2920L125PR

Ptc Resettable Fuses Overview

The Littelfuse 2920L125PR is a PolySwitch resettable PTC fuse from the 2920L series, designed for surface mount applications. It features a holding current of 1.25 A and a trip current of 2.5 A. The device supports a maximum voltage of 15 VDC and can withstand a maximum fault current of 40 A. With a typical resistance of 70 mOhms and a power dissipation rating of 1.5 W, it operates within a temperature range of -40°C to +85°C. The component is housed in a 2920 (7351 metric) package with dimensions of 7.35 mm x 5.08 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through self-resetting polymeric positive temperature coefficient technology
• Designed for surface mount integration into compact electronic assemblies
• Offers reliable overcurrent interruption without requiring manual replacement

Ptc Resettable Fuses Applications

• Portable electronics battery pack protection
• USB port overcurrent protection
• Automotive infotainment system circuits
• Industrial control board input stages

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'DR' or 'PR' against the manufacturer's official datasheet to confirm reel packaging specifications and moisture sensitivity level requirements. Ensure that the selected variant matches the required tape and reel configuration for automated assembly processes. Cross-reference the RoHS compliance status with the latest environmental declaration documents provided by Littelfuse to meet regulatory standards.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile surface mount solution is required for circuits operating at 15 VDC or lower. The 1.25 A holding current makes it suitable for protecting low-power data lines and peripheral interfaces. Consider the 2920 form factor for boards where space constraints limit the use of larger axial or through-hole resettable fuses.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch 2920L series, which specializes in high-reliability resettable fuses for consumer and industrial electronics. The series is engineered to provide robust protection against overcurrent conditions while maintaining a small footprint. These devices are commonly used in applications requiring repeated fault recovery without service intervention.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other 2920L series variants with similar electrical ratings, such as the 2920L150 or 2920L250, depending on the specific current requirements of the target circuit. Verify that any alternative maintains the same 15 VDC voltage rating and SMD package compatibility.