High current isolated base dual thyristor and diode modules

17th September 2013

IXYS

Nat Bowers

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IXYS has introduced an extensive range of new high current isolated base dual thyristor and diode modules. The new range of devices is based on the same 60mm die used in the largest of IXYS UK’s range of single device isolated base modules. Typical applications include industrial drives, soft starts, welding and all types of front end rectification needs.

Construction of these modules is an ‘all pressure contact’ design with the die alloyed to a metallic disc and clamped between substantial internal copper electrodes for optimum thermal resistance to the isolated base, base plate is copper.

The new devices are available with eight different configurations of Diode, Thyristor and thyristor/diode combinations, including a new ‘MCR’ type which allows a parallel mounting with a conventional MCC dual thyristor device to construct a double AC switch.

Thyristor and diode/thyristor modules are available with current ratings of 500A to 720A per device and voltage ratings from 1400V to 3600V. All diode devices are rated at 1080A and voltages from 1800V to 2800V. Device base plate is 7 inches (180mm) by 2.8 inches (71mm) with a maximum module height of 3.3 inches (84mm); module weight is 7.7 pounds (3.5kg).

“Isolated base modules are the simplest way of mounting a device to a flat cooler and these new modules extend the upper current limit where this can be applied. In applications where ease of mounting is the key factor in production, these are the best solutions at this current rating, eliminating the need for individual clamps and the addition of discrete components to give isolation from the cooling system,” commented Frank Wakeman, IXYS UK’s Marketing and Technical Support Manager.