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Aim: To study the V-I characteristics of SCR. Apparatus Required: 1. NV6530 SCR Characteristic Trainer. 2. 2mm Patch cords. Circuit Diagram: Model Graph Power Electronics Lab manual. SSIT. - 3 -. Experiment No: 1. DATE: __/__/____. S.C.R. Characteristics. Aim: -. To study the V-I characteristics of S.C.R. Thyristor Characteristics: ‐ A thyristor is a four layer semiconductor device of PNPN structure with three PN junctions. It has three terminal anode, cathode Min VGS voltage that is required for conduction is. “Threshold voltage” (VTH). 5. Repeat the above experiment for different values of. VDS2 = 15V. Silicon-Controlled Rectifier (SCR) Characteristics · Connections are made as per circuit diagram. · Keep the gate supply voltage at some constant value · Vary the Here Va is the anode voltage across thyristor terminals A, K and Ia is the anode current. Typical SCR V-I characteristic. Page 8. 8 | DEPARTMENT OF ELECTRICAL &An SCR is a 4-layer, 3-junction, 3-terminal device. When anode is positive w.r.t cathode, the curve between VAK and IA is called the forward characteristics.