CD421690B

SCRs - Modules Overview

The Powerex CD421690B is a Dual SCR/Diode Isolated POW-R-BLOK module rated for up to 1800 Volts and 90 Amperes. It features an electrically isolated heatsink design with a copper baseplate and DBC Alumina insulator, enabling easy mounting on common heatsinks without additional insulation components. The module supports repetitive peak forward and reverse blocking voltages up to 1800 V, with RMS forward currents of 150 A at TC=85°C and average forward currents of 95 A. It includes UL recognition (E78240) and operates within a junction temperature range of -40°C to +125°C.

SCRs - Modules Feature Summary

• Electrically isolated heatsinking utilizing DBC Alumina insulators and copper baseplates
• Low thermal impedance construction designed to improve current capability
• UL Recognized packaging that eliminates the need for additional insulation or clamping components

SCRs - Modules Applications

• Bridge Circuits
• AC & DC Motor Drives
• Battery Supplies
• Power Supplies
• Welders

SCRs - Modules Procurement Notes

Verify the complete nine-digit part number against official documentation before ordering. Confirm voltage ratings and current capabilities match specific application requirements. Ensure mounting torque specifications are adhered to during installation. Check for RoHS compliance status if required by project standards. Validate isolation voltage ratings for safety clearance needs.

SCRs - Modules Selection Notes

Select this module for phase control applications requiring isolated packaging. Consider the 1800V blocking voltage and 90A current ratings for system design. Evaluate thermal resistance values for heatsink sizing. Verify gate trigger parameters for driver compatibility. Assess physical dimensions for mechanical integration constraints.

SCRs - Modules Part Context

This component belongs to the CD42__90B series of Dual SCR/Diode Isolated Modules from Powerex. The series offers various voltage ratings from 800V to 1800V while maintaining a consistent 90A current rating. The CD42 variant specifically denotes the circuit configuration within the POW-R-BLOK family.

SCRs - Modules Replacement Considerations

Consult official datasheets for cross-referencing. Verify pinout compatibility and electrical ratings. Ensure thermal performance matches original design intent.