LD431450

Overview

The LD431450 is a dual diode rectifier module manufactured by Powerex Inc. under the POW-R-BLOK series. It features two silicon elements connected in series within an electrically isolated package. The device supports a maximum repetitive reverse voltage of 4500V and provides a continuous average forward current rating of 430A. Designed for high-power industrial applications, it utilizes compression-bonded elements on a metal baseplate to ensure low thermal impedance and reliable operation under demanding electrical loads.

Feature Summary

• Electrically isolated heatsinking capability for simplified mounting on common heat sinks
• Aluminum nitride isolator providing robust dielectric strength between terminals and base
• Compression bonded elements ensuring low thermal impedance and improved current handling

Applications

• Industrial motor drives requiring high-current rectification
• DC power supply systems with isolation requirements
• Inverter circuits in renewable energy conversion systems

Procurement Notes

Verify the specific suffix codes against official Powerex documentation to confirm exact voltage and current ratings, as variations may exist within the LD4__45 family. Ensure compatibility with required isolation standards and mechanical mounting dimensions before procurement. Cross-reference datasheets for thermal resistance values relevant to your specific cooling configuration.

Selection Notes

Select this component based on the 4500V blocking voltage and 430A current capacity requirements. Evaluate the thermal management strategy considering the module's low thermal impedance characteristics. Confirm that the application environment supports the specified operating temperature range and that the isolated package design meets the system's safety insulation needs.

Part Context

This part belongs to the POW-R-BLOK Dual Diode Module family from Powerex, designed for general-purpose rectification up to 4000-4500V levels. These modules are recognized by Underwriters Laboratories (UL) and are engineered for durability in high-power electronic conversions where electrical isolation and efficient heat dissipation are critical performance factors.

Replacement Considerations

Direct substitutes must match the 4500V/430A specifications and dual-diode configuration. Verify pinout compatibility and thermal interface requirements. Consult Powerex technical support for validated alternative part numbers within the same isolation class.