MF-USML500/12-2

Overview

The Bourns MF-USML500/12-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the USM Series. It provides overcurrent protection for electronic circuits by increasing resistance in response to excessive current flow, thereby limiting current until the fault is removed and the device cools. This specific component is designed for high-reliability applications requiring compact circuit protection solutions.

Feature Summary

• Surface-mount construction for automated assembly
• Self-resetting functionality after fault clearance
• High reliability for repeated trip cycles

Applications

• Portable electronics
• Automotive electronics
• Telecommunications equipment

Procurement Notes

Verify the exact part number against official Bourns documentation to ensure correct series and rating specifications. Confirm that the selected variant matches the required voltage and current parameters for the target application. Check for RoHS compliance status and any specific handling instructions provided in the datasheet before procurement.

Selection Notes

Select this component based on the specific hold current and trip current requirements of the protected circuit. Ensure the maximum voltage rating exceeds the operating voltage. Consider the physical size constraints for surface-mount placement and verify thermal management needs during fault conditions to maintain performance integrity.

Part Context

This part belongs to the USM Series of PPTC devices, which are designed for surface-mount technology. The series offers various ratings to suit different current and voltage levels, providing a versatile solution for protecting sensitive components in modern electronic assemblies where space is limited.

Replacement Considerations

Consult official Bourns substitution guides or datasheets for confirmed equivalent parts. Do not assume cross-compatibility with other manufacturers' PPTC devices without verifying electrical and mechanical specifications.