SMD1206P020TFA

Ptc Resettable Fuses Overview

The Littelfuse SMD1206P020TFA is a surface-mount PolySwitch resettable PPTC fuse designed for overcurrent protection. It belongs to the POLY-FUSE SMD-P series and utilizes a leadless, surface-mount package in the 1206 (3216 metric) footprint. The device functions as a solid-state fuse that increases resistance upon heating to limit current flow during fault conditions. Key electrical parameters include a hold current of 2.0 A, a trip current of 3.5 A, and a maximum operating voltage of 8 V. The component exhibits a typical initial resistance of 60 mOhms and can withstand a maximum fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for circuits by raising resistance as it heats to limit current during fault events.
• Features a leadless, surface-mount construction compatible with modern reflow and wave soldering procedures.
• Offers resettable functionality, allowing the device to return to low resistance after cooling down post-fault.

Ptc Resettable Fuses Applications

• Protection of actuators, screens, and small motors in commercial and passenger automotive electronics.
• Overcurrent safeguarding for battery packs and rechargeable batteries against short circuits and overcharging.
• Circuit protection for telephony and networking equipment from high-voltage fault currents.
• PCB-level protection for sensitive components and integrated circuits in power supply applications.

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'TFA' corresponds to the required tape-and-reel packaging configuration, as Littelfuse offers various packaging options including cut tape and mouse reel. Confirm that the 8 V maximum voltage rating aligns with the target circuit's operational requirements. Ensure the 1206 footprint matches the PCB land pattern design. Check for any recent product change notices regarding labeling or material composition updates.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable fuse with a 2.0 A hold current and 8 V rating is required for space-constrained designs. The 1206 package size offers a balance between current handling capacity and board area efficiency compared to smaller footprints. Consider the 60 mOhm typical resistance for minimal voltage drop impact in low-voltage circuits. Evaluate the thermal environment to ensure the +85°C maximum operating temperature is sufficient for the application.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse POLY-FUSE SMD-P series of PolySwitch resettable fuses. These devices are solid-state PPTC switches designed to replace traditional one-time fuses in applications requiring resettable protection. The series is widely used in automotive, telecom, and consumer electronics for protecting circuits from overcurrent events without permanent interruption.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing BOMs before considering alternative manufacturers. Cross-reference technical specifications such as hold current, trip current, and voltage rating if sourcing from other vendors.