Product Name : Phase Control Thyristor SCR;Model : KP100A;Average Forward Current : 100A Repetitive Peak Reverse Voltage(VRRM) : 1600V;Thread Diameter : 15.3mm / 0.6 inch Main Body Size : 31 x 31 x 50mm / 1.2 inch x 1.2 inch x 2 inch(L x W x H);Overall Height : 220mm / 8.6 inch Material : Metal, Ceramic; Net Weight : 320g Stud type phase control thyristor or silicon control rectifier (SCR) features metal case with ceramic insulator. Typical Applications: Machine tool controls, Battery chargers, Motor controllers, Welder Phase control. Package Content : 4 x Phase Control Thyristor SCR Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.