30R090UPR

Ptc Resettable Fuses Overview

The Littelfuse 30R090UPR is a PolySwitch resettable PTC fuse designed for overcurrent protection in electronic circuits. It features a maximum operating voltage of 30 VDC and a hold current of 900 mA, with a trip current of 1.8 A. The device has a maximum fault current rating of 40 A and an initial resistance of 70 mOhms, rising to a maximum of 220 mOhms after tripping. It operates within a temperature range of -40°C to +85°C and dissipates up to 600 mW. The component utilizes radial leads with a 5.1 mm spacing and is supplied in tape-and-reel packaging.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by increasing resistance as it heats during fault conditions
• Offers automatic circuit restoration without manual replacement after cooling
• Designed for through-hole mounting on printed circuit boards

Ptc Resettable Fuses Applications

• Protection of automotive actuators, screens, and small motors
• Overcurrent safeguarding for telecommunication and networking equipment
• Circuit and wiring harness protection in consumer electronics

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix UPR confirms tape-and-reel packaging rather than bulk supply. Confirm RoHS3 compliance status and REACH declarations match project requirements. Check for any recent design changes or coating material updates documented in manufacturer notices prior to ordering.

Ptc Resettable Fuses Selection Notes

Select this component when a 30 VDC system requires a 900 mA hold current with radial lead termination. Ensure the 40 A maximum fault current rating exceeds potential short-circuit levels. Consider the 5.1 mm lead spacing for PCB layout compatibility and verify thermal dissipation needs against the 600 mW power rating.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse 30R series of PolySwitch resettable fuses. These devices are solid-state polymer components that replace traditional fusible links in applications requiring repeated overcurrent events. The series provides compact protection solutions for various industrial and commercial sectors.

Ptc Resettable Fuses Replacement Considerations

The RUEF090 serves as a functional substitute within the same voltage and current class, though it offers a higher 100 A fault current rating. Verify mechanical dimensions and lead spacing compatibility before substitution.