AS3BD-M3/H

Overview

The AS3BD-M3/H is a standard recovery rectifier manufactured by Vishay Semiconductors. It features a 200 V repetitive peak reverse voltage and a 3 A average forward current rating. The device utilizes an avalanche-rated design for enhanced robustness against transient events. It is housed in the DO-214AA (SMB) surface-mount package, suitable for automated assembly processes. Key electrical characteristics include a maximum forward voltage of 980 mV at rated current and a low reverse leakage current of 500 nA. The component supports a maximum surge current of 90 A and operates within a junction temperature range of -55 °C to +175 °C.

Feature Summary

• Avalanche-rated construction provides increased reliability under transient overvoltage conditions
• High thermal stability with a maximum operating junction temperature of 175 °C
• Low forward voltage drop contributes to improved system efficiency
• Surface-mount SMB (DO-214AA) packaging facilitates automated PCB placement

Applications

• General-purpose rectification in power supply circuits
• Protection of sensitive electronic components from voltage spikes
• Automotive electronics requiring high-reliability diode solutions

Procurement Notes

Verify the specific suffix configuration when ordering, as variations such as AS3BDHM3_A/H indicate automotive qualification status which may differ from the standard AS3BD-M3/H variant. Confirm package type and reel specifications directly with the manufacturer or authorized distributors to ensure compatibility with existing inventory and production requirements.

Selection Notes

Select this component for applications requiring a balance of high current handling and robust transient protection in a compact surface-mount form factor. The 200 V rating makes it suitable for lower-voltage DC bus applications. Ensure that the circuit design accounts for the 980 mV forward voltage drop to manage thermal dissipation effectively at full load currents.

Part Context

This part belongs to Vishay's eSMP series of surface-mount rectifiers. The AS3BD designation specifically denotes a single-phase, standard recovery diode with avalanche capability. It is designed to replace through-hole equivalents in modern, space-constrained electronic designs while maintaining or improving performance metrics related to switching speed and thermal management.

Replacement Considerations

AS3BDHM3_A/H