BYM12-400HE3_B/I

Overview

The BYM12-400HE3_B/I is a surface-mount ultrafast rectifier manufactured by Vishay General Semiconductor - Diodes Division. It features a glass-passivated junction and belongs to the BYM12 series, designed for high-efficiency switching applications. The device supports an average forward current of 1 A and offers a repetitive reverse voltage rating up to 400 V. Key electrical characteristics include a maximum reverse recovery time of 50 ns and a peak forward surge current capability of 30 A. The component operates within a junction temperature range of -65°C to +175°C and utilizes the DO-213AB (SMB) package.

Feature Summary

• Ultrafast recovery performance with a typical reverse recovery time of 50 ns for high-frequency efficiency
• Glass-passivated junction structure providing enhanced reliability and cavity-free construction
• High thermal stability supporting operation at junction temperatures up to 175°C
• Robust surge current handling capability rated at 30 A

Applications

• High-frequency DC/DC converters
• Free-wheeling diodes in synchronous rectification circuits
• Snubber circuits in power supplies
• Reverse polarity protection in automotive electronics

Procurement Notes

Verify the specific suffix _B/I against official Vishay documentation to confirm tape-and-reel packaging configuration and marking codes. Ensure compliance requirements such as RoHS and AEC-Q101 qualification align with project specifications. Cross-reference the full part number with manufacturer datasheets to validate pinout orientation and recommended soldering profiles for the DO-213AB package.

Selection Notes

Select this component when designing circuits requiring fast switching speeds and low reverse recovery charge to minimize switching losses. The 400 V reverse voltage rating makes it suitable for medium-voltage AC-DC conversion stages. Consider the 1 A continuous current limit and thermal management requirements for the SMB package when determining heat dissipation strategies in dense PCB layouts.

Part Context

This part belongs to the BYM12 series of surface-mount ultrafast rectifiers from Vishay. The series is characterized by its glass-passivated technology and suitability for high-reliability applications. The BYM12 variants cover a voltage range from 50 V to 400 V, sharing common structural features like the DO-213AB package and ultrafast recovery times around 50 ns.

Replacement Considerations

Publicly confirmed substitute part numbers for BYM12-400HE3_B/I are not available in the provided source material.