RXEF250-2

Ptc Resettable Fuses Overview

The Littelfuse RXEF250-2 is a PolySwitch radial leaded PPTC resettable fuse designed for overcurrent protection. It features a 2.5 A hold current and a maximum voltage rating of 72 VDC. The device trips at 5 A and can withstand a maximum fault current of 40 A. Its initial resistance is 130 mOhms maximum, with an operating temperature range from -40°C to +85°C. The component utilizes a radial package with a 10.9 mm lead spacing.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers dual-element protection against both overcurrent and thermal overload events
• Compatible with high-volume electronics assembly processes

Ptc Resettable Fuses Applications

• Computer motherboards
• Industrial controls
• USB hubs and peripherals
• Battery packs

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation during procurement, as variations such as K or AP may indicate different packaging formats or compliance certifications rather than functional changes. Confirm that the required agency approvals align with regional regulatory standards for the target deployment environment.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a resettable solution with a 72 VDC maximum rating. Ensure the application current remains below the 2.5 A hold threshold while accounting for ambient temperature derating factors within the specified -40°C to +85°C operational window.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RXEF series of PolySwitch devices. The series provides comprehensive radial leaded options with low hold currents and high voltage ratings. These components are recognized by UL, CSA, TUV, and CQC agencies for use in various electronic equipment categories.

Ptc Resettable Fuses Replacement Considerations

RXEF250K-2 serves as a parameter-equivalent substitute option available from the manufacturer.