TR250-145-RA-C-0.5

Ptc Resettable Fuses Overview

The TR250-145-RA-C-0.5 is a PolySwitch resettable fuse from Littelfuse, designed for circuit protection in through-hole applications. It features a hold current of 145 mA and a trip current of 290 mA, with a maximum voltage rating of 60 VDC. The device has a maximum interrupting current of 3 A and an initial resistance of approximately 14 Ohms. It operates within a temperature range of -40°C to +85°C and utilizes a radial lead configuration with a 5 mm lead spacing.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection using polymeric PTC technology
• Offers high cycle life capability for repeated tripping events without replacement
• Features a compact radial package suitable for standard PCB mounting processes

Ptc Resettable Fuses Applications

• Portable electronic devices requiring overcurrent safeguarding
• Peripheral interface circuits such as USB or serial connections
• Battery pack protection systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'C' against the manufacturer datasheet to confirm material composition and flammability rating. Ensure the radial lead spacing matches the target PCB footprint. Confirm RoHS compliance status if required by project specifications. Cross-reference the exact part number with official Littelfuse documentation to avoid confusion with similar series variants.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile, through-hole resettable fuse is needed for low-current DC circuits. The 145 mA hold current suits sensitive signal lines or low-power peripherals. Consider the 60 VDC rating limit for system voltage compatibility. Evaluate thermal derating requirements based on ambient operating temperatures exceeding standard conditions.

Ptc Resettable Fuses Part Context

This part belongs to the TR250 series of PolySwitch resettable fuses. The series is characterized by small size and fast response times relative to traditional fuses. The TR250 line provides a cost-effective alternative to one-time fuses in applications where service interruption must be minimized.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other Littelfuse TR250 series parts with matching electrical ratings. Verify that any replacement maintains the same radial package dimensions and lead spacing to ensure mechanical compatibility.