AS1FK-M3/I

Overview

The AS1FK-M3/I is a single avalanche-rated rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features an 800 V maximum repetitive reverse voltage and supports a continuous forward current of 1.5 A. The device utilizes the DO-219AB (SMF) surface-mount package. Key electrical characteristics include a maximum forward voltage of 1 V at 1.5 A, a peak non-repetitive surge current capability of 30 A, and a typical reverse leakage current of 70 nA at rated voltage. The component is designed for operation within a junction temperature range of -55°C to +175°C.

Feature Summary

• Incorporates avalanche ruggedness for enhanced reliability in inductive switching applications
• Utilizes glass passivation to ensure stability under harsh environmental conditions
• Designed for high-speed switching with fast recovery characteristics

Applications

• High-voltage DC-DC converter circuits
• Inductive load protection stages
• General-purpose rectification in power supplies

Procurement Notes

Verify the specific suffix against official datasheets to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with RoHS directives if required by your manufacturing standards. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability 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 circuits prone to voltage transients. Compare its 1.5 A current handling against alternative packages like SMA or SMB if higher thermal dissipation is needed for your specific thermal management design.

Part Context

This device belongs to the AS1F series of surface-mount rectifiers from Vishay. It shares the DO-219AB footprint with other variants in the family but is distinguished by its specific 800 V voltage rating and avalanche capability. This series is engineered to replace larger through-hole components in space-constrained modern electronic designs.

Replacement Considerations

Direct substitutes include AS1FK-M3/H and AS1FK-H. Verify that replacement parts maintain the same avalanche rating and forward current specifications to ensure circuit integrity.