403CMQ080

Diode Arrays Overview

The Vishay 403CMQ080 is a high-current Schottky rectifier module featuring dual anodes and a common cathode configuration within a TO-244AB isolated package. It supports a maximum average forward current of 400 A per device (200 A per leg) and offers a repetitive peak reverse voltage of 80 V. The component operates reliably up to a junction temperature of 175°C, with a typical forward voltage drop of 0.69 V at 200 A peak current. Its design emphasizes low reverse leakage and high-frequency operation capabilities.

Diode Arrays Feature Summary

• Proprietary barrier technology enables reliable operation up to 175°C junction temperature.
• Center tap module architecture provides an isolated base for enhanced safety.
• Guard ring structure improves ruggedness and long-term reliability.
• High purity epoxy encapsulation ensures mechanical strength and moisture resistance.

Diode Arrays Applications

• High current switching power supplies
• Plating power supplies
• Uninterruptible Power Supply (UPS) systems
• Free-wheeling diodes in converters

Diode Arrays Procurement Notes

Verify the specific voltage suffix against the datasheet ordering table to ensure correct reverse voltage rating. Confirm that the TO-244AB isolated package dimensions match the target heatsink interface requirements. Check thermal resistance specifications relative to the intended mounting surface conditions and grease application to validate thermal management calculations.

Diode Arrays Selection Notes

Select this module when applications require high surge current handling and low forward voltage drop under heavy loads. The isolated base eliminates the need for electrically insulating hardware during installation. Ensure the operating environment stays within the specified -55°C to 175°C junction temperature range for optimal performance and longevity.

Diode Arrays Part Context

This component belongs to the 403CMQ series of high-current Schottky rectifiers designed for industrial-level applications. The series utilizes proprietary barrier technology to minimize reverse leakage at elevated temperatures. The TO-244AB form factor allows for efficient heat dissipation through direct mounting to a heatsink.

Diode Arrays Replacement Considerations

Consult official manufacturer documentation for verified substitute part numbers before implementation.

Diode Arrays FAQ

What is the maximum non-repetitive surge current capability?

The device can withstand a peak one-cycle non-repetitive surge current of 25,500 A for a 5 µs sine pulse or 3 µs rectangular pulse.

How does the package isolation benefit circuit design?

The TO-244AB isolated base allows the module to be mounted directly to a heatsink without requiring additional electrical insulation materials, simplifying assembly and improving thermal transfer.

What is the typical junction capacitance value?

The maximum junction capacitance is 5,500 pF per leg, measured at 5 VDC with a test signal frequency range of 100 kHz to 1 MHz at 25°C.