TRF250-183U

Ptc Resettable Fuses Overview

The Littelfuse TRF250-183U is a PolySwitch resettable PTC fuse designed for through-hole PCB mounting. It features a radial, disc-style package with a 5.00 mm lead spacing. The device maintains a holding current of 183 mA and trips at 685 mA. It supports a maximum voltage of 100 VDC (250 VAC internal) and a maximum fault current of 10 A. Initial resistance is typically 800 mOhms minimum, rising to 3.4 Ohms maximum after tripping. It operates between -40°C and +85°C.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection by increasing resistance during overcurrent events
• Restores normal operation automatically after the fault condition clears and the device cools
• Designed for direct integration into printed circuit board assemblies via radial leads

Ptc Resettable Fuses Applications

• Building and home automation circuits
• Consumer electronics power input protection
• Industrial control system signal lines

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to ensure correct voltage and current ratings. Confirm that the radial disc package dimensions match the target PCB footprint. Check RoHS compliance status for the specific manufacturing batch. Ensure the maximum trip current capability aligns with the circuit's fault tolerance requirements before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile, through-hole resettable fuse is required for moderate current protection. The 183 mA holding current suits sensitive signal or low-power supply lines. Verify that the 10 A maximum fault current rating exceeds the potential short-circuit current in the application. Consider the thermal environment, as the operating range extends to 85°C.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse TRF250 series of PolySwitch resettable fuses. The series offers various holding currents and voltage ratings within a standardized radial disc package. These components are widely used for overcurrent protection in electronic devices requiring reliable, reusable circuit interruption without manual replacement.

Ptc Resettable Fuses Replacement Considerations

• RF0770-000

Ptc Resettable Fuses FAQ

What is the maximum fault current this fuse can withstand?

The TRF250-183U has a maximum fault current rating of 10 A.

Does this component support AC voltage applications?

Yes, it is rated for 250 VAC internally, although the external rating is listed as 100 VDC.