A390N

Overview

The Powerex Inc. A390N is a standard silicon rectifier diode designed for high-power applications. It features a maximum repetitive peak reverse voltage of 800 V and an average forward rectified current rating of 400 A. The device utilizes a DO-200AA (R62) clamp-on package, facilitating secure mechanical mounting. Key electrical characteristics include a maximum forward voltage drop of 1.7 V at 800 A and a typical reverse leakage current of 50 mA at the rated voltage. The component operates within a junction temperature range of -40°C to +200°C.

Feature Summary

• High current handling capability with a 400 A average rectified current rating
• Robust voltage blocking performance up to 800 V DC reverse voltage
• Durable DO-200AA R62 clamp-on package for reliable chassis mounting
• Extended thermal operating range supporting junction temperatures up to 200°C

Applications

• Industrial power supply rectification
• DC motor drive circuits
• Welding equipment power stages
• Inverter input rectifiers

Procurement Notes

Verify the specific suffix codes against the manufacturer datasheet to confirm exact electrical tolerances and packaging variations. Ensure the procurement documentation explicitly states compliance with RoHS3 standards. Confirm that the received components match the DO-200AA physical dimensions for proper clamp installation. Validate the part number against official Powerex catalogs to avoid counterfeit or obsolete stock.

Selection Notes

Select this component when designing circuits requiring high surge current tolerance and robust mechanical stability in clamp-on configurations. The 800 V rating provides sufficient margin for standard three-phase bridge applications. Consider the 1.7 V forward voltage drop for thermal management calculations in high-current paths. Ensure the mounting hardware supports the specific R62 flange geometry for optimal heat dissipation.

Part Context

The A390N belongs to the Powerex R62 series of high-power silicon rectifiers. This series is engineered for demanding industrial environments where reliability under high thermal stress is critical. The DO-200AA package is a industry-standard form factor for clamp-on mounting, allowing for efficient integration into large-scale power conversion systems without complex soldering processes.

Replacement Considerations

Cross-reference with other R62 series variants such as the A390B for lower voltage requirements. Verify pinout compatibility and thermal resistance values when substituting with equivalent parts from other manufacturers. Ensure the replacement device meets or exceeds the 400 A current rating and 800 V blocking voltage specifications.