FSMD300-2920-R

Ptc Resettable Fuses Overview

The FSMD300-2920-R is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse manufactured by RFE/Fuzetec. Designed for overcurrent protection in electronic circuits, this component utilizes a polymer composite that increases resistance significantly upon heating caused by excessive current flow. The device features a 2920 package footprint and is rated for a holding current of 0.3A with a maximum operating voltage of 60V. It provides reliable circuit interruption without permanent damage, automatically resetting once the fault condition is removed and the unit cools down.

Ptc Resettable Fuses Feature Summary

• Self-resetting functionality eliminates the need for manual replacement after fault clearance
• Polymer construction ensures rapid response to overcurrent conditions through thermal activation
• Surface-mount design facilitates automated assembly and compact board integration

Ptc Resettable Fuses Applications

• USB port overcurrent protection
• Portable electronic device battery circuits
• Laptop peripheral interface protection

Ptc Resettable Fuses Procurement Notes

Verify the manufacturer datasheet for specific trip time curves and ambient temperature derating factors before finalizing the design. Confirm that the selected package variant matches the intended PCB land pattern dimensions. Ensure the application environment does not exceed the specified maximum operating temperature limits to maintain reliable performance.

Ptc Resettable Fuses Selection Notes

Select this component based on the required hold current and trip current specifications relative to the normal operating load. Evaluate the maximum fault current the device must withstand without failing permanently. Consider the physical size constraints of the PCB layout when choosing between available package options within the same electrical family.

Ptc Resettable Fuses Part Context

This part belongs to the Fuzetec FSMD series of surface-mount resettable fuses. These components are widely used in consumer electronics and computer peripherals where space-saving protection is critical. The series offers various current ratings and package sizes to accommodate different circuit requirements while maintaining consistent protective characteristics.

Ptc Resettable Fuses Replacement Considerations

Direct replacements include other 2920 package PPTC fuses with identical or compatible electrical ratings from manufacturers such as Bourns, Littelfuse, or TE Connectivity. Verify that substitute parts match the voltage rating, hold current, and physical dimensions to ensure proper fit and function.