IRKD91/08A

Diode Arrays Overview

The Vishay IRKD91/08A is a high-voltage rectifier diode module from the IRK.91 series, housed in an industrial standard TO-240AA Add-A-Pak Gen V package. It features two silicon diodes connected in series with an isolated case. The device supports a maximum repetitive peak reverse voltage of 800V and handles a maximum average forward current of 100A at a case temperature of 100°C. It withstands non-repetitive surge currents up to 2020A at 50Hz and operates within a junction temperature range of -40°C to 150°C.

Diode Arrays Feature Summary

• Features a thick copper baseplate for improved thermal spreading and mechanical ruggedness.
• Utilizes Direct Bonded Copper (DBC) substrate technology for superior thermal performance.
• Includes a click-stop feature to secure electrical terminals against axial pull-out.
• Provides UL E78996 approval with 3500VRMS isolating voltage capability.

Diode Arrays Applications

• High voltage regulated power supplies
• Lighting circuits
• Temperature control circuits
• Motor speed control circuits
• Uninterruptible Power Supply (UPS) systems

Diode Arrays Procurement Notes

Verify the specific voltage code suffix matches the required blocking voltage, as the IRK.91 series spans 400V to 1600V. Confirm that the 'D' circuit configuration aligns with the intended series connection topology. Ensure mounting hardware complies with the specified torque requirements to maintain thermal interface integrity and prevent mechanical stress on the leads.

Diode Arrays Selection Notes

Select this component when high surge capability and robust mechanical construction are required for general-purpose high voltage applications. The Add-A-Pak Gen V design offers full compatibility with standard TO-240AA heatsinks while providing enhanced tolerance to surface roughness. Consider the thermal resistance characteristics and conduction angles when designing the cooling system to ensure the junction temperature remains within the specified operating range.

Diode Arrays Part Context

This module belongs to the IRK.91 series of thyristor and diode modules manufactured by Vishay General Semiconductor. The series utilizes Generation V Add-A-Pak technology, which combines excellent thermal performance with mechanical durability. These modules are designed for industrial-level applications requiring reliable operation under high voltage and high current conditions.

Diode Arrays Replacement Considerations

IRKC91/08A: Single phase common cathode configuration.

Diode Arrays FAQ

What is the circuit configuration for the IRKD91/08A?

The 'D' designation indicates a configuration of two diodes connected in series.

How does the package design improve thermal performance?

The Add-A-Pak Gen V module uses a Direct Bonded Copper substrate and a solid copper baseplate to enhance thermal spread and allow easier mounting on heatsinks.

What is the maximum non-repetitive surge current rating?

The device can withstand a peak one-cycle forward non-repetitive surge current of 2020A at 50Hz or 2110A at 60Hz.