A190B

Overview

The Powerex A190B is a general-purpose silicon rectifier diode from the A190 series, rated for 300 V DC reverse voltage and 250 A average rectified current. It utilizes the DO-205AA (DO-8) stud mount package with a standard recovery speed exceeding 500 ns. The device features a maximum forward voltage of 1.3 V at 250 A and operates within a junction temperature range of -40°C to 200°C.

Feature Summary

• High-current capability with 250 A average rectified current rating
• Robust stud mount construction for efficient thermal management
• Wide operating junction temperature range up to 200°C

Applications

• Industrial power supplies
• Welding equipment
• Motor drives

Procurement Notes

Verify the specific suffix or variant against official datasheets to ensure correct voltage and current ratings. Confirm package compatibility and mounting requirements before integration. Check RoHS compliance status if required by project specifications. Ensure sourcing channels provide authentic components from authorized distributors.

Selection Notes

Select this component for applications requiring high current handling in a compact stud-mount form factor. Consider the 300 V reverse voltage limit when designing circuits with potential voltage spikes. Evaluate thermal resistance and heatsinking needs to maintain junction temperatures within the specified 200°C limit during continuous operation.

Part Context

The A190B belongs to the A190 series of Pic-Pac rectifier diodes manufactured by Powerex Inc. This series is designed for high-reliability industrial applications. The A190B specifically offers a 300 V rating, distinguishing it from other variants like the A190N which may have different voltage specifications.

Replacement Considerations

Check for direct equivalents in the same series with matching voltage and current ratings. Verify pinout and mechanical dimensions for stud-mounted replacements. Ensure thermal characteristics are comparable to maintain system reliability.