AU3PG-M3/86A

Overview

The AU3PG-M3/86A is a single avalanche rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum repetitive peak reverse voltage of 400 V and an average forward rectified current of 1.7 A. The device utilizes the eSMP package, specifically TO-277A (SMPC), for surface mount installation. Key electrical characteristics include a maximum forward voltage of 2.1 V at the rated current and a fast recovery time of 50 ns. The component supports a maximum surge current of 30 A and operates within a junction temperature range of -55°C to +175°C.

Feature Summary

• Incorporates avalanche ruggedness capability for enhanced robustness against transient voltage events
• Utilizes Fast Recovery technology with a 50 ns recovery time for efficient high-frequency switching applications
• Designed in the compact eSMP (TO-277A) surface-mount package to facilitate automated assembly and space-constrained layouts

Applications

• High-voltage DC-DC converter circuits requiring avalanche-rated components
• Flyback transformer rectification in offline power supplies
• Snubber circuits for protecting semiconductor switches from voltage spikes
• Free-wheeling diodes in inductive load switching applications

Procurement Notes

Verify the specific suffix configuration to ensure compatibility with required packaging formats such as reel or cut tape. Confirm that the avalanche rating aligns with the system's energy dissipation requirements. Check RoHS compliance status if restricted substances are mandated. Validate the thermal management strategy for the TO-277A package under maximum load conditions to maintain junction temperatures within specified limits during operation.

Selection Notes

Select this component when circuit designs demand both fast recovery performance and avalanche energy handling capabilities in a compact surface-mount form factor. The 400 V rating suits medium-voltage applications, while the 1.7 A current capacity defines its power handling limits. Consider the thermal resistance of the eSMP package relative to the PCB copper area for adequate heat dissipation. Ensure the 50 ns recovery time meets the switching frequency requirements of the target application without excessive reverse recovery charge losses.

Part Context

This part belongs to Vishay's eSMP series of rectifiers, which integrates standard and specialized diode technologies into a unified surface-mount footprint. The AU3PG variant specifically addresses applications requiring avalanche ruggedness, distinguishing it from standard non-avalanche rectifiers in the same package family. This design allows designers to utilize consistent board layouts across different diode functionalities, simplifying supply chain management and assembly processes.

Replacement Considerations

Direct substitutes must match the 400 V reverse voltage, 1.7 A current rating, and TO-277A package. Verify that any replacement also possesses avalanche capability if the original design relies on this feature. Compare forward voltage and recovery times to ensure equivalent electrical performance. Cross-reference pinout configurations to guarantee physical compatibility.