MF-SM050-2

Overview

The Bourns MF-SM050-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse from the Multifuse MF-SM series. It provides overcurrent protection with a hold current of 500 mA and a trip current of 1 A. The device supports a maximum voltage of 60 VDC and offers a high rated current capability of 40 A. Featuring a 2920 (7450 metric) package, it exhibits a typical resistance of 1.4 ohms. The component operates within a temperature range of -40°C to +85°C and complies with RoHS standards.

Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers robust overcurrent protection in a compact surface-mount footprint
• Eliminates tripping caused by ambient temperature variations through specialized polymer design

Applications

• Automotive electronic circuit protection
• Portable consumer electronics power lines
• Industrial control system overcurrent safeguarding

Procurement Notes

Verify the specific ordering suffix matches the required packaging configuration, such as cut tape or reel, as indicated in official distributor catalogs. Confirm that the component meets all relevant regulatory compliance requirements for the target market. Ensure that the selected variant aligns precisely with the electrical specifications defined in the manufacturer datasheet before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring 60 VDC protection with a 500 mA hold current threshold. The 2920 package size is suitable for applications needing higher current handling compared to smaller footprints while maintaining surface-mount compatibility. Evaluate thermal management requirements to ensure operation remains within the specified -40°C to +85°C range during normal and fault conditions.

Part Context

This part belongs to the Bourns Multifuse MF-SM series, which utilizes advanced polymer PTC technology for surface-mount applications. The series is engineered to provide reliable overcurrent protection in space-constrained environments. The MF-SM line distinguishes itself by offering low resistance values and high current ratings within standard SMD packages, facilitating efficient PCB layout and integration into modern electronic assemblies.

Replacement Considerations

Consult the official Bourns Multifuse selection guide for direct substitutes within the MF-SM series. Verify that alternative parts match the 500 mA hold current, 60 VDC rating, and 2920 package dimensions. Cross-reference electrical characteristics and certification status to ensure functional equivalence in the specific application context.