part belongs to Littelfuse's extensive portfolio of PolySwitch resettable fuses, which are widely used for overcurrent protection. The AHRF800 specifically relates to the automotive-grade or high-reliability segment of this line, often associated with Tyco Electronics legacy data when tracing historical component lineage. It complements other discrete protection devices like varistors and TVS diodes in comprehensive circuit protection strategies.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers include AHRF800-2 and AHRF800-AP from Tyco Electronics/Littelfuse. These variants share similar functional descriptions as PolySwitch Resettable Devices for automotive applications. Verify pinout and dimensional compatibility before substitution.