LD422243

Overview

The LD422243 is a dual diode rectifier module manufactured by Powerex Inc. under the POW-R-BLOK series. It features an electrically isolated design with a metal baseplate for efficient thermal management. The device contains two silicon elements connected in series, rated for a maximum repetitive reverse voltage of 2200 V and an average output current of 425 A. It operates within a junction temperature range of -40°C to 150°C and utilizes compression bonded elements on an aluminum nitride isolator to ensure low thermal impedance.

Feature Summary

• Electrically isolated construction allows direct mounting to common heatsinks without additional insulators.
• Aluminum nitride isolator provides high dielectric strength and improved thermal conductivity.
• Compression bonded elements enhance mechanical stability and current carrying capability.
• Metal baseplate facilitates effective heat dissipation for high-power applications.

Applications

• Industrial motor drives requiring high current rectification
• DC power supplies and battery charging systems
• Welding equipment power stages

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm exact electrical ratings and pinout configuration. Ensure compatibility with existing cooling infrastructure due to the module's thermal requirements. Confirm RoHS compliance status if required by project specifications. Cross-reference the part number with official Powerex documentation to avoid substitution errors.

Selection Notes

Select this component for applications demanding high current density and reliable isolation. Evaluate the thermal resistance characteristics against the system's heatsink capabilities. Consider the 2200 V rating for safety margins in high-voltage DC circuits. Verify that the package dimensions fit the mechanical constraints of the assembly.

Part Context

This module belongs to the POW-R-BLOK family, which is recognized by Underwriters Laboratories (UL). The series is designed for robust performance in industrial environments, offering a balance of high electrical ratings and compact packaging. The isolated design simplifies system integration by eliminating the need for separate insulation materials between the device and the heatsink.

Replacement Considerations

Consult Powerex technical support for verified cross-references. Ensure any substitute maintains the same voltage, current, and isolation ratings. Verify mechanical footprint compatibility before implementation.