A390PB

Overview

The Powerex Inc. A390PB is a standard recovery silicon rectifier diode designed for high-power industrial applications. It features a maximum DC reverse voltage (Vr) of 1200 V and an average rectified current (Io) of 400 A. The device utilizes a DO-200AA (R62) clamp-style package, suitable for robust mounting in heavy-duty environments. Key electrical characteristics include a forward voltage (Vf) of 1.7 V at 800 A and a reverse leakage current of 50 mA at the rated voltage. The component operates within a junction temperature range of -40°C to 200°C and exhibits a reverse recovery time (trr) of 6 µs.

Feature Summary

• High current handling capability with 400 A average rectified current rating
• Robust DO-200AA clamp-style package for secure mechanical installation
• Standard recovery speed optimized for general-purpose power conversion
• Wide operating junction temperature range up to 200°C

Applications

• Industrial motor drives and variable frequency drives
• Welding equipment power supplies
• DC power distribution systems
• Uninterruptible power supply (UPS) units

Procurement Notes

Verify the specific suffix configuration against the manufacturer's official datasheet to ensure compatibility with system requirements. Confirm that the DO-200AA package dimensions match the intended heatsink or mounting interface. Check RoHS compliance status if environmental regulations apply to the final assembly. Ensure thermal management solutions support the specified junction temperature limits during operation.

Selection Notes

Select this component when designing circuits requiring high surge current tolerance and reliable performance under continuous load conditions. The 1200 V rating provides sufficient margin for most medium-voltage AC rectification tasks. Consider the 6 µs reverse recovery time when evaluating switching losses in associated circuitry. Ensure the mounting hardware supports the mechanical stresses associated with the clamp-style termination.

Part Context

The A390PB belongs to Powerex's R62 series of high-power silicon rectifiers. This series is engineered for demanding industrial environments where reliability and thermal stability are critical. The DO-200AA form factor is a standard industry footprint for large-discrete power diodes, facilitating integration into existing chassis designs and heat sink architectures used in heavy machinery and power electronics.

Replacement Considerations

Direct substitutes must match the 1200 V Vr, 400 A Io, and DO-200AA package constraints. Verify equivalent reverse recovery times and forward voltage characteristics to maintain circuit efficiency. Cross-reference pinout and mounting hole patterns to ensure physical compatibility without redesigning the PCB or chassis.