SMD1812P200TSA

Ptc Resettable Fuses Overview

The SMD1812P200TSA is a surface-mount PolySwitch resettable fuse from Littelfuse, designed for overcurrent protection in electronic circuits. It operates within a voltage range of 6 V to 60 V and features a holding current of 2 A with a trip current of 3.5 A. The device exhibits a maximum resistance of 60 mOhms and can withstand fault currents up to 40 A. Packaged in an 1812 (4532 metric) SMD/SMT form factor, it supports PCB mounting and functions reliably across an operating temperature range of -40 °C to +85 °C.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising resistance as the device heats during fault conditions.
• Offers automatic circuit recovery without requiring manual replacement after tripping.
• Designed for surface-mount integration to protect PCBs and integrated circuits from shorts.

Ptc Resettable Fuses Applications

• Protection of battery packs and rechargeable batteries from overcurrent and short circuits.
• Overcurrent safeguarding for handheld electronics and portable devices.
• Circuit protection for LED arrays and lighting applications.
• Defense against overcurrent events in networking equipment and AC-DC power adapters.

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or verified supply channels. Confirm RoHS compliance status and check for end-of-life notifications, as availability may be limited. Ensure storage conditions maintain device integrity prior to soldering. Validate that the specific suffix matches the required electrical parameters for the target application design.

Ptc Resettable Fuses Selection Notes

Select this component based on the required holding current of 2 A and maximum operating voltage of 60 V. Ensure the 1812 package size fits the available PCB footprint constraints. Verify that the trip current of 3.5 A aligns with the normal operating current of the protected circuit to prevent nuisance tripping while ensuring adequate fault protection.

Ptc Resettable Fuses Part Context

This part belongs to the POLY-FUSE SMD-P series of resettable fuses. It utilizes polymeric positive temperature coefficient technology to provide solid-state circuit protection. The series is engineered for surface-mount assembly, offering a compact alternative to traditional axial leaded fuses in modern electronic manufacturing processes.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse documentation for direct cross-reference substitutes. Verify that any alternative maintains identical voltage ratings, holding current, and package dimensions to ensure mechanical and electrical compatibility without redesigning the PCB layout.