LS430850

Overview

The Powerex LS430850 is a single SCR isolated module within the POW-R-BLOK series, rated for 800 Volts and 500 Amperes. It features an electrically isolated heatsink design utilizing an aluminum nitride insulator and compression bonded elements on a metal baseplate. The device supports repetitive peak forward and reverse blocking voltages up to 1600 Volts across the series, with specific ratings of 800V for this variant. It offers a maximum junction temperature of +130°C and includes a quick connect gate terminal. The module weighs approximately 816 grams and provides 3000 Vrms isolation at 25°C.

Feature Summary

• Electrically isolated heatsinking for direct mounting on common heatsinks without additional insulation components
• Aluminum nitride insulator combined with compression bonded elements for low thermal impedance
• Quick connect gate terminal designed for keyed mating plugs to facilitate installation

Applications

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

Procurement Notes

Verify the complete eight-digit part number against the manufacturer's ordering table to ensure correct voltage and current specifications. Confirm that the required blocking voltage matches the application needs, as the LS43__50 series spans multiple voltage ratings. Ensure mounting hardware complies with the specified torque limits for M6 and M10 screws to maintain proper thermal contact and mechanical integrity.

Selection Notes

Select this module when high current rectification and electrical isolation are required in a compact footprint. Consider the thermal resistance from junction to case and the available conduction angles to determine appropriate heat sinking requirements. Verify that the gate trigger characteristics align with the driving circuit capabilities, particularly regarding peak forward gate current and non-triggering gate voltage thresholds.

Part Context

The LS430850 belongs to the POW-R-BLOK family of single SCR isolated modules manufactured by Powerex, Inc. This series is engineered for robust performance in power conversion applications, offering standardized dimensions and mounting configurations. The modular design allows for easy integration into larger power systems while maintaining safety through electrical isolation between the semiconductor elements and the mounting surface.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, compare key parameters such as repetitive peak voltage, average forward current, thermal resistance, and physical outline dimensions to ensure compatibility with existing mechanical and electrical designs.