06R120BPR

Overview

The Littelfuse 06R120BPR is a radial-leaded polymer PTC resettable fuse from the USBR series, designed for overcurrent protection in low-voltage circuits. It features a maximum voltage rating of 6V and a hold current (Ih) of 1.2A, with a trip current (It) of 2A. The device exhibits an initial resistance minimum of 65 mOhms and a maximum post-trip resistance of 140 mOhms. Rated for a maximum fault current of 40A, it operates within a temperature range of -40°C to +85°C. The component utilizes a through-hole radial package with a 5.10mm lead spacing.

Feature Summary

• Provides reliable overcurrent protection by increasing resistance upon heating to limit current flow
• Offers automatic reset functionality after fault conditions are cleared without manual intervention
• Designed for compact PCB mounting with radial leads for easy integration into wiring harnesses

Applications

• Protection of actuators and small motors in automotive systems
• Overcurrent safeguarding for battery packs and rechargeable batteries
• Circuit protection for telecommunication and networking equipment

Procurement Notes

Verify component authenticity and datasheet alignment due to end-of-life status. Confirm that substitute parts like RUSBF120-2 meet original electrical specifications. Check RoHS3 compliance and certification marks such as cURus and TUV before integration. Ensure storage conditions maintain moisture sensitivity level 1 integrity during handling.

Selection Notes

Select this part for applications requiring low-voltage protection with specific hold and trip current thresholds. Consider the radial form factor for through-hole assembly processes. Evaluate thermal management requirements given the operating temperature limits. Compare alternative USBR series variants if higher voltage or current ratings are needed for future-proofing designs.

Part Context

This component belongs to the Littelfuse USBR series of PolySwitch resettable fuses. These devices are solid-state PTC thermistors used widely in automotive, telecom, and power supply sectors. The series provides a cost-effective alternative to traditional fuses by eliminating replacement needs after tripping events while maintaining consistent circuit protection standards.

Replacement Considerations

The RUSBF120-2 is documented as a similar substitute part number for the 06R120BPR.