72R250XMR

Ptc Resettable Fuses Overview

The Littelfuse 72R250XMR is a PolySwitch resettable PTC fuse designed for overcurrent protection in electronic circuits. It features a radial leaded package suitable for PCB mounting. The device maintains a holding current of 2.5 A and trips at 5 A. It supports a maximum voltage rating of 72 VDC with a maximum fault current capacity of 40 A. The initial resistance is 130 mOhms, and power dissipation is rated at 2.5 W. Operating temperatures range from -40°C to +85°C, with a lead spacing of 10.2 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by increasing resistance during overcurrent events
• Offers reliable reset functionality after fault conditions are cleared
• Designed for surface or through-hole PCB integration via radial leads

Ptc Resettable Fuses Applications

• Protection of automotive actuators and small motors
• Overcurrent safeguarding for telecom equipment wiring harnesses
• Circuit protection for consumer electronics power supplies

Ptc Resettable Fuses Procurement Notes

Verify component authenticity against official Littelfuse documentation before integration. Confirm that the specific ordering suffix matches the required packaging format and lead configuration. Ensure environmental compliance requirements align with project specifications. Cross-reference datasheet parameters against actual application loads to prevent nuisance tripping or inadequate protection levels.

Ptc Resettable Fuses Selection Notes

Select this component when circuit operating currents remain below 2.5 A but require protection against surges up to 5 A. Evaluate thermal management needs as power dissipation affects trip timing. Consider the 72 VDC limit for system voltage compatibility. Assess physical space constraints regarding the radial lead spacing and body dimensions for PCB layout optimization.

Ptc Resettable Fuses Part Context

This part belongs to the 72R series of PolySwitch resettable fuses manufactured by Littelfuse. The series provides robust overcurrent protection solutions for various industrial and commercial applications. The 72R designation indicates specific voltage and current characteristics within the broader product family.

Ptc Resettable Fuses Replacement Considerations

The 72R185XF is listed as a related radial leaded alternative within the same series. Verify electrical ratings and physical dimensions before substitution.