2SD1707 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 130 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 20 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 90 to 260
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3PF

Here is an image showing the pin diagram of this transistor.The 2SD1707 transistor can have a current gain of 90 to 260. The gain of the 2SD1707-P will be in the range from 130 to 260, for the 2SD1707-Q it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SD1707 might only be marked "D1707".The complementary PNP transistor to the 2SD1707 is the 2SB1156.