2SD2012 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 9 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 2SD2012 might only be marked "D2012".The complementary PNP transistor to the 2SD2012 is the 2SB1375.The BDP949 (SOT-223) is the SMD version of the 2SD2012 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD2012 with the 2SC1826, 2SC1985, 2SC1986, 2SC2075, 2SC3179, 2SC3851, 2SC3851A, 2SC4007, 2SC4008, 2SC4550, 2SC4551, 2SC4552, 2SD1134, 2SD1266, 2SD1266A, 2SD1274, 2SD1274A, 2SD1274B, 2SD1761, 2SD2061, 2SD2394, 2SD313, 2SD613, 2SD823, BD203, BD241A, BD241B, BD241C, BD243A, BD243B, BD243C, BD303, BD535, BD537, BD539A, BD539B, BD539C, BD539D, BD543A, BD543B, BD543C, BD545A, BD545B, BD545C, BD797, BD799, BD801, BD807, BD809, BD949, BD951, BD953, BD955, BDT81, BDT81F, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDX77, D44H11, D44H11FP, D44H8, KSD2012, MJE15028, MJE15028G, TIP41D or TIP42D.