LVR040K-1

Ptc Resettable Fuses Overview

The Littelfuse LVR040K-1 is a line-voltage-rated self-resetting fuse (PPTC) from the LVR series, designed for AC/DC circuits up to 240V. It features a hold current of 0.4A and a trip current of 0.9A with a maximum trip time of 24 seconds. The device has a radial leaded package measuring 11.5mm in length and 20.9mm in height. Electrical characteristics include a minimum resistance of 0.6Ω and a maximum resistance of 970mΩ. It supports a power dissipation of 2W and operates within a temperature range of -20°C to 85°C.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection for line-voltage applications
• Protects against mechanical overloads, overheating, and stall conditions
• Offers low internal resistance compatible with standard fuse solutions

Ptc Resettable Fuses Applications

• Protection of electric motors in commercial appliances
• Transformer protection in home appliances
• Circuit safeguarding against lost neutral conditions

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation when ordering, as Littelfuse utilizes distinct suffixes to denote variations in lead length, packaging format, or specific voltage ratings within the LVR family. Confirm that the selected variant matches the required hold and trip currents for the target circuit design. Ensure compliance with RoHS and halogen-free requirements if specified by the end-product standards. Cross-reference the datasheet for the exact physical dimensions to ensure adequate clearance on the printed circuit board.

Ptc Resettable Fuses Selection Notes

Select this component for applications requiring line-voltage protection where automatic recovery after fault clearance is necessary. The 0.4A hold current suits low-power motor or transformer loads. Consider the 24-second trip time for tolerance against temporary inrush currents. Verify that the operating environment stays within the -20°C to 85°C range. The radial leaded form factor simplifies through-hole mounting compared to surface-mount alternatives.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse LVR series, which specializes in polymeric positive temperature coefficient devices rated for line voltages. These components are engineered to replace traditional fuses in appliances, offering reusable protection against overcurrent and overtemperature faults. The series provides a broad range of radial-leaded options for protecting motors and transformers in residential and commercial equipment.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes may include other LVR series variants with matching 0.4A hold current and 240V rating. Verify that any replacement maintains the same trip time characteristics and physical footprint. Ensure the alternative part meets the same UL, TUV, and CSA safety certifications required for the original application.