2SD1706-Q 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: 15 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 90 to 180
• 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 2SD1706-Q transistor can have a current gain of 90 to 180. The gain of the 2SD1706 will be in the range from 60 to 260, for the 2SD1706-P it will be in the range from 130 to 260, for the 2SD1706-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1706-Q might only be marked "D1706-Q".The complementary PNP transistor to the 2SD1706-Q is the 2SB1155-Q.You can replace the 2SD1706-Q with the 2SD1707 or 2SD1707-Q.