AHRF450S-1.0

Ptc Resettable Fuses Overview

The AHRF450S-1.0 is a polymeric PTC resettable fuse from the Littelfuse AHRF series, designed for automotive applications. It features a holding current of 4.5 A and a trip current of 8.7 A. The device supports a maximum voltage of 16 VDC and has a maximum fault current rating of 100 A. Initial resistance is typically low, with a maximum operating temperature of +125°C and a minimum of -40°C. It utilizes a radial leaded through-hole package.

Ptc Resettable Fuses Feature Summary

• Designed specifically for automotive industry requirements
• High-temperature capability up to +125°C
• Lead-free construction compliant with environmental standards

Ptc Resettable Fuses Applications

• Automotive circuit protection
• High-temperature electronic assemblies
• Radial leaded PCB mounting

Ptc Resettable Fuses Procurement Notes

Verify that the specific suffix '-1.0' matches the required datasheet revision and physical dimensions. Confirm that the 16VDC voltage rating and 4.5A holding current align with the target circuit design parameters. Ensure the radial leaded package style is compatible with the intended PCB footprint and assembly process.

Ptc Resettable Fuses Selection Notes

Select this component when automotive-grade reliability and high-temperature operation are required. The 16VDC rating suits low-voltage automotive systems. Compare the 8.7A trip current against expected surge loads to ensure proper protection without nuisance tripping during normal operation.

Ptc Resettable Fuses Part Context

Part of the AHRF series, which offers various current ratings from 50mA to 15A. This series provides fast time-to-trip characteristics and low resistance options suitable for diverse automotive circuit protection needs.

Ptc Resettable Fuses Replacement Considerations

Consider AHRL4500 or RHEF450 if different package styles or electrical characteristics are acceptable. Verify that substitute parts meet the same automotive qualification standards and thermal limits.