LDR31650

Overview

The Powerex LDR31650 is a Dual SCR Isolated POW-R-BLOK module rated for 500 Amperes and voltages up to 1600 Volts. It features electrically isolated heatsinking, compression bonded elements, and a metal baseplate. The module 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 with both conducting.

Feature Summary

• Electrically isolated heatsinking for easy mounting on common heatsinks without additional insulation components
• Compression bonded elements and metal baseplate for low thermal impedance and improved current capability
• Includes standard gate lead kits with FEP insulated wires and M10 terminal hardware for installation

Applications

• Bridge Circuits
• AC & DC Motor Drives
• Battery Supplies
• Power Supplies
• Large IGBT Circuit Front Ends

Procurement Notes

Verify the specific voltage rating required, as the LDR3 series covers 1600V to 1800V options. Confirm that the application environment supports the specified operating temperature range of -40°C to +130°C. Ensure proper mounting torque specifications are followed for M6 and M10 screws to maintain isolation integrity and thermal performance.

Selection Notes

Select this module for phase control applications requiring high current capacity and electrical isolation. Consider the thermal impedance coefficients and maximum allowable case temperatures when designing the cooling system. Verify compatibility with the included gate lead kit terminals and ensure the drive circuit can provide the necessary gate trigger current and voltage levels.

Part Context

The LDR31650 belongs to the POW-R-BLOK Dual SCR Isolated Module family from Powerex. This series is designed for robust industrial power electronics applications. The module utilizes compression bonding technology and an aluminum nitride insulator (implied by similar models in the series) to achieve high reliability and low thermal resistance.

Replacement Considerations

Direct replacements within the same series include other LDR3 variants with different voltage ratings such as LDR31850. Cross-series comparisons should be made carefully, considering differences in package dimensions, thermal characteristics, and electrical ratings.