2SD424-O 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): 70 to 140
• Transition Frequency, min: 5 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.The 2SD424-O transistor can have a current gain of 70 to 140. The gain of the 2SD424 will be in the range from 40 to 140, for the 2SD424-R it will be in the range from 40 to 80.Sometimes the "2S" prefix is not marked on the package - the 2SD424-O might only be marked "D424-O".The complementary PNP transistor to the 2SD424-O is the 2SB554-O.You can replace the 2SD424-O with the 2N6676, 2N6677, 2SC1586, 2SD753 or MJ10000.