BYG21MHM3_A/H

Overview

The BYG21MHM3_A/H is a fast avalanche rectifier diode manufactured by Vishay Semiconductors. It features a single configuration with a maximum average forward rectified current of 1.5 A and a repetitive peak reverse voltage of 1000 V. The device utilizes a glass passivated junction and is housed in a low-profile DO-214AC (SMA) surface-mount package. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 30 A, a maximum reverse current of 1 µA, and a typical reverse recovery time of 120 ns. It operates within a temperature range of -55 °C to +150 °C and holds AEC-Q101 qualification for automotive applications.

Feature Summary

• Fast Avalanche Recovery: Engineered for high-speed switching with soft recovery characteristics to minimize electromagnetic interference.
• High Voltage Rating: Supports up to 1000 V repetitive peak reverse voltage for robust performance in demanding power circuits.
• Automotive Qualified: Meets AEC-Q101 standards, ensuring reliability and durability for automotive electronic systems.
• Glass Passivated Junction: Provides stable operation and protection against mechanical stress and environmental factors.

Applications

• Automotive power supply circuits requiring high reliability
• General-purpose rectification in industrial electronics
• High-frequency switching power supplies
• Freewheeling diodes in inductive load protection

Procurement Notes

Verify the specific suffix 'HM3' confirms lead-free status and halogen-free compliance as per Vishay's standard nomenclature. Confirm the 'A/H' suffix indicates reel packaging quantity and tape-and-reel format. Ensure the component matches the DO-214AC footprint dimensions for PCB layout compatibility. Cross-reference the datasheet revision date to ensure alignment with current manufacturing specifications.

Selection Notes

Select this component when a 1000 V rating is required for high-voltage rectification tasks. Choose the SMA package for space-constrained surface-mount designs. Consider the 120 ns reverse recovery time for applications needing faster switching than standard rectifiers but where ultra-fast alternatives are unnecessary. Verify thermal management requirements align with the 150 °C maximum junction temperature capability.

Part Context

This part belongs to the BYG series of fast avalanche rectifiers from Vishay. It shares the DO-214AC package form factor with other variants like the BYG24GHM3_A/H but differs significantly in voltage rating and recovery speed. The series is designed to replace bulkier through-hole components in modern compact electronics while maintaining high reliability standards.

Replacement Considerations

Direct substitutes include the BYG21KHM3_A/H if lower voltage ratings are acceptable. For higher voltage needs, consider the BYG20JHM3_A/H family variants. Always verify pinout compatibility and thermal dissipation characteristics before swapping with generic equivalents.

FAQ

What is the typical reverse recovery time for the BYG21MHM3_A/H?

The typical reverse recovery time is 120 nanoseconds, which classifies it as a fast recovery rectifier suitable for high-frequency applications.

Is the BYG21MHM3_A/H suitable for automotive applications?

Yes, the component is AEC-Q101 qualified, making it suitable for use in automotive electronic systems requiring high reliability.

What type of junction passivation does this diode use?

It uses a glass passivated junction, which offers enhanced stability and protection against mechanical shock compared to epoxy passivation.