BY229B-400HE3/81

Overview

The BY229B-400HE3/81 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 400 V and an average rectified forward current (Io) of 8 A. The device utilizes a TO-263AB package for surface mount installation. Key electrical characteristics include a reverse leakage current of 10 µA at 400 V and a fast recovery speed with a maximum reverse recovery time (trr) of 145 ns. The junction operating temperature range extends from -65°C to 175°C.

Feature Summary

• High-speed rectification capability with fast recovery characteristics suitable for efficient power conversion applications.

Applications

• General purpose rectification in power supply circuits
• DC-DC converter output stages
• Freewheeling diode applications in inductive load switching

Procurement Notes

Verify the specific suffix /81 corresponds to the required tape-and-reel packaging configuration, as suffixes often dictate reel size or handling specifications rather than electrical performance. Confirm RoHS compliance status and environmental declarations against the latest manufacturer datasheet revision to ensure adherence to current regulatory standards for your region.

Selection Notes

Select this component when an 8 A current rating and 400 V blocking voltage are required in a surface-mount TO-263AB footprint. Ensure the application's thermal management strategy supports the specified junction temperature limits. Compare reverse recovery time requirements against alternative Schottky or standard rectifier options if lower forward voltage drop is prioritized over switching speed.

Part Context

This part belongs to the BY229B series of high-current rectifiers from Vishay. The series offers various voltage ratings including 200 V, 400 V, and 800 V variants, all sharing the same 8 A current capacity and TO-263AB package form factor. The HE3 designation indicates enhanced efficiency and reliability features consistent with Vishay's green product line standards.

Replacement Considerations

Direct substitutes include other 8 A, 400 V rectifiers in TO-263AB packages such as those from Onsemi or STMicroelectronics. Verify pinout compatibility and thermal resistance values before substitution. Cross-reference with Vishay's internal replacement list for exact functional equivalents.