2SC2078E Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 75 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 100 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.The 2SC2078E transistor can have a current gain of 100 to 200. The gain of the 2SC2078 will be in the range from 25 to 200, for the 2SC2078B it will be in the range from 25 to 50, for the 2SC2078C it will be in the range from 40 to 80, for the 2SC2078D it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SC2078E might only be marked "C2078E".The BDP951 (SOT-223) is the SMD version of the 2SC2078E transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC2078E with the 2SC1827, 2SC1986, 2SC2075, 2SC2334, 2SC2527, 2SC3258, 2SC3308, 2SC3346, 2SC3540, 2SC3710, 2SC3710A, 2SC3834, 2SC3851A, 2SC4007, 2SC4007-E, 2SC4008, 2SC4008-E, 2SC4153, 2SD1266A, 2SD1267A, 2SD1268, 2SD1269, 2SD1270, 2SD1271, 2SD1274, 2SD1274A, 2SD1274B, 2SD1355, 2SD1356, 2SD1362, 2SD1407, 2SD1407A, 2SD1408, 2SD1411, 2SD1411A, 2SD2059, 2SD2060, 2SD2374A, 2SD363, 2SD525, 2SD526, 2SD569, 2SD569-K, 2SD613, 2SD613-E, 2SD743, 2SD743-Q, 2SD743A, 2SD743A-Q, 2SD772, 2SD792, 2SD812, 2SD812-P, 2SD823, 2SD856A, 2SD857A, 2SD866, 2SD866A, BD241B, BD241C, BD243B, BD243C, BD537, BD539B, BD539C, BD539D, BD543B, BD543C, BD545B, BD545C, BD799, BD801, BD809, BD937, BD937F, BD939, BD939F, BD941, BD941F, BD951, BD953, BD955, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDT93, BDT93F, BDT95, BDT95F, BDX77, D44H11, D44H11FP, KSC2334, KSD1408, KSD363, KSD526, KSD569, KSD569-Y, KTC2018, KTC2027, KTC2028, KTD2059, KTD2060, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, NTE152, TIP41D, TIP41E, TIP42D or TIP42E.