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Thyristor Module
Thyristor Module
Luminious Sales has introduced a light weight thyristor module under its trade name LSI. The basic concept of this power semiconductor module is to eliminate failure of power device due to mismatching and repeated expansion at solid interface between silicon and metal when it draws more than 40 amp current. In this case the metal base plate is replaced by DCB (direct copper bonded) plate which matches the thermal expansion co-efficient with thyristor chips. This method also provides lower thermal junction to case resistance. Type LSTT is available in the current range of 48 A, 60 A, 80 A, 95 A and 110 A, with blocking peak inverse voltage up to 1,600 V. Type LSTT 150 PB has a capacity of 95 amp average current with 1,200 volts PIV. It withstands surge current of 2,000 amp at 25_C with junction to case thermal resistance 0.14_C per watt. The slop resistance is as low as 2 milli-ohms. In this module selection dv/dt up to 1 000 V is possible. This module having heat transfer through aluminium oxide ceramic isolated base plate has numerous applications like UPS, DC motor control, AC motor soft starters, temperature controls (for oven, furnaces, chemical processes), and professional light dimming (for studios, theatres, etc.)