RXEF065S

Ptc Resettable Fuses Overview

The Littelfuse RXEF065S is a PolySwitch radial leaded resettable PPTC fuse designed for overcurrent protection. It features a hold current of 650 mA and a trip current of 1.3 A, with a maximum voltage rating of 72 VDC. The device has a maximum fault current rating (Imax) of 40 A and an initial resistance of 720 mOhms. Power dissipation is rated at 880 mW. Operating temperature ranges from -40°C to +85°C. Physical dimensions include a diameter of 9.7 mm, length of 3 mm, and a lead spacing of 5.8 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection through automatic resistance increase during fault conditions
• Offers resettable functionality to restore circuit operation after cooling
• Compatible with high-volume electronics assembly processes

Ptc Resettable Fuses Applications

• Computer motherboards
• USB hubs, ports and peripherals
• Industrial controls

Ptc Resettable Fuses Procurement Notes

Verify the specific Littelfuse datasheet for the RXEF065S to confirm all electrical parameters and mechanical tolerances match your design requirements. Ensure that the radial lead configuration and PCB mounting style are compatible with your assembly process. Cross-reference agency approvals such as UL 1434 and CSA if required by your target market regulations. Confirm RoHS compliance status directly from the manufacturer's documentation before finalizing component selection.

Ptc Resettable Fuses Selection Notes

Select this component when a low hold current near 650 mA is required for circuit protection. The 72 VDC maximum voltage rating suits low-voltage DC applications. Consider the 40 A interrupting capability for potential short-circuit scenarios. The radial lead form factor is suitable for through-hole PCB mounting where space allows for the specified body dimensions and lead spacing.

Ptc Resettable Fuses Part Context

The RXEF065S belongs to the Littelfuse RXEF series of PolySwitch resettable fuses. This series provides a comprehensive range of radial leaded PPTC devices characterized by low hold currents and high voltage ratings up to 72V. These components are part of Littelfuse's broader portfolio of solid-state circuit protection solutions designed for automotive, telecom, and general electronic applications.

Ptc Resettable Fuses Replacement Considerations

Consult Littelfuse official resources for verified substitute part numbers within the RXEF series or other PolySwitch families that match the required 650 mA hold current and 72 VDC voltage rating.