Product Name: Power Transistor; Model Number: A1941, C5198; Vcbo: 200V Ic: 10A; Pd (Total Power Dissipation): 100W; Package: TO-3P Transistor Type: 2SA1941 (PNP), 2SC5198 (NPN); Body Size (Each): 2 x 1.5 x 0.5cm/0.78" x 0.6" x 0.2"(LxWxT) Hole Diameter: 3.1mm/0.12"; Pin Length: 20mm/0.78" Net Weight: 12g Complementary Silicon High Power Audio Transistors (2SA1941 1 Piece, 2SC5198 1 Piece). APPLICATIONS: High Quality Audio Output Amplifier, Power Amplifier. Package Contents: 2 Transistors Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real one. The measurement allowed error is +/- 1-3cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!