BYG21M-M3/TR3

Overview

The BYG21M-M3/TR3 is a fast avalanche rectifier diode manufactured by Vishay General Semiconductor. It features a 1.5 A average forward current rating and a 1000 V repetitive peak reverse voltage capability. The device exhibits a fast reverse recovery time of 120 ns, making it suitable for high-frequency applications. It utilizes the DO-214AC (SMA) surface-mount package with glass passivated junctions. Key electrical characteristics include a maximum non-repetitive peak forward surge current of 30 A and a low reverse leakage current of 1 µA at rated voltage.

Feature Summary

• Controlled avalanche characteristics designed to withstand energy breakdown without failure
• Glass passivated junction provides reliable protection against voltage transients
• Fast reverse recovery time ensures efficient operation in high-speed switching circuits

Applications

• General purpose rectification in power supplies
• Freewheeling diodes in inverters and converters
• High frequency rectification in consumer electronics

Procurement Notes

Verify the specific suffix configuration when ordering, as packaging variations exist within the BYG series. Confirm RoHS compliance status and AEC-Q101 qualification requirements against the specific datasheet revision. Ensure the DO-214AC footprint matches the target PCB design. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component for designs requiring high voltage blocking capabilities combined with fast switching speeds. The avalanche-rated construction allows for robust performance in inductive load environments where voltage spikes are common. Consider the thermal management requirements associated with the SMA package for continuous current loads.

Part Context

This component belongs to the Vishay BYG series of standard avalanche SMD rectifiers. The series covers a range of voltage ratings from 200 V to 1600 V, all sharing similar mechanical profiles and electrical behaviors. The M3 suffix typically denotes lead-free and halogen-free compliance, aligning with modern environmental standards for electronic components.

Replacement Considerations

Direct substitutes may include other 1.5 A, 1000 V fast recovery diodes in the SMA package. Verify that any replacement maintains equivalent avalanche energy ratings and reverse recovery times to ensure circuit reliability.