72R090XPR

Ptc Resettable Fuses Overview

The Littelfuse 72R090XPR is a PolySwitch resettable PTC device designed for overcurrent protection. It features a holding current of 900 mA and a trip current of 1.8 A, with a maximum voltage rating of 72 VDC. The component has a maximum resistance of 470 mOhms and a fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C and dissipates up to 990 mW. Physical dimensions include a diameter of 11.2 mm and a length of 3.1 mm, with a lead spacing of 5.1 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising resistance as it heats to limit current flow during fault conditions.
• Offers resettable functionality, eliminating the need for manual replacement after tripping events.

Ptc Resettable Fuses Applications

• Circuit and wiring harness protection
• PCB component safeguarding
• Telecom equipment protection

Ptc Resettable Fuses Procurement Notes

Verify the specific part number 72R090XPR against official Littelfuse documentation to ensure accuracy. Confirm that the radial lead configuration and 72VDC rating align with system requirements. Check RoHS compliance status via the manufacturer's datasheet. Validate thermal performance specifications against the intended operating environment before finalizing procurement decisions.

Ptc Resettable Fuses Selection Notes

Select this component when a 900 mA holding current and 72 VDC maximum voltage are required for circuit protection. Ensure the PCB layout accommodates the 11.2 mm diameter and 5.1 mm lead spacing. Consider the 470 mOhms initial resistance and 990 mW power dissipation limits for thermal management. Verify compatibility with the -40°C to +85°C operating temperature range for the application.

Ptc Resettable Fuses Part Context

This device belongs to the 72R series of PolySwitch resettable fuses from Littelfuse. It is categorized under radial-leaded PPTC devices, distinct from surface-mount or automotive-specific variants. The series provides solid-state protection solutions for general electronic circuits, differing from higher-voltage or higher-current specialized fuse lines.

Ptc Resettable Fuses Replacement Considerations

The 60R090XPR offers identical electrical characteristics including 900 mA holding current and 470 mOhms resistance but features a lower maximum voltage rating of 60 VDC instead of 72 VDC. Substitution requires verification that the reduced voltage rating meets the circuit's operational demands.