15LR190U

Ptc Resettable Fuses Overview

The Littelfuse 15LR190U is a polymeric PTC resettable fuse from the POLY-FUSE LR series. It features a maximum voltage rating of 15V and a hold current (Ih) of 1.9A. The component utilizes a user-defined strap configuration for circuit protection. Designed as a surface-mount device, it provides overcurrent protection by increasing resistance during fault conditions. The unit is lead-free and RoHS compliant, suitable for integration into compact electronic assemblies requiring reliable thermal switching capabilities.

Ptc Resettable Fuses Feature Summary

• Polymeric positive temperature coefficient resettable fuse construction
• User-defined strap design for customizable circuit integration
• Lead-free and RoHS compliant manufacturing process

Ptc Resettable Fuses Applications

• Battery charger circuits
• Electronic ballast systems
• AC-DC power converters
• DC-DC power converters

Ptc Resettable Fuses Procurement Notes

Verify the specific package type and termination style against the official datasheet before procurement. Confirm that the 15V rating aligns with the system's maximum operating voltage. Ensure the 1.9A hold current meets the application's continuous load requirements without nuisance tripping. Check for any specific reflow soldering profile recommendations to maintain component integrity during assembly.

Ptc Resettable Fuses Selection Notes

Select this component when a low-voltage, high-current resettable fuse is required for surface-mount applications. The 15V rating limits suitability to low-voltage DC systems. Consider the trip time characteristics relative to the protected circuit's tolerance. Evaluate the physical footprint constraints against the available board space. Compare alternative series if higher voltage ratings or different current thresholds are necessary.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse POLY-FUSE LR series, which focuses on surface-mount PTC fuses. The series is designed for protecting sensitive electronics in compact form factors. The LR series typically offers fast response times and low resistance. This specific model represents a standard configuration within the broader product line for general circuit protection.

Ptc Resettable Fuses Replacement Considerations

The LR4-190F is a documented substitute with identical electrical specifications including 15V and 1.9A ratings. Verify mechanical compatibility and pinout alignment before substitution. Ensure the replacement maintains the same RoHS compliance status. Cross-reference the datasheet to confirm equivalent thermal performance characteristics.