SMD300-2

Ptc Resettable Fuses Overview

The Littelfuse SMD300-2 is a surface-mount PolySwitch resettable fuse designed for overcurrent protection in electronic circuits. It features a hold current of 3 A and a trip current of 6 A, with a maximum voltage rating of 6 VDC. The device has a maximum rated current of 40 A and a typical resistance of 72 mOhms. It operates within a temperature range of -40°C to +85°C and utilizes an SMD/SMT termination style for PCB mounting.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by resetting after fault conditions clear
• Designed for surface-mount assembly on printed circuit boards
• Offers high current interruption capability relative to its size

Ptc Resettable Fuses Applications

• Protection of low-voltage electronic circuits from overcurrent events
• Automotive electronics applications requiring compact protection solutions
• Consumer electronics where manual fuse replacement is impractical

Ptc Resettable Fuses Procurement Notes

Verify the specific voltage rating configuration, as datasheets may list variants with different maximum voltage ratings such as 6 VDC or 24 VDC. Confirm that the package type matches the target PCB footprint requirements. Ensure the operating temperature range aligns with the environmental conditions of the final application. Cross-reference the manufacturer part number with official Littelfuse documentation to confirm availability and compliance status.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable protection mechanism is required for low-voltage DC lines. The 3 A hold current suits moderate load applications. Consider the 6 VDC rating limit carefully; if higher voltages are present, alternative series like SMDC or RUEF may be necessary. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range during normal and fault conditions.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch family of resettable fuses. These devices utilize polymer positive temperature coefficient technology to provide reliable overcurrent protection. The SMD300-2 represents a standard surface-mount variant within this lineup, offering a balance of current handling and physical size for general-purpose electronic protection tasks.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data.