SMD1812P150TFA

Ptc Resettable Fuses Overview

The Littelfuse SMD1812P150TFA is a PolySwitch resettable PTC device in the SMD-P series, designed for surface-mount PCB applications. It features a 1.5 A hold current and an 8 VDC maximum voltage rating. The component trips at 3 A with a maximum fault current rating of 40 A. Its initial resistance is 160 mOhms, and it operates within a temperature range of -40°C to +85°C. The package dimensions are 4.73 mm by 3.41 mm with a height of 0.9 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for circuits and ICs through positive temperature coefficient behavior.
• Designed for direct surface-mount soldering onto printed circuit boards.
• Offers high pulse resistance and compatibility with lead-free soldering profiles.

Ptc Resettable Fuses Applications

• Protection of portable electronic devices
• Overcurrent safeguarding for peripheral interfaces
• Circuit protection in consumer electronics

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix TFA against official Littelfuse documentation to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required hold current and voltage ratings for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before procurement.

Ptc Resettable Fuses Selection Notes

Select this component when space-constrained designs require surface-mount overcurrent protection. The 1812 footprint accommodates standard reflow processes. Evaluate the trip current relative to normal operating currents to ensure proper activation during fault conditions while maintaining stability under nominal loads.

Ptc Resettable Fuses Part Context

This device belongs to the Littelfuse PolySwitch SMD-P series, which provides resettable fuse solutions for compact electronics. The series utilizes polymer technology to limit current flow upon overheating, offering reusable protection compared to traditional one-time fuses.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic replacements may not match the precise tripping characteristics or thermal response times required for sensitive circuit protection.

Ptc Resettable Fuses FAQ

What is the maximum fault current rating for this device?

The maximum fault current rating is 40 A.

Does this component support lead-free soldering?

Yes, the device is compatible with lead-free solders and higher temperature profiles.