LDR31850

Overview

The LDR31850 is a dual SCR isolated thyristor module manufactured by Powerex Inc. under the POW-R-BLOK™ series. It features a chassis mount configuration designed for high-power industrial applications. The component provides a repetitive peak off-state voltage of 1.8 kV and supports an average on-state current of 785 A. This robust semiconductor device integrates two SCRs in a series connection within a single insulated package, ensuring reliable performance in demanding electrical environments.

Feature Summary

• Dual SCR isolated construction for enhanced safety and circuit flexibility
• High current capacity with 785 A average on-state rating
• Robust POW-R-BLOK™ chassis mount packaging for efficient thermal management
• Series connection topology supporting high-voltage operation up to 1.8 kV

Applications

• Industrial motor drives and control systems
• High-power DC-to-AC inversion circuits
• Resistive load switching applications
• Static power switching modules

Procurement Notes

Verify the specific ordering suffix against official Powerex documentation to confirm exact electrical characteristics and terminal configurations. Ensure that the procurement channel provides valid manufacturer traceability. Confirm compliance with relevant environmental standards such as RoHS requirements prior to finalizing acquisition orders for this industrial component.

Selection Notes

Select the LDR31850 when designing systems requiring high-voltage isolation and significant current handling capabilities. Evaluate the thermal resistance characteristics of the chassis mount interface to ensure adequate heat dissipation. Consider the gate trigger parameters and surge current ratings to match the specific demands of the target application circuit design.

Part Context

This component belongs to the Powerex POW-R-BLOK™ family of thyristor modules. These devices are engineered for heavy-duty power conversion tasks. The LDR31850 specifically addresses needs for compact, high-reliability switching solutions in industrial power electronics where space constraints and thermal efficiency are critical design factors.

Replacement Considerations

Consult official cross-reference data for direct equivalents. Verify pinout compatibility and thermal interface dimensions before substituting. Ensure replacement parts meet or exceed the original 1.8 kV voltage and 785 A current specifications.