SMD1812P110TFA

Ptc Resettable Fuses Overview

The SMD1812P110TFA is a PolySwitch resettable PPTC fuse from Littelfuse, designed for surface mount applications. It features a hold current of 1.1 A and a trip current of 2.2 A. The device supports a maximum voltage of 16 V and can withstand a maximum fault current of 100 A. Its initial resistance is typically 0.15 Ohms. The component operates within a temperature range of -40°C to +85°C and utilizes an 1812 (4532 metric) package.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through reversible tripping action upon overcurrent conditions
• Designed for surface mount technology integration with reflow soldering compatibility
• Offers compact form factor suitable for space-constrained printed circuit board layouts

Ptc Resettable Fuses Applications

• PC motherboard overcurrent protection
• Portable electronic device circuit safeguarding
• Battery pack protection circuits

Ptc Resettable Fuses Procurement Notes

This component is classified as obsolete by the manufacturer. Availability is limited to existing stock or secondary market channels. Verify end-of-life status and lead times carefully before finalizing design-in decisions. Consider lifecycle management strategies due to discontinuation.

Ptc Resettable Fuses Selection Notes

Select this part when a 1.1 A hold current and 16 V rating are required in an 1812 footprint. Ensure the application current remains below the hold threshold under worst-case temperature conditions. Verify that the expected fault current does not exceed the 100 A maximum rating to prevent device damage.

Ptc Resettable Fuses Part Context

Part of the SMD-P series of PolyFuse resettable fuses. This series provides polymer-based positive temperature coefficient protection solutions. The 1812 footprint allows for automated assembly processes. The product line focuses on providing reliable overcurrent protection for modern electronic assemblies.

Ptc Resettable Fuses Replacement Considerations

Littelfuse recommends using part number 1812L as a replacement. Refer to the official Littelfuse documentation for detailed substitution guidelines and parameter comparisons between the legacy and recommended components.