AS4PG-M3/87A

Overview

The AS4PG-M3/87A is an Avalanche diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 400 V and an average rectified current (Io) of 2.4 A. The component is housed in a TO-277A package with Tape & Reel (TR) packaging. It is currently listed as an active product.

Feature Summary

• Engineered for avalanche mode operation to handle repetitive energy pulses
• Designed for robust performance under high-voltage stress conditions

Applications

• Snubber circuits for switching power supplies
• Protection against voltage spikes in inductive load switching
• Clamping applications in high-voltage DC link circuits

Procurement Notes

Verify the specific suffix /87A corresponds to the required Tape & Reel packaging configuration. Confirm that the 400 V rating and 2.4 A current capacity align with the target circuit's peak inverse voltage and average current requirements. Ensure the TO-277A footprint matches the PCB design constraints.

Selection Notes

Select this component when avalanche-rated protection is required rather than standard Zener breakdown. The 400 V reverse voltage provides adequate margin for many industrial power applications. The 2.4 A average current rating supports moderate power dissipation needs in snubber or clamp configurations.

Part Context

This part belongs to Vishay's general-purpose avalanche diode lineup, distinct from their fast recovery or TVS offerings. It utilizes the TO-277A surface-mount package, which offers improved thermal performance compared to smaller SMD packages while maintaining a compact form factor suitable for modern power electronics assemblies.

Replacement Considerations

Check for direct substitutes within the AS series such as AS4PJHM3_A/I if pinout compatibility is critical. Verify that alternative avalanche diodes meet the same 400 V Vr and 2.4 A Io specifications without compromising thermal resistance.