A197B

Overview

The Powerex Inc. A197B is a general-purpose silicon rectifier diode designed for high-current industrial applications. It features a maximum repetitive peak reverse voltage of 200 V and an average rectified output current of 250 A. The device utilizes a stud mount configuration within the DO-205AB package, facilitating robust chassis installation. Key electrical characteristics include a maximum non-repetitive peak forward surge current capability and a specified maximum forward voltage drop under rated load conditions.

Feature Summary

• High current handling capability with 250 A average rectified output rating
• Robust mechanical construction using stud mount technology for secure chassis attachment
• Standard recovery speed suitable for general-purpose power conversion tasks

Applications

• Industrial motor drive rectification circuits
• Welding equipment power supplies
• General-purpose DC power supply input stages

Procurement Notes

Verify the specific datasheet revision to confirm exact thermal resistance values and mounting torque specifications required for your heatsink interface. Ensure that the selected cooling solution maintains the junction temperature within the manufacturer's absolute maximum ratings during continuous operation. Cross-reference the pinout and physical dimensions against your existing PCB or busbar layout to guarantee mechanical compatibility before finalizing the order.

Selection Notes

Select this component when a rugged, high-current single-phase rectifier is required for heavy-duty environments. The 200 V rating limits its use to low-voltage AC inputs or specific DC link configurations. Consider the thermal management requirements carefully, as the 250 A rating demands efficient heat dissipation through the stud terminal to prevent thermal runaway.

Part Context

This part belongs to Powerex's line of high-power discrete semiconductor devices, specifically focusing on standard recovery rectifiers. These components are engineered for durability in demanding power electronics systems where reliability under high stress conditions is critical. The series typically supports various voltage and current combinations to cover diverse industrial needs.

Replacement Considerations

Direct substitutes must match the 200 V reverse voltage, 250 A current rating, and DO-205AB stud mount package. Verify that any alternative component offers comparable surge current capabilities and forward voltage characteristics to ensure circuit performance parity.