MF-LR190S

Ptc Resettable Fuses Overview

The Bourns MF-LR190S is a resettable polymeric positive temperature coefficient (PPTC) device from the MF-LR series, designed for circuit protection against overcurrent conditions. It features axial leads and operates within a voltage range up to 15 V. The component maintains a holding current of 1.9 A and trips at 4.2 A, with a maximum fault current rating of 100 A. Its typical resistance is 57 mΩ, and it functions reliably between -40°C and +85°C.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable circuit protection by switching to high impedance during overcurrent events
• Features low internal resistance for minimal power loss in normal operation
• Utilizes nickel-plated terminals compatible with standard soldering processes

Ptc Resettable Fuses Applications

• Protection for power supplies and transformers
• Overcurrent protection for switch-mode power devices
• Circuit safeguarding in automotive and medical equipment
• Instrumentation and control system protection

Ptc Resettable Fuses Procurement Notes

Verify that the specific suffix 'S' aligns with the required axial lead configuration and packaging format. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets before integration into designs requiring restricted substance adherence.

Ptc Resettable Fuses Selection Notes

Select this component when axial mounting is preferred over radial configurations within the same electrical family. Ensure the 1.9 A holding current matches the circuit's continuous operational load and that the 15 V maximum voltage rating exceeds the system's peak operating voltage.

Ptc Resettable Fuses Part Context

This part belongs to the MF-LR series of resettable fuses manufactured by Bourns. These devices are engineered to protect electronic circuits from excessive currents, offering a maintenance-free solution that restores functionality automatically after fault clearance and power cycling.

Ptc Resettable Fuses Replacement Considerations

Consider the MF-LS190RU as an alternative if radial mounting is acceptable, noting the identical electrical ratings but different physical termination style.