MF-SM050/60-2

Overview

The Bourns MF-SM050/60-2 is a surface-mount polymeric PTC resettable fuse designed for circuit protection. It features a hold current of 0.5A and a trip current of 1A, with a maximum voltage rating of 60V. The device has a maximum resistance of 0.35 Ohms and can withstand a maximum fault current of 40A. Power dissipation is rated at 1.7W, with a typical time to trip of 4 seconds. The component measures 7.98 x 5.44 x 3.18mm and is packaged in tape and reel format.

Feature Summary

• Polymeric positive temperature coefficient construction for automatic reset capability after fault clearance
• Surface-mount design compatible with automated assembly processes
• Automotive qualification compliant with AEC-Q200 standards

Applications

• Automotive electronic circuit protection
• Overcurrent protection for portable devices
• Protection of communication interfaces

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as MF-SM050/60-2-H5 may exist within the same family. Confirm that the required package type matches the standard SMD configuration. Ensure the selected part meets the necessary AEC-Q200 automotive qualification requirements if intended for vehicle applications. Cross-reference datasheet parameters against system constraints before finalizing procurement decisions.

Selection Notes

Select this component based on the 0.5A hold current and 60V maximum voltage ratings to ensure compatibility with low-voltage circuits. Consider the 40A maximum fault current capability when designing protection schemes for potential short-circuit conditions. Evaluate the thermal environment, as operating temperatures range from -40°C to 85°C. The surface-mount form factor requires appropriate PCB footprint design for reliable soldering and mechanical stability.

Part Context

This part belongs to the Multifuse MF-SM series by Bourns Inc., which offers various current and voltage ratings. The MF-SM series is characterized by its compact size and reliability in protecting sensitive electronics. Similar parts in the series include MF-SM050-2 and MF-SM100-2, differing primarily in current handling capabilities while maintaining similar physical dimensions and mounting styles.

Replacement Considerations

Direct substitutes within the Bourns lineup include MF-SM050-2, which shares identical electrical characteristics but may differ in packaging or suffix specifications. Verify that any replacement maintains the 0.5A hold current and 60V rating. Ensure the alternative part supports the required AEC-Q200 certification if automotive use is mandated. Check for availability of equivalent components from other manufacturers if Bourns stock is limited.