LVR033K-2

Ptc Resettable Fuses Overview

The Littelfuse LVR033K-2 is a PolySwitch resettable PPTC fuse designed for line-voltage protection. It features a hold current of 330 mA and a trip current of 740 mA, with a maximum voltage rating of 240 VAC/VDC. The device has a maximum fault current (Imax) of 4.5 A and a typical resistance of 2.6 Ohms. It operates within a temperature range of -40°C to +85°C and dissipates up to 1.7 W. Physical dimensions are 19 mm in length, 11.4 mm in width, and 3.8 mm in height, with a lead spacing of 5.8 mm.

Ptc Resettable Fuses Feature Summary

• Provides resettable overcurrent and overheating protection for circuits rated at line voltages.
• Offers low resistance characteristics compatible with standard fuse solutions.
• Features radial-leaded mounting for direct PCB integration.

Ptc Resettable Fuses Applications

• Protection of electric motors in commercial appliances
• Transformer protection in home appliances
• Circuit safeguarding against mechanical overloads and stalls

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'K-2' against official Littelfuse documentation to confirm exact package or tolerance variations. Ensure the component meets required RoHS compliance standards for the target application. Cross-reference the datasheet for precise thermal derating curves and maximum power dissipation limits before finalizing the design.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection is required for line-voltage applications up to 240 VAC/VDC. The 330 mA hold current suits moderate load protection needs. Verify that the 4.5 A Imax rating exceeds potential surge currents in the system. Ensure the operating temperature range aligns with the environmental conditions of the end-use equipment.

Ptc Resettable Fuses Part Context

This part belongs to the LVR series of line-voltage-rated PolySwitch devices from Littelfuse. These components are specifically engineered to protect sensitive electronics in consumer and commercial appliances from damage caused by overcurrent surges and overtemperature faults. The series provides a resettable alternative to traditional fuses.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic PPTC fuses may not match the specific line-voltage ratings or physical footprint. Do not substitute without confirming electrical parameter compatibility and safety agency approvals.