TRF250-120-B-0.5

Ptc Resettable Fuses Overview

The Littelfuse TRF250-120-B-0.5 is a PolySwitch resettable PTC fuse designed for overcurrent protection in electronic circuits. It features a holding current of 120 mA and a trip current of 240 mA, with a maximum voltage rating of 60 VDC. The device has a maximum rated current of 3 A and an initial resistance of 16 Ohms. It operates within a temperature range of -40°C to +85°C and utilizes radial leads with a 5 mm spacing for PCB mounting.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by increasing resistance during fault conditions
• Automatically resets to low-resistance state after cooling down
• Radial leaded package facilitates through-hole PCB integration

Ptc Resettable Fuses Applications

• Protection of automotive actuators and small motors
• Overcurrent safeguarding for telecom equipment wiring harnesses
• Circuit protection for battery-powered devices and power supplies

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix configuration against the official Littelfuse datasheet to ensure compatibility with required voltage and current ratings. Confirm that the radial lead pitch matches the target PCB footprint dimensions prior to procurement. Ensure compliance with RoHS directives if applicable to the end application requirements.

Ptc Resettable Fuses Selection Notes

Select this component when circuit design requires a resettable fuse with a 120 mA holding current and 60 VDC maximum voltage rating. Consider the 16 Ohm initial resistance and thermal characteristics for proper heat dissipation planning. Evaluate the 3 A maximum fault current capability against potential short-circuit scenarios in the target application environment.

Ptc Resettable Fuses Part Context

This part belongs to the TRF250 series of PolySwitch resettable fuses from Littelfuse. The series offers various configurations for automotive, telecom, and general electronics applications. These devices provide solid-state protection alternatives to traditional one-time fuses, enabling system recovery without manual replacement after overcurrent events.

Ptc Resettable Fuses Replacement Considerations

Compatible substitutes include RF0008-000 and TRF250-120S-B-0.5. Verify electrical parameters such as holding current, trip current, and voltage ratings match the original design specifications before substitution.