A437N

Overview

The Powerex A437N is a standard recovery clamp-on diode rated for 800 V DC reverse voltage and 600 A average rectified current. It features a 3.5 µs maximum reverse recovery time and operates within a junction temperature range of -40°C to 125°C. The component utilizes DO-200AB (B-PUK) packaging and is designed for high-power industrial applications requiring robust clamping capabilities.

Feature Summary

• High current handling capability with 600A average rectified rating
• Clamp-on mounting design for secure installation on busbars
• Standard recovery characteristics suitable for general purpose rectification

Applications

• Industrial motor drives
• Welding equipment rectifiers
• High power DC power supplies

Procurement Notes

Verify the specific voltage rating required, as the A437 series includes variants such as the 1000V A437P. Confirm that the 800V rating of the A437N aligns with your circuit's peak inverse voltage requirements. Ensure compatibility with the clamp-on mounting hardware specified in the official datasheet before procurement.

Selection Notes

Select this component when a high-current, clamp-on diode is needed for busbar integration. Consider the 3.5µs reverse recovery time for switching frequency limitations. Compare against the A437P if higher voltage isolation is necessary. Verify thermal management requirements for the 125°C junction limit.

Part Context

This part belongs to the Powerex A437 series of standard recovery diodes. It shares the same physical package and current rating as other variants in the family but differs in voltage breakdown specifications. The series is designed for heavy-duty industrial semiconductor solutions.

Replacement Considerations

The A437P is a direct mechanical substitute within the same series but offers a higher 1000V rating. Ensure the lower 800V rating of the A437N is sufficient for the application before substituting.