RXEF375K-0.144

Ptc Resettable Fuses Overview

The Littelfuse RXEF375K-0.144 is a radial leaded polymeric resettable fuse (PPTC) from the RXEF series, designed for overcurrent protection in electronic circuits. It features a hold current of 3.75 A and a trip current of 7.5 A, with a maximum voltage rating of 72 V DC. The device has a maximum interrupt rating of 40 A and an initial resistance of 144 mΩ. It operates within a temperature range of -40°C to +85°C and utilizes a bulk packaging format for PCB mounting.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Offers dual UL and CSA agency recognition for safety compliance
• Constructed with halogen-free materials for environmental compatibility

Ptc Resettable Fuses Applications

• Computer motherboards and peripheral interfaces
• Industrial control systems and instrumentation
• USB hubs, ports, and consumer electronics peripherals
• Battery pack protection circuits

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix K against official Littelfuse documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required hold current tolerance and thermal characteristics for the target application environment. Cross-reference the datasheet electrical parameters to validate compatibility with system voltage and current limits before procurement.

Ptc Resettable Fuses Selection Notes

Select this component based on the required 3.75 A hold current and 72 V maximum voltage rating. Consider the 144 mΩ initial resistance for power loss calculations and the 40 A interrupt rating for fault current handling capability. Evaluate the radial leaded form factor for through-hole PCB assembly requirements and verify operating temperature range suitability for the deployment environment.

Ptc Resettable Fuses Part Context

The RXEF series represents a line of high-current, low-resistance resettable fuses designed for robust overcurrent protection. These devices utilize polymer positive temperature coefficient technology to provide reliable circuit safeguarding in space-constrained applications. The series supports various termination methods and voltage ratings to accommodate diverse industrial and consumer electronic design needs.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalent part numbers. Generic replacements may not match the specific 144 mΩ resistance or 40 A interrupt rating. Verify that any substitute maintains the same radial leaded configuration and agency approvals for direct board replacement.