• Silicon Power Electronics

Thyristor Module, 500 Amp

SPE Pune, manufacturers of semi-conductor thyristor modules, has introduced the highest capacity of SCR-SCR isolated module, Type SPSS 800 PB. Being of high current (500 A), the module has specific dimensions and hardware. It has 800 A RMS current capacity and 1200 V PIV. These modules are complemented by a full range of thyristor-diode combinations tailored for specific needs of each application. These are offered in any combination of two elements of diode or thyristor units in one module. The internal contacts are carefully chosen to ensure optimum conductivity between semi-conductor and busbar thus ensuring an absolute minimum voltage drop (Vf) through interconnections. In addition, electrical isolation from the base plate is provided by alumina based substrates (called direct copper bond) which offer good thermal conductivity yet substantial voltage isolation capability up to 2,500 V AC RMS. Beryllia has traditionally been used by many manufacturers, but health concerns have made this material highly undesirable. SPSS 800 PB does not contain any Beryllia. Considerable attention has been given to all aspects of the thermal path from semiconductor to baseplate by controlling many mechanical properties which influence the thermal path including surface finish, surface area, flatness, etc. Another significant design point is that SPE modules are epoxy filled with high performance flame retardant silicone based material after final assembly. High power SPSS 800 PB finds application in industries like steel, cable, cement, etc, for welding control, soft start motor controllers, heater control, AC phase control, specialised power supplies, battery chargers, etc.