SMD1812P050TFA

Ptc Resettable Fuses Overview

The Littelfuse SMD1812P050TFA is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the SMD-P series. It features a hold current of 0.5 A and a trip current of 1 A, with a maximum voltage rating of 6 V DC. The device has a minimum resistance of 0.06 Ω and a maximum resistance of 0.15 Ω, dissipating up to 0.8 W. It operates within a temperature range of -40°C to +85°C and supports a maximum fault current of 40 A.

Ptc Resettable Fuses Feature Summary

• Provides overcurrent protection by increasing resistance upon heating to limit current flow
• Surface-mount design allows for direct PCB integration in automated assembly processes
• Solid-state construction eliminates the need for replacement after tripping events

Ptc Resettable Fuses Applications

• Protection of telephony and networking equipment from high-voltage fault currents
• Overcurrent safeguarding for computer peripheral devices
• Circuit protection in mobile phone battery packs
• Power supply unit component safeguarding

Ptc Resettable Fuses Procurement Notes

Verify component status carefully as this part number may be discontinued or subject to limited availability. Confirm RoHS compliance and specific package dimensions against the official datasheet before finalizing procurement plans. Ensure storage conditions align with manufacturer recommendations to maintain material integrity prior to soldering.

Ptc Resettable Fuses Selection Notes

Select this component when low voltage operation around 6 V DC is required alongside a 0.5 A hold current. Consider the compact 1812 footprint for space-constrained designs. Evaluate the thermal environment to ensure the operating temperature range of -40°C to +85°C meets system requirements without derating issues.

Ptc Resettable Fuses Part Context

This device belongs to the Littelfuse PolySwitch PPTC family, designed for reliable circuit protection. The SMD-P series specifically targets surface-mount applications, offering low resistance and fast response times. These components are engineered to protect sensitive electronics from overcurrent events while maintaining a small physical profile suitable for modern PCB layouts.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative PPTC devices based on electrical parameters such as hold current, trip current, and voltage rating rather than direct cross-referencing.