IRKT41/08A

Overview

The Vishay IRKT41/08A is a thyristor/diode module from the IRK.41 series, rated for 800 V repetitive peak off-state voltage and 45 A average on-state current at 85°C case temperature. It features a TO-240AA compatible ADD-A-Pak Gen V package with a solid copper baseplate for enhanced thermal spreading and mechanical ruggedness. The device provides 3500 VRMS isolation voltage and supports junction temperatures up to 125°C.

Feature Summary

• High surge capability with thick aluminum die and double stick bonding
• Direct Bonded Copper substrate combined with a solid copper baseplate for superior thermal performance
• Elimination of hard mold to prevent direct stress on leads
• Electrical terminals secured against axial pull-out via a click-stop feature

Applications

• High voltage regulated power supplies
• Lighting circuits
• Temperature control circuits
• Motor speed control circuits
• UPS systems and battery chargers

Procurement Notes

Verify the specific suffix 'S90' if a critical rate of rise of off-state voltage (dv/dt) of 1000 V/µs is required; standard versions are rated at 500 V/µs. Confirm that the ordering code includes the correct voltage and current designators matching the application requirements. Ensure mounting torque specifications are strictly followed to maintain thermal interface integrity.

Selection Notes

Select this component for general purpose high voltage applications requiring industrial standard packaging. Consider the 45 A average current rating relative to the expected conduction angle and case temperature derating curves. Evaluate the need for auxiliary cathodes or specific dv/dt ratings based on circuit switching speeds and load characteristics.

Part Context

This module belongs to the IRK.41 and IRK.56 series manufactured by Vishay General Semiconductor - Diodes Division. It utilizes the Generation V Add-A-Pak technology, which integrates a Direct Bonded Copper substrate with a solid copper baseplate. The series is designed for robust industrial environments with high thermal cycling tolerance.

Replacement Considerations

IRKT56/08A

FAQ

What is the maximum critical rate of rise of off-state voltage (dv/dt)?

The standard version has a maximum dv/dt of 500 V/µs. An optional S90 suffix indicates a higher rating of 1000 V/µs.

How is the electrical terminal connection secured?

The electrical terminals are fixed to the module housing via a click-stop feature designed to secure them against axial pull-out.

What is the recommended mounting procedure regarding torque?

A mounting compound is recommended, and the torque should be rechecked after a period of 3 hours to allow for the spread of the compound.