MF-USMF035-2

Overview

The Bourns MF-USMF035-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse from the Multifuse USMF series. Designed for overcurrent protection, it features a hold current of 350 mA and a trip current of 750 mA at 25°C. The device supports a maximum voltage of 16 VDC and a maximum fault current of 20 A. It operates within a temperature range of -40°C to +85°C and is housed in a compact 0603 (1608 metric) package. This component provides reliable circuit protection against short circuits and overload conditions.

Feature Summary

• Provides automatic resettable overcurrent protection using polymer PTC technology
• Eliminates the need for manual replacement after fault clearance
• Offers robust protection against short circuits and sustained overloads
• Designed for space-constrained surface-mount applications

Applications

• Portable electronic devices requiring compact circuit protection
• Consumer electronics with limited board space
• Battery-powered equipment needing overcurrent safeguarding
• Automotive infotainment and accessory circuits

Procurement Notes

Verify the specific suffix '-2' corresponds to the required tape-and-reel packaging configuration as defined by Bourns documentation. Confirm that the 16V rating and 350mA hold current align with the target circuit's operational parameters. Ensure compatibility with standard reflow soldering profiles for 0603 packages. Check for RoHS compliance status in the latest datasheet before finalizing procurement specifications.

Selection Notes

Select this component when a low-profile, surface-mount solution is required for overcurrent protection in low-voltage circuits. The 0603 footprint allows for high-density PCB layouts compared to through-hole alternatives. Consider the 16VDC maximum voltage limit and ensure the operating environment stays within the -40°C to +85°C range. Evaluate the tripping characteristics against the protected circuit's normal operating current to prevent nuisance trips.

Part Context

This part belongs to the Bourns Multifuse USMF series, which specializes in miniature surface-mount PPTC resettable fuses. The series is engineered for applications where space is critical and traditional axial leads cannot fit. These devices utilize a proprietary polymer composite that increases resistance significantly upon overheating, effectively limiting current flow until power is removed and the device cools down.

Replacement Considerations

Direct replacements must match the 0603 package, 350mA hold current, and 16VDC voltage rating. Verify that any substitute component shares similar trip current characteristics and thermal response times to ensure equivalent circuit protection performance without altering the board layout or soldering process.