IRKT26/10A

Overview

The IRKT26/10A is a thyristor/diode module from the IRK.26 series, rated for 1000V repetitive peak off-state voltage and 27A average on-state current. It features an ADD-A-pak GEN V package with a thick copper baseplate for mechanical ruggedness and thermal spread. The module includes a built-in diode and offers high surge capability with a non-repetitive peak on-state current of 420A at 8.3ms. It provides 3500VRMS isolation voltage and operates within a junction temperature range of -40°C to 125°C.

Feature Summary

• Thick copper baseplate enhances mechanical stability and improves thermal spreading on heatsinks.
• Direct Bonded Copper substrate ensures excellent thermal performance without hard mold stress.
• Click-stop terminal fixation secures electrical connections against axial pull-out.
• UL E78996 approved with 3500VRMS isolating voltage for industrial safety.

Applications

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

Procurement Notes

Verify the specific dv/dt rating required for the application; standard units have 500 V/µs while S90 suffix variants offer 1000 V/µs. Confirm the package compatibility with TO-240AA standards and ensure mounting torque specifications are met for optimal thermal interface performance. Check for lead-free compliance if RoHS regulations apply to the manufacturing process.

Selection Notes

Select based on the required blocking voltage level, as the series ranges from 400V to 1600V. Consider the thermal resistance characteristics and conduction angle requirements for accurate derating calculations. Ensure the gate trigger parameters align with the driving circuit capabilities, particularly regarding peak gate power and current limits at varying junction temperatures.

Part Context

This component belongs to the IRK.26 series of thyristor/diode and thyristor/thyristor modules manufactured by Vishay General Semiconductor - Diodes Division (formerly International Rectifier). The series utilizes the ADD-A-pak GEN V power module format, designed for high-voltage industrial applications requiring robust mechanical and thermal performance.

Replacement Considerations

IRKN26/10A

FAQ

What is the maximum critical rate of rise of off-state voltage (dv/dt) for the standard IRKT26/10A?

The standard version has a maximum critical rate of rise of off-state voltage of 500 V/µs at a junction temperature of 125°C.

How is the electrical terminal connection secured in this module?

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

What is the RMS isolation voltage between the circuit and the base?

The module provides 2500 VRMS isolation for 1 minute at 50 Hz, or 3500 VRMS for 1 second with all terminals shorted.