MF-USMF050-2

Overview

The Bourns MF-USMF050-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse family. It provides overcurrent protection in compact SMD/SMT packages. Key electrical parameters include a hold current of 50 mA, a trip current of 150 mA, and a maximum voltage rating of 30 VDC. The device features a high maximum rated current of 10 A and an initial resistance of 50 Ohms. It operates within a temperature range of -40°C to +85°C and meets AEC-Q100 automotive qualification standards.

Feature Summary

• Provides automatic circuit protection by increasing resistance significantly upon overheating due to overcurrent conditions.
• Offers reliable reset functionality after cooling, eliminating the need for manual replacement or rewiring.
• Complies with AEC-Q100 automotive qualification standards for robust performance in demanding environments.

Applications

• Automotive electronics circuits requiring AEC-Q100 compliant protection
• Portable electronic devices utilizing low-voltage power supplies
• Industrial control systems needing compact overcurrent safeguards

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the received part matches the specific MF-USMF050-2 designation and series markings. Ensure storage conditions maintain integrity prior to assembly. Check for physical damage on terminals before soldering. Validate compliance documentation against project requirements.

Selection Notes

Select this component when designing circuits operating at voltages up to 30 VDC with steady-state currents near 50 mA. The 150 mA trip threshold suits applications requiring rapid response to moderate fault currents. Consider the 50 Ohm initial resistance impact on signal integrity or power loss. The AEC-Q100 qualification makes it suitable for automotive-grade designs where reliability is critical.

Part Context

This part belongs to the Bourns Multifuse MF-USMF series, designed for surface-mount technology. It complements other resettable fuses in the portfolio offering various current ratings and package sizes. The series supports miniaturization trends in modern electronics while maintaining safety standards for overcurrent protection across consumer and industrial sectors.

Replacement Considerations

Consult official Bourns substitution guides for compatible alternatives. Verify that any substitute maintains identical voltage, current, and thermal characteristics. Ensure package dimensions match existing footprints. Confirm that replacement parts meet the same AEC-Q100 automotive qualification if required by the design specifications.