TRF250-120T-R1-B-0.5

Ptc Resettable Fuses Overview

The Littelfuse TRF250-120T-R1-B-0.5 is a PolySwitch resettable fuse from the TRF250 series, designed for PCB mount applications. It features radial termination with a 5 mm lead spacing and bulk packaging. Key electrical parameters include a hold current of 120 mA, trip current of 240 mA, and maximum voltage rating of 60 VDC (250 VRMS). The device supports a maximum rated current of 3 A and has an initial resistance of up to 16 Ohms. It operates within a temperature range of -40°C to +85°C, with dimensions of 11 mm length, 6.5 mm width, and 4.6 mm height.

Ptc Resettable Fuses Feature Summary

• Provides overcurrent protection through polymer PTC technology that automatically resets after fault clearance
• Features radial through-hole mounting with standardized 5 mm lead spacing for easy PCB integration
• Offers high voltage isolation capability with 250 VRMS rating alongside 60 VDC operation

Ptc Resettable Fuses Applications

• Consumer electronics circuit protection
• Building and home automation systems
• Industrial control circuits

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix configuration against official Littelfuse documentation to ensure correct package and termination type. Confirm RoHS compliance status and MSL rating prior to procurement. Cross-reference part number aliases such as RF0008-000 or RF0015-000 if sourcing from alternative distributors to ensure exact component matching.

Ptc Resettable Fuses Selection Notes

Select this component when a 120 mA hold current and 60 VDC maximum voltage are required for radial PCB mounting. Ensure the application environment stays within the -40°C to +85°C operating range. Consider the 16 Ohm maximum resistance for low-current signal line protection where minimal voltage drop is critical during normal operation.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch TRF250 series of resettable fuses. These devices utilize polymer positive temperature coefficient technology to provide reusable overcurrent protection. The series is widely used in electronic circuits requiring reliable, automatic reset capabilities without manual intervention after fault conditions are resolved.

Ptc Resettable Fuses Replacement Considerations

RF0008-000 and RF0015-000 are documented aliases for this component. Verify physical dimensions and electrical ratings match before substitution.