RXE110

Ptc Resettable Fuses Overview

The Littelfuse RXE110 is a radial lead PTC resettable fuse from the PolySwitch RXE series. It features a hold current of 1.1 A and a trip current of 2.2 A, with a maximum voltage rating of 72 VDC. The device has a maximum interrupting current (Imax) of 40 A and an initial resistance typically ranging from 150 mOhms minimum to 380 mOhms. It operates within a temperature range of -40°C to +85°C and utilizes a cured, flame-retardant epoxy polymer compliant with UL94 V-0.

Ptc Resettable Fuses Feature Summary

• Polymeric construction with flame-retardant epoxy polymer housing
• Radial lead configuration for PCB mounting
• Self-resetting protection mechanism against overcurrent conditions

Ptc Resettable Fuses Applications

• Overcurrent protection in portable electronic devices
• Protection circuits for battery-powered equipment
• Interface protection in communication systems

Ptc Resettable Fuses Procurement Notes

Verify component status as this part may be obsolete or discontinued. Confirm exact datasheet revisions when sourcing replacements. Ensure compatibility with existing PCB footprints and thermal requirements during procurement planning.

Ptc Resettable Fuses Selection Notes

Select based on hold current requirements of 1.1 A and system voltage not exceeding 72 VDC. Consider the 40 A Imax rating for fault current handling. Evaluate thermal derating curves for high-temperature environments above standard operating ranges.

Ptc Resettable Fuses Part Context

Part of the Littelfuse PolySwitch RXE series, designed for compact overcurrent protection. The radial lead format facilitates through-hole PCB assembly. This specific model provides reliable circuit interruption without manual reset after fault clearance.

Ptc Resettable Fuses Replacement Considerations

Check for direct substitutes within the RXE series with matching electrical ratings. Verify that alternative components maintain compatible package dimensions and lead spacing for board compatibility.