LDR31654

Overview

The Powerex LDR31654 is a Dual SCR Isolated POW-R-BLOK module rated for 540 Amperes and up to 1800 Volts. It features electrically isolated heatsinking, compression bonded elements, and a metal baseplate. The device includes gate lead kits and M10 terminal hardware. Electrical characteristics include a repetitive peak forward and reverse blocking voltage of up to 1800 V, a peak on-state voltage of 1.50 V at 1570 A, and a critical rate of rise of off-state voltage of 1000 V/µs. Thermal resistance from junction to case is 0.0325 °C/W per module. Operating temperature ranges from -40 to +130 °C.

Feature Summary

• Electrically isolated heatsinking eliminates the need for additional insulation components
• Compression bonded elements ensure reliable performance under high current conditions
• Metal baseplate design facilitates easy installation without clamping components
• Includes integrated gate lead kits and M10 terminal hardware for simplified assembly

Applications

• Bridge circuits
• AC & DC motor drives
• Battery supplies
• Power supplies
• Large IGBT circuit front ends

Procurement Notes

Verify the specific voltage rating suffix within the LDR3__54 series before ordering, as the part number indicates a range up to 1800 Volts. Confirm that the required gate lead kit and M10 terminal hardware are included in the package. Ensure mounting torque specifications for M6 screws (55 in.-lb) and M10 terminals (110 in.-lb) are adhered to during installation.

Selection Notes

Select this module for applications requiring phase control with isolated packaging. Consider the thermal impedance coefficients and maximum allowable case temperatures when designing the heatsink system. Verify that the gate trigger current and voltage requirements align with the driver circuit capabilities. Ensure the operating temperature range fits within the specified -40 to +130 °C junction temperature limits.

Part Context

The LDR31654 belongs to the LDR3__54 series of Dual SCR Isolated POW-R-BLOK modules from Powerex. This series offers various voltage ratings from 800 to 1800 Volts while maintaining a consistent 540 Ampere current rating. The modules are designed for robust industrial applications requiring high power density and electrical isolation.

Replacement Considerations

Direct replacements must match the 540 Ampere current rating and appropriate voltage class within the 800-1800 Volt range. Verify compatibility with existing mounting dimensions and M10 terminal configurations. Ensure the replacement device supports similar gate trigger characteristics and thermal management requirements.