MF-USML350-2

Overview

The Bourns MF-USML350-2 is a surface-mount multilayer polymer resettable fuse designed for circuit protection. It belongs to the SinglFuse series and features a time-delay characteristic suitable for applications requiring tolerance to inrush currents. The component operates within a voltage range of up to 60 VDC and maintains a holding current of 3.5 A. It is housed in a compact 1206 (3216 metric) package with dimensions of 3.2 mm length, 1.6 mm width, and 0.8 mm height. The device supports an operating temperature range from -40°C to +85°C and offers a high interrupt rating.

Feature Summary

• Multilayer polymer construction provides reliable overcurrent protection without replacing fuses after tripping.
• Time-delay design allows tolerance for transient inrush currents common in power supply inputs.
• Compact surface-mount footprint facilitates automated assembly and space-constrained PCB layouts.

Applications

• Portable electronic devices such as smartphones and tablets
• Consumer electronics including laptops and peripheral interfaces
• Automotive infotainment and telematics systems

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest datasheet to confirm exact electrical ratings and packaging configurations. Ensure compatibility with RoHS directives if required by your manufacturing standards. Cross-reference the part number with authorized distributors to confirm current availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a resettable solution is preferred over traditional fusible links for circuits carrying steady currents near 3.5 A. The time-delay characteristic makes it appropriate for lines with brief startup surges. Evaluate the maximum ambient temperature and peak pulse currents to ensure the device remains within its safe operating area during fault conditions.

Part Context

This part is part of Bourns' SinglFuse family of multilayer polymer resettable fuses. These components utilize proprietary conductive polymer technology to provide bidirectional protection. The series is widely used in consumer and industrial electronics where space savings and reusability are critical design factors.

Replacement Considerations

Consult official substitution guides for equivalent SinglFuse models with matching current and voltage ratings. Verify that any alternative part shares the same time-delay characteristic and physical package dimensions to ensure board compatibility.