CD421290B

SCRs - Modules Overview

The CD421290B is a POW-R-BLOK dual SCR/diode isolated module manufactured by Powerex Inc. It features a series configuration with one SCR and one diode. The device has a maximum repetitive peak reverse voltage of 1.2 kV and an RMS on-state current rating of 125 A. The average on-state current is rated at 80 A. It supports a non-repetitive surge current of 1600 A at 50 Hz. The module operates within a junction temperature range of -40°C to 125°C and utilizes a standard module package.

SCRs - Modules Feature Summary

• Dual SCR/Diode Isolated Module
• POW-R-BLOK Series
• Series Configuration

SCRs - Modules Applications

• Industrial power control systems
• Inverter circuits
• Motor drive applications

SCRs - Modules Procurement Notes

Verify the specific datasheet for the CD421290B, as official documentation often groups this part under the broader CD42 series specifications. Confirm that the suffix 'B' denotes the correct voltage and current ratings for your design requirements. Ensure compatibility with standard mounting hardware for the POW-R-BLOK module form factor.

SCRs - Modules Selection Notes

Select this component when a combined SCR and diode solution in a single isolated package is required. The 1.2 kV rating suits medium-voltage AC control applications. Verify thermal management capabilities for the 125 A RMS rating against your heat sink design. Check gate trigger parameters against your driver circuit output capabilities.

SCRs - Modules Part Context

This part belongs to the Powerex CD42 series of POW-R-BLOK modules. These modules are designed for high-power industrial applications requiring robust isolation between the main terminals and the baseplate. The series offers various current and voltage combinations to suit different power levels.

SCRs - Modules Replacement Considerations

Check for direct replacements within the CD42 series with matching voltage and current ratings. Cross-reference with other manufacturers' dual SCR/diode modules in similar packages. Ensure pinout compatibility and thermal resistance values match the original design constraints.