AU1FKHM3/I

Overview

The AU1FKHM3/I is an 800 V, 1 A surface-mount avalanche rectifier diode from Vishay General Semiconductor. Housed in the DO-219AB (SMF) package, it utilizes FRED Pt technology for fast recovery characteristics. The device features a maximum repetitive peak reverse voltage of 800 V and an average forward rectified current of 1 A. It operates within a junction temperature range of -55°C to +175°C and holds AEC-Q101 qualification for automotive applications.

Feature Summary

• Avalanche rated capability for robust operation in inductive switching environments
• Fast Recovery Epitaxial Diode (FRED Pt) technology for efficient high-frequency performance
• Automotive grade qualification ensuring reliability under stringent industry standards

Applications

• Automotive power supply circuits requiring avalanche ruggedness
• High-voltage DC-DC converter stages
• Inductive load protection in automotive electronics

Procurement Notes

Verify the specific suffix 'I' corresponds to the required tape-and-reel packaging configuration as defined by the manufacturer. Confirm that the AEC-Q101 qualification status meets your specific automotive project requirements. Ensure the DO-219AB footprint matches your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when an 800 V blocking capability is required in a compact surface-mount form factor. The avalanche rating makes it suitable for applications with significant voltage spikes or inductive kickback. Compare the 1 A current rating against your circuit's peak load requirements to ensure adequate headroom for thermal management.

Part Context

This part belongs to Vishay's SMF series of small-signal and rectifier diodes. It shares the DO-219AB package with other variants in the AU1F family, such as AU1FKHM3/H. The HM3 designation indicates lead-free construction compliant with RoHS directives, distinguishing it from older non-compliant versions.

Replacement Considerations

Direct substitutes include AU1FKHM3/H, which shares identical electrical specifications but may differ in packaging format. Verify pinout compatibility and thermal resistance characteristics when cross-referencing with other 800 V SMF avalanche diodes from different manufacturers.