LR4-560F

Ptc Resettable Fuses Overview

The Littelfuse LR4-560F is a silicon-controlled rectifier (SCR) module designed for efficient switching in low-current circuits. It features blocking voltage ratings of 200 V dc to 600 V dc and surge capabilities of 15 A, 25 A, and 30 A. Available with ampere ratings of 1 A, 1.5 A, and 2 A, the device offers turnoff times below 55 µs. The component utilizes glass passivated junctions for durability and sensitive gates that allow direct interfacing with microprocessors. It is RoHS compliant and compatible with lead-free reflow soldering processes.

Ptc Resettable Fuses Feature Summary

• Sensitive gates enable direct interfacing with microprocessors
• Glass passivated junctions ensure operational durability
• Fast turn-off capabilities reduce commutation failure risk

Ptc Resettable Fuses Applications

• Strobe lights
• Fluid level sensors
• Capacitive-discharge ignition systems
• Solenoids in ground fault circuit interrupters (GFCIs)

Ptc Resettable Fuses Procurement Notes

Verify the specific electrical parameters against the official datasheet, as the product line includes variants with different blocking voltages (200 V to 600 V), surge capabilities (15 A, 25 A, 30 A), and ampere ratings (1 A, 1.5 A, 2 A). Confirm package configuration requirements, as devices are available in surface mount and axial pass-through formats. Ensure compliance with lead-free reflow soldering processes if applicable to your assembly line.

Ptc Resettable Fuses Selection Notes

Select this SCR module based on the required gate sensitivity for microprocessor control and the necessary turnoff speed to prevent commutation failure. Evaluate the specific current and voltage ratings needed for the application, noting the range of available options. Consider the physical package type, either surface mount or axial pass-through, to match the PCB layout constraints. Verify thermal management requirements given the compact design optimized for demanding electronic controls.

Ptc Resettable Fuses Part Context

This component belongs to Littelfuse's broad range of silicon-controlled rectifiers and SCR modules. These solutions are engineered for precise, efficient switching in low-current circuits. The series is characterized by activation with minimal gate current and fast turn-off capabilities. The manufacturer also produces discrete SCRs and modules optimized for solenoids in GFCIs and other electronic controls.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the official Littelfuse selection guide or distributor resources to identify equivalent components with matching voltage, current, and package specifications.