2SD1718 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): 60 to 200
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SD1718 transistor can have a current gain of 60 to 200. The gain of the 2SD1718-P will be in the range from 100 to 200, for the 2SD1718-Q it will be in the range from 60 to 120, for the 2SD1718-S it will be in the range from 80 to 160.Sometimes the "2S" prefix is not marked on the package - the 2SD1718 might only be marked "D1718".The complementary PNP transistor to the 2SD1718 is the 2SB1163.You can replace the 2SD1718 with the 2SD1313, MJW3281A or MJW3281AG.