RXE250

Ptc Resettable Fuses Overview

The Littelfuse RXE250 is a radial lead polymeric positive temperature coefficient (PPTC) resettable fuse designed for circuit protection. It features a hold current of 2.5 A and a maximum voltage rating of 72 VDC. The device supports a maximum trip current of 5 A and can withstand an interrupting current (Imax) of 40 A. Its typical resistance is 130 mΩ, with an operating temperature range from -40°C to +85°C. The component utilizes a bulk packaging format and is suitable for PCB mount applications requiring overcurrent safeguarding.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit reset capability following fault clearance without manual intervention
• Offers dual-mode protection against both overcurrent conditions and thermal overload events
• Constructed with a radial lead configuration for straightforward printed circuit board integration

Ptc Resettable Fuses Applications

• Portable electronic devices requiring compact overcurrent protection
• Battery-powered equipment circuits
• Consumer electronics power input stages

Ptc Resettable Fuses Procurement Notes

Verify the specific Littelfuse datasheet for the RXE series to confirm exact electrical tolerances and mechanical dimensions prior to implementation. Ensure that the selected variant matches the required hold and trip current specifications for the target application circuit. Confirm compliance with relevant safety agency approvals such as UL or CSA if mandated by the end-product regulations. Cross-reference the package style to ensure compatibility with the assembly process.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable protection mechanism is preferred over single-use fuses in low-voltage DC circuits. The 2.5 A hold current makes it suitable for moderate load applications where transient surges may occur but sustained overloads must be interrupted. Consider the 130 mΩ resistance impact on power loss within the design. Evaluate the 72 VDC rating to ensure adequate margin above the nominal system voltage. Assess the physical size constraints against the available PCB real estate.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RXEF series of resettable fuses, which are engineered for general-purpose circuit protection in consumer and industrial electronics. The series provides a reliable alternative to traditional fusible links by allowing serviceability after fault conditions. These components are widely utilized in industries prioritizing cost-effective and maintainable circuit safeguarding solutions.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic PPTC fuses may not match the precise tripping characteristics or safety certifications.