MF-SM200-2-99

Overview

The Bourns MF-SM200-2-99 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse® family. It functions as an overcurrent protection device that automatically increases resistance in response to excessive current or elevated temperatures, thereby limiting current flow to safe levels. Upon removal of the fault condition and subsequent cooling, the component returns to its low-resistance state, allowing for circuit recovery without manual replacement. This design supports automated assembly processes and provides reliable protection against electrical faults in compact electronic systems.

Feature Summary

• Provides automatic overcurrent and overheating protection through reversible resistance changes
• Enables circuit recovery after fault clearance without requiring physical replacement
• Designed for surface-mount technology integration into printed circuit boards

Applications

• Portable consumer electronics
• Automotive electronic modules
• Telecommunications equipment
• Industrial control circuits

Procurement Notes

Verify the specific suffix codes on the ordering information to confirm voltage ratings and package variations. Ensure the selected variant matches the required hold and trip currents for the target application. Confirm compliance with relevant automotive or industrial standards if applicable. Check for RoHS directives and conflict mineral reporting status during sourcing.

Selection Notes

Select this component based on the required operating voltage and maximum continuous current for the protected circuit. Evaluate the expected ambient temperature range to ensure proper tripping characteristics. Consider the physical footprint constraints for surface-mount placement. Verify that the resettable nature aligns with the system's maintenance and safety requirements.

Part Context

This part belongs to the Multifuse® series of PPTC devices manufactured by Bourns Inc. The series offers various form factors including through-hole and surface-mount options. These components are widely used across multiple industries for reusable circuit protection, serving as an alternative to traditional fusible links in applications where frequent fault occurrences may happen.

Replacement Considerations

Consult official substitution guides for equivalent PPTC devices with matching hold current and voltage ratings. Verify package compatibility and thermal performance before replacing. Generic equivalents may not provide identical trip characteristics or long-term stability.