AU1FD-M3/I

Overview

The AU1FD-M3/I is a single ultrafast recovery rectifier manufactured by Vishay Semiconductors, housed in the DO-219AB (SMF) surface-mount package. It features a 200 V repetitive peak reverse voltage and a 1 A average forward rectified current. The device exhibits a maximum forward voltage of 1.5 V at rated current and a low reverse leakage current of 1 µA. Key electrical characteristics include a 75 ns maximum reverse recovery time and a 30 A non-repetitive peak surge current capability.

Feature Summary

• Ultrafast recovery performance with 75 ns reverse recovery time for efficient switching
• Avalanche-rated construction for robustness against transient energy events
• Surface-mount SMF (DO-219AB) packaging for automated assembly integration

Applications

• High-frequency DC-DC converter output rectification
• Free-wheeling diodes in synchronous rectifier circuits
• Snubber circuits in switch-mode power supplies

Procurement Notes

Verify the specific suffix designation to confirm the reel quantity and tape specifications, as manufacturing variations may exist between H and I suffixes. Ensure the component matches the DO-219AB footprint dimensions during PCB layout validation. Cross-reference the datasheet revision date to confirm thermal resistance values and absolute maximum ratings align with your design requirements before finalizing procurement orders.

Selection Notes

Select this component when circuit designs require fast switching speeds combined with avalanche ruggedness in a compact surface-mount form factor. The 200 V rating suits low-voltage high-current applications where standard recovery diodes would cause excessive switching losses. Compare the 1.5 V forward voltage drop against alternative Schottky options if reverse leakage constraints are less critical than turn-off speed.

Part Context

This part belongs to Vishay’s AU1F series of ultrafast rectifiers designed for general-purpose high-efficiency power conversion. The SMF package provides a small footprint suitable for dense consumer electronics and industrial power supplies. It complements other Vishay diode families by offering a balance of speed and voltage handling in a standardized industry-compatible outline.

Replacement Considerations

Direct substitutes include the AU1FM-M3/H for higher voltage ratings or AU1FJ-M3/I for 600 V applications within the same package family.