72R025XPR

Ptc Resettable Fuses Overview

The Littelfuse 72R025XPR is a POLYFUSE PTC resettable fuse designed for overcurrent protection in electronic circuits. It features a hold current of 250 mA and a trip current of 500 mA, with a maximum voltage rating of 72 VDC. The device has a maximum resistance of 3 Ohms and a rated current of 40 A. It operates within a temperature range of -40°C to +85°C and dissipates 490 mW. The component utilizes a radial leaded package with a disc shape, measuring 7.4 mm in diameter and 3.1 mm in length.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions through positive temperature coefficient behavior
• Offers reliable resettable functionality without requiring manual replacement after fault clearance
• Designed for low-voltage power applications using a compact radial leaded form factor

Ptc Resettable Fuses Applications

• General electronics circuit protection
• Low voltage power supply lines
• Peripheral device input protection

Ptc Resettable Fuses Procurement Notes

Verify the specific hold current and voltage ratings against the target circuit requirements before integration. Confirm that the radial leaded package dimensions align with the printed circuit board layout constraints. Ensure the operating temperature range meets the environmental specifications of the final assembly. Check RoHS compliance status if required by regulatory standards.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable protection solution is needed for low-voltage DC circuits. The 72V rating suits systems operating below this threshold. Consider the thermal environment, as self-heating affects trip characteristics. Compare the trip current margin against normal operating currents to prevent nuisance tripping during transient loads.

Ptc Resettable Fuses Part Context

This part belongs to the 72R series of POLYFUSE resettable fuses from Littelfuse. The series offers various hold current options within a consistent 72V maximum voltage platform. These devices are widely used in consumer electronics and industrial controls where space-saving and reusable protection are prioritized over single-use fuses.

Ptc Resettable Fuses Replacement Considerations

Cross-reference with other 72R series variants for different current ratings. Verify equivalent parts from other manufacturers only if they match the exact voltage, hold current, and physical dimensions. Ensure substitute components meet the same safety agency approvals.