MF-SM250-2-99

Ptc Resettable Fuses Overview

The Bourns MF-SM250-2-99 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-SM series. It features a hold current of 2.5 A and a trip current of 5.0 A, designed for circuits with a maximum voltage rating of 60 V. The device exhibits a typical resistance of 48 mΩ and can withstand a maximum fault current of 40 A. It operates within a temperature range of -40°C to +85°C and utilizes a radial termination style adapted for surface mounting.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by increasing resistance in response to overcurrent or overheating conditions
• Functions as a resettable fuse that restores normal operation after the fault condition is removed
• Designed for surface-mount PCB integration to support compact electronic assemblies

Ptc Resettable Fuses Applications

• Overcurrent protection for portable electronics
• Protection of battery-powered devices and power supplies
• Surge protection in communication equipment interfaces

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized distributors and check for RoHS compliance documentation. Confirm the specific suffix indicates the correct packaging format. Review the official datasheet for thermal derating curves and time-current characteristics to ensure suitability for the target application environment.

Ptc Resettable Fuses Selection Notes

Select this component based on the required 2.5 A hold current and 60 V maximum voltage rating. Ensure the surface-mount package fits the available PCB footprint. Evaluate the trip current threshold against the system's normal operating current to prevent nuisance tripping during transient loads.

Ptc Resettable Fuses Part Context

This part belongs to the MF-SM series of surface-mount PPTC devices manufactured by Bourns Inc. These components are engineered for high-reliability applications requiring compact protection solutions. The series supports various current ratings and voltage classes for diverse electronic designs.

Ptc Resettable Fuses Replacement Considerations

Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement matches the hold current, trip current, and voltage ratings. Verify that the alternative component supports the same surface-mount installation method.