AU1FK-M3/H

Overview

The AU1FK-M3/H is an ultrafast recovery avalanche rectifier manufactured by Vishay General Semiconductor. It features a maximum repetitive peak reverse voltage of 800 V and an average forward rectified current of 1 A. The device utilizes the eSMP series technology and is housed in a compact SMF (DO-219AB) surface-mount package. Key electrical characteristics include a maximum forward voltage of 1.85 V, a peak forward surge current rating of 25 A, and a typical reverse recovery time of 75 ns. It supports a junction temperature range up to 175°C.

Feature Summary

• Incorporates avalanche ruggedness for enhanced reliability under transient conditions
• Utilizes ultrafast recovery technology to minimize switching losses
• Designed for high-temperature operation with a maximum junction temperature of 175°C

Applications

• High-frequency power supply circuits
• Free-wheeling diode applications in DC-DC converters
• Snubber circuits requiring avalanche capability

Procurement Notes

Verify the specific suffix 'H' corresponds to the required tape-and-reel packaging configuration if automated assembly is planned. Confirm RoHS compliance status and REACH SVHC declarations against current regulatory requirements. Ensure the DO-219AB footprint matches the target PCB layout dimensions before finalizing procurement orders.

Selection Notes

Select this component when circuit designs demand both ultrafast switching speeds and avalanche energy handling capabilities. The 800 V rating provides sufficient headroom for standard industrial voltage levels. Consider the 1 A current limit and thermal management requirements associated with the small SMF package for high-power density implementations.

Part Context

This part belongs to Vishay's eSMP series of single ultrafast recovery rectifiers. It shares the DO-219AB (SMF) form factor with other variants in the family, such as the AU1FM and AU1PK models, which differ primarily in their reverse voltage ratings. The series is engineered for space-constrained surface-mount applications requiring robust performance.

Replacement Considerations

Direct substitutes within the same voltage and current class include the AU1FM-M3/H (1000V rating) or AU1PK-M3/H (800V rating). Verify that any alternative maintains the 75 ns reverse recovery time and avalanche ruggedness specifications to ensure circuit compatibility.