2SD1191 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 70 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 35 W
• DC Current Gain (h_fe): 2000
• Transition Frequency, min: 20 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 2SD1191 might only be marked "D1191".The complementary PNP transistor to the 2SD1191 is the 2SB881.You can replace the 2SD1191 with the 2SD1192, 2SD1277, 2SD1277-P, 2SD1277-Q, 2SD1277A, 2SD1277A-P, 2SD1277A-Q, 2SD1415, 2SD1415A, 2SD1826, 2SD1827, 2SD633, 2SD634, 2SD635, MJF6388, MJF6388G or TTD1415B.