2SD402 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 150 V
• Collector-Base Voltage, max: 200 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 40
• Transition Frequency, min: 7 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SD402 might only be marked "D402".The complementary PNP transistor to the 2SD402 is the 2SB547.You can replace the 2SD402 with the 2SC4381, 2SC4382, 2SC4883, 2SC4883A, 2SC5171, 2SD1138, 2SD1138B, 2SD1138C, 2SD1138D, 2SD1264, 2SD1264-P, 2SD1264-Q, 2SD1264A, 2SD1264A-P, 2SD1264A-Q, 2SD401, 2SD401-G, 2SD401-O, 2SD401-R, 2SD401-Y, 2SD401A, 2SD401A-K, 2SD401A-L, 2SD401A-M, 2SD610, 2SD610-Q, 2SD610-R, 2SD610-S, BDX53F, FJP5200, FJP5200O, FJP5200R, FJPF5200, FJPF5200O, FJPF5200R, KSD401, KSD401-G, KSD401-Y, KTD2061, KTD2061O, KTD2061Y, MJE15030, MJE15030G, MJE15032, MJE15032G, MJE5740, MJF15030, MJF15030G, NTE375 or TIP150.