AU1FM-M3/H

Overview

The AU1FM-M3/H is a surface-mount ultrafast avalanche rectifier from Vishay General Semiconductor, housed in an SMF (DO-219AB) package. It features a maximum repetitive peak reverse voltage of 1000 V and an average forward current rating of 1.0 A. The device exhibits a maximum instantaneous forward voltage of 1.85 V at 1.0 A and a typical junction capacitance of 8.2 pF. Key electrical parameters include a non-repetitive avalanche energy capability of 20 mJ, a peak forward surge current of 25 A, and a maximum reverse recovery time of 75 ns.

Feature Summary

• Avalanche-rated for robust operation under transient energy stress conditions
• Ultrafast recovery characteristics optimized for high-frequency switching applications
• Glass passivated pellet chip junction ensures long-term reliability
• Low profile package design facilitates automated placement processes

Applications

• General purpose rectification in power supplies
• Inverter circuits
• Converter topologies
• Freewheeling diodes for consumer electronics
• Automotive electronic systems
• Telecommunication equipment

Procurement Notes

Verify the specific ordering code suffix to confirm compliance requirements. The M3 suffix indicates halogen-free and RoHS-compliant construction. The HM3 suffix denotes additional qualification to the AEC-Q101 automotive standard. Ensure the selected variant matches the required environmental and material specifications for the target application.

Selection Notes

Select this component when a single-diode configuration with high-voltage blocking capability is required. The 1000 V rating supports demanding power conversion tasks. The ultrafast recovery time minimizes switching losses in high-frequency environments. Verify that the thermal management strategy accommodates the specified junction-to-ambient thermal resistance values.

Part Context

This part belongs to the eSMP series of surface-mount ultrafast avalanche rectifiers. The AU1FM designation specifically identifies the 1000 V voltage grade within the family. The series shares common mechanical dimensions and packaging standards across different voltage ratings.

Replacement Considerations

Compatible substitutes include AU1FK-M3/H and AU1FJ-M3/H. These variants share identical physical packages and electrical current ratings but offer lower voltage blocking capabilities.

FAQ

Is the AU1FM-M3/H qualified for automotive applications?

No, the M3 suffix does not indicate automotive qualification. The HM3 suffix must be used to obtain a device qualified to the AEC-Q101 standard.

What is the maximum operating junction temperature?

The maximum operating junction temperature is 175 °C.