2SD2155 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 180 V
• Collector-Base Voltage, max: 180 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 150 W
• DC Current Gain (h_fe): 55 to 160
• Transition Frequency, min: 10 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SD2155 transistor can have a current gain of 55 to 160. The gain of the 2SD2155-O will be in the range from 80 to 160, for the 2SD2155-R it will be in the range from 55 to 110.Sometimes the "2S" prefix is not marked on the package - the 2SD2155 might only be marked "D2155".The complementary PNP transistor to the 2SD2155 is the 2SB1429.You can replace the 2SD2155 with the 2SC3281, 2SC3519A, 2SC3519A-O, 2SC3519A-P, 2SC3519A-Y, 2SC5200, 2SC5200N, 2SC5242, 2SC5358, 2SC5949, 2SC6011, 2SC6011A, 2SC6011A-O, 2SC6011A-P, 2SC6011A-Y, 2SD1313, FJA4313, FJL4315, KTC5200, KTC5200A, KTC5242, KTC5242A, MJW3281A, MJW3281AG or NTE2328.