AS3BD-M3/I

Overview

The AS3BD-M3/I is a standard recovery rectifier manufactured by Vishay Semiconductors. It features a single configuration with a maximum repetitive peak reverse voltage of 400 V and an average forward rectified current of 3 A. The device utilizes the DO-214AA (SMB) surface-mount package. Key electrical parameters include a maximum forward voltage of 980 mV at rated current, a peak forward surge current capability of 90 A, and a maximum reverse leakage current of 500 nA. It operates within a junction temperature range of -55 °C to +175 °C.

Feature Summary

• Utilizes avalanche-rated technology for enhanced ruggedness in inductive switching applications
• Designed for high-temperature operation with a maximum junction temperature of 175 °C
• Features low forward voltage drop to minimize conduction losses
• Packaged in the compact DO-214AA (SMB) surface-mount format

Applications

• General-purpose rectification in power supply circuits
• Freewheeling diodes in inductive load switching
• DC-to-DC converter output rectification

Procurement Notes

Verify the specific suffix against official datasheets to confirm voltage rating and package type. Ensure compatibility with RoHS3 directives if required by the design specification. Confirm that the ordering code matches the exact electrical characteristics needed for the target application circuit.

Selection Notes

Select this component when a 400 V blocking capability is required for 3 A continuous current applications. Consider the thermal management requirements associated with the SMB package and the specified forward voltage drop. Evaluate the surge current rating against potential inrush conditions in the specific circuit design.

Part Context

This part belongs to the AS3B series of standard recovery rectifiers from Vishay. The series offers various voltage ratings within the same physical footprint, allowing for design flexibility. The AS3BD variant specifically denotes the 400 V rating within this family of surface-mount diodes.

Replacement Considerations

Cross-reference with other Vishay parts in the AS3B series for different voltage ratings. Verify pinout and thermal characteristics when substituting with components from other manufacturers offering equivalent DO-214AA packages.