TRF250-110U-2

Ptc Resettable Fuses Overview

The Littelfuse TRF250-110U-2 is a PolySwitch resettable PTC fuse designed for overcurrent protection in PCB-mounted applications. It features radial leads with a 5 mm spacing and operates within a temperature range of -40°C to +85°C. The device maintains a maximum holding current of 110 mA and trips at 220 mA. It supports a maximum voltage of 60 VDC (with a 250 V interrupt rating) and handles a maximum current of 3 A. Initial resistance ranges from 6 to 10 Ohms, while post-trip resistance reaches up to 16 Ohms.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by increasing resistance during fault conditions
• Offers automatic circuit restoration after cooling without manual replacement
• Designed for through-hole mounting on printed circuit boards

Ptc Resettable Fuses Applications

• Protection of circuits, wiring harnesses, and PCB components
• Overcurrent protection for automotive actuators, screens, and small motors
• Telecom and power supply circuit safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific part number suffix against official Littelfuse documentation to confirm lead time and availability status. Ensure the procurement channel sources genuine components to maintain certification validity. Cross-reference the manufacturer's latest datasheet for any recent package or material changes before finalizing orders.

Ptc Resettable Fuses Selection Notes

Select this component when a radial-leaded resettable fuse is required for low-current circuit protection. Confirm that the 110 mA holding current aligns with the normal operating load. Verify that the 60 VDC rating meets the system voltage requirements and that the 5 mm lead spacing fits the PCB layout constraints.

Ptc Resettable Fuses Part Context

This part belongs to the TRF250 series of PolySwitch resettable fuses. These devices are engineered for compact space-constrained applications requiring robust overcurrent protection. The series is widely utilized in automotive, telecom, and consumer electronics sectors where reliable, reusable circuit protection is essential.

Ptc Resettable Fuses Replacement Considerations

The part number alias RF0126-000 indicates a potential cross-reference or alternate designation. Verify compatibility with other TRF250 series variants having identical electrical ratings if substitution is necessary.