MF-USMD050-2

Overview

The MF-USMD050-2 is a polymeric resettable fuse from the Multifuse MF-USMD series, designed for surface-mount applications. It features a maximum voltage of 13.2V and a hold current (Ih) of 500 mA. The initial resistance is typically 180 mOhms, with a post-trip maximum resistance of 900 mOhms. It supports a maximum trip current of 40 A and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Very small size with a 1210 footprint, offering a 44% smaller design compared to the MF-MSMD Series
• Fast tripping resettable circuit protection capability

Applications

• Overload protection in portable electronics
• Circuit protection for USB-powered devices
• Protection for low-voltage battery-operated equipment

Procurement Notes

Verify the specific ordering suffix '-2' against official Bourns documentation to ensure correct lead time and packaging specifications. Confirm that the 13.2V rating aligns with your system's maximum operating voltage requirements before procurement.

Selection Notes

Select this component when space constraints are critical due to its compact 1210 footprint. Ensure the application current does not exceed the 500 mA hold current under all operating conditions. Verify compatibility with surface-mount assembly processes given its physical form factor.

Part Context

This part belongs to the Multifuse MF-USMD series, which focuses on miniaturized surface-mount protection solutions. It serves as an alternative to larger radial or through-hole fuses where board real estate is limited. The series emphasizes fast response times and reliable resettable performance for modern electronic designs.

Replacement Considerations

Consider the MF-MSMD series for similar functionality if a slightly larger footprint is acceptable. Verify that any substitute maintains the same 13.2V maximum voltage and 500 mA hold current ratings to ensure circuit safety compliance.