2SD745A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 150 V
• Collector-Base Voltage, max: 150 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 120 W
• DC Current Gain (h_fe): 40 to 200
• Transition Frequency, min: 15 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 2SD745A transistor can have a current gain of 40 to 200. The gain of the 2SD745A-Q will be in the range from 100 to 200, for the 2SD745A-R it will be in the range from 60 to 120, for the 2SD745A-S it will be in the range from 40 to 80.Sometimes the "2S" prefix is not marked on the package - the 2SD745A might only be marked "D745A".The complementary PNP transistor to the 2SD745A is the 2SB705A.You can replace the 2SD745A with the 2N6676, 2SC2337A, 2SC2428, 2SD555, 2SD733K, 2SD745B, 2SD746, 2SD746A, 2SD753, BUY69C or BUY70C.