2SD427-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 120 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 8 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 40 to 80
• Transition Frequency, min: 5 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.The 2SD427-R transistor can have a current gain of 40 to 80. The gain of the 2SD427 will be in the range from 40 to 140, for the 2SD427-O it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SD427-R might only be marked "D427-R".The complementary PNP transistor to the 2SD427-R is the 2SB557-R.You can replace the 2SD427-R with the 2N5038, 2N5038G, 2N5039, 2N5630, 2N5633, 2N5672, 2N6339, 2N6339G, 2N6340, 2N6340G, 2N6341, 2N6341G, 2SC1079, 2SC1079-R, 2SC2337, 2SC2337-S, 2SC2337A, 2SC2337A-S, 2SC2428, 2SC2431, 2SC2433, 2SD424, 2SD424-R, 2SD425, 2SD425-R, 2SD426, 2SD426-R, 2SD552, 2SD552-R, 2SD555, 2SD555-S, 2SD732, 2SD732-C, 2SD733, 2SD733-C, 2SD733K, 2SD733K-C, 2SD745, 2SD745-S, 2SD745A, 2SD745A-S, 2SD745B, 2SD745B-S, 2SD746, 2SD746-S, 2SD746A, 2SD746A-S, 2SD753, BUY69C, BUY70C, MJ15001, MJ15001G, MJ15003 or MJ15003G.