RHEF070U

Ptc Resettable Fuses Overview

The Littelfuse RHEF070U is a resettable PTC fuse from the RHE series, designed for overcurrent protection in electronic circuits. It features a holding current of 700 mA and a trip current of 1.4 A at ambient temperature. The device supports a maximum voltage of 30 V DC and has a high fault current rating of 40 A. Its typical resistance is 800 mΩ, operating within a temperature range of -40°C to +125°C. The component utilizes radial leads for PCB mounting and is available in cut tape or reel packaging.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault conditions clear without manual replacement
• Offers dual function as both a fuse and a switch for simplified circuit design
• Ensures reliable operation across extended industrial temperature ranges

Ptc Resettable Fuses Applications

• Portable electronics battery pack protection
• Peripheral interface circuit overcurrent safeguarding
• Automotive low-voltage accessory line protection

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'U' against official Littelfuse documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required axial or radial lead configuration for your PCB layout. Cross-reference the datasheet for precise thermal derating curves before finalizing procurement quantities.

Ptc Resettable Fuses Selection Notes

Select this component when a reusable overcurrent solution is preferred over traditional fuses. Ensure the circuit's normal operating current remains below the 700 mA holding current to prevent nuisance tripping. Verify that the expected fault current does not exceed the 40 A maximum rating to ensure safe interruption capabilities.

Ptc Resettable Fuses Part Context

This part belongs to the RHE series of resettable polymeric positive temperature coefficient devices. These components are engineered for compact surface mount or through-hole applications where space constraints and maintenance accessibility are critical factors in system reliability and safety design.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic PTCs may differ in trip time characteristics or physical dimensions.