72R030XPR

Ptc Resettable Fuses Overview

The Littelfuse 72R030XPR is a PolySwitch resettable PTC fuse designed for overcurrent protection. It features a holding current of 300 mA and a trip current of 600 mA, with a maximum voltage rating of 72 VDC. The device has a maximum fault current rating of 40 A and a typical resistance of 2.1 Ohms. It operates within a temperature range of -40°C to +85°C and dissipates up to 490 mW. The component utilizes radial leads with a 5.1 mm spacing and measures 7.4 mm in diameter by 3.1 mm in length.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by increasing resistance during overcurrent events
• Offers reliable resettable functionality without requiring manual replacement
• Supports PCB mounting via radial leaded termination style

Ptc Resettable Fuses Applications

• Protection of automotive electronic circuits and wiring harnesses
• Overcurrent safeguarding for telecom and networking equipment ports
• Circuit protection in consumer electronics and power supply inputs

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix XPR corresponds to the Ammo Pack packaging configuration as listed in official Littelfuse documentation. Confirm that the 72VDC rating and 300mA holding current align with the target application requirements. Ensure compliance with RoHS standards and check for any recent manufacturing site change notices (PCN) affecting the radial leaded PPTC production line before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile radial solution is required for circuits operating at or below 72 VDC. The 300 mA holding current suits applications needing precise low-current protection. Consider the 2.1 Ohm initial resistance impact on signal integrity. Verify that the 40 A maximum fault current capability exceeds the prospective short-circuit current of the protected circuit branch to ensure adequate safety margins.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse 72R series of PolySwitch resettable fuses. The series provides solid-state overcurrent protection using polymer positive temperature coefficient technology. These devices are engineered for compact PCB integration, offering a cost-effective alternative to traditional fusible links in automotive, industrial, and telecommunications sectors where repeated fault tolerance is necessary.

Ptc Resettable Fuses Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.