CD431690B

SCRs - Modules Overview

The Powerex CD431690B is a Dual SCR POW-R-BLOK module rated for 90 Amperes and up to 1800 Volts. It features an electrically isolated heatsink design with a DBC Alumina insulator and copper baseplate, allowing direct mounting on common heatsinks without additional insulation components. The module provides UL recognition (E78240) and supports RMS forward currents of 150 A at 84°C case temperature. Electrical characteristics include a peak on-state voltage of 1.65 V at 300 A, gate trigger current of 150 mA, and isolation voltages of 3000 Vrms (1 minute) or 3500 Vrms (1 second).

SCRs - Modules Feature Summary

• Electrically isolated heatsinking capability for simplified installation on common heatsinks.
• Construction utilizes DBC Alumina insulator and copper baseplate for low thermal impedance.
• UL recognized component (E78240) ensuring compliance with safety standards.

SCRs - Modules Applications

• Bridge Circuits
• AC & DC Motor Drives
• Battery Supplies
• Power Supplies
• Large IGBT Circuit Front Ends

SCRs - Modules Procurement Notes

Verify the specific voltage rating suffix within the CD43__90B series, as the part number indicates a maximum of 1800 Volts but actual blocking voltage depends on the middle digits. Confirm that the M5 mounting screw torque does not exceed 25 in.-Lb. and module-to-heatsink torque remains within 44 in.-Lb. limits to prevent mechanical damage during assembly.

SCRs - Modules Selection Notes

Select this module for phase control applications requiring high voltage isolation and robust thermal management. Ensure the operating junction temperature stays within -40 to +125 °C. Consider the 150 A/µs di/dt limit for circuit protection design. Verify that the required average forward current aligns with the derating curves provided for specific conduction angles and case temperatures.

SCRs - Modules Part Context

This component belongs to the Powerex Dual SCR Isolated POW-R-BLOK family, designed for phase control applications. The series offers various voltage ratings from 800 to 1800 Volts while maintaining a consistent 90 Ampere current rating and standardized outline dimensions for interchangeability within the same power class.

SCRs - Modules Replacement Considerations

Direct substitutes are not explicitly listed in the datasheet. When evaluating alternatives, match the dual SCR configuration, isolated baseplate construction, and similar electrical ratings such as 1800 V blocking voltage and 90 A average current capacity.