LVR025K-2

Ptc Resettable Fuses Overview

The Littelfuse LVR025K-2 is a PolySwitch resettable PTC fuse rated for 240VAC/VDC with a maximum interrupt rating of 265V. It features a hold current (Ih) of 250mA and a trip current (It) of 560mA. The device has a maximum resistance (R1) of 3.8 Ohms and a minimum initial resistance (Ri) of 1.3 Ohms. It supports a maximum operating current of 3.5A and dissipates up to 1.5W. The component operates within a temperature range of -20°C to 85°C, utilizes radial leaded packaging, and measures 9.60mm in length by 3.80mm in width.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection against surges and overtemperature faults
• Offers low resistance compatible with standard fuse solutions
• Features radial-leaded form factor for through-hole PCB mounting

Ptc Resettable Fuses Applications

• Protection of electric motors in commercial appliances
• Transformer protection in home appliances
• Circuit protection for wiring harnesses and PCB components

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix '-2' corresponds to the required tape-and-reel or cut-strip packaging configuration, as this affects handling and storage requirements. Confirm that the 240VAC voltage rating aligns with the target circuit's line voltage specifications. Ensure the 250mA hold current meets the application's normal operating current demands without nuisance tripping. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Ptc Resettable Fuses Selection Notes

Select this component when line-voltage protection is required for circuits drawing up to 250mA under normal conditions. The 560mA trip current provides a safety margin above the hold current while ensuring rapid response to fault conditions. Consider the 3.8 Ohm maximum resistance for voltage drop calculations in sensitive circuits. The radial leaded package is suitable for manual or automated insertion into printed circuit boards where space allows for the specified dimensions.

Ptc Resettable Fuses Part Context

This device belongs to the Littelfuse LVR series of PolySwitch resettable fuses designed specifically for line-voltage applications. These devices protect equipment from mechanical overloads, overheating, stalls, and lost neutral conditions. The LVR series offers a broad range of radial-leaded options compatible with 120VAC and 240VAC systems, providing solid-state protection that resets automatically after the fault condition is removed.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other LVR series parts with matching 250mA hold current and 240VAC ratings. Verify that any replacement maintains the same radial leaded package and dimensional constraints. Ensure the substitute part meets the same agency approvals such as UL, CSA, and TUV if certification continuity is required for the end product.