2SD1148 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 140 V
• Collector-Base Voltage, max: 140 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 55 to 160
• Transition Frequency, min: 20 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 2SD1148 transistor can have a current gain of 55 to 160. The gain of the 2SD1148-O will be in the range from 80 to 160, for the 2SD1148-R it will be in the range from 55 to 110.Sometimes the "2S" prefix is not marked on the package - the 2SD1148 might only be marked "D1148".The complementary PNP transistor to the 2SD1148 is the 2SB863.You can replace the 2SD1148 with the 2SC2581, 2SC2706, 2SC2837, 2SC3182, 2SC3182-O, 2SC3280, 2SC3281, 2SC3284, 2SC3519, 2SC3519A, 2SC3519A-O, 2SC3519A-P, 2SC3519A-Y, 2SC3855, 2SC3907, 2SC4468, 2SC5198, 2SC5199, 2SC5200, 2SC5200N, 2SC5242, 2SC5358, 2SC5948, 2SC5949, 2SC6011, 2SC6011A, 2SC6011A-O, 2SC6011A-P, 2SC6011A-Y, 2SD2155, FJA4310, FJA4313, FJL4315, KTC5200, KTC5200A, KTC5242, KTC5242A, MJW3281A, MJW3281AG or NTE2328.