2SD1718-S 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): 80 to 160
• 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-S transistor can have a current gain of 80 to 160. The gain of the 2SD1718 will be in the range from 60 to 200, for the 2SD1718-P it will be in the range from 100 to 200, for the 2SD1718-Q it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1718-S might only be marked "D1718-S".The complementary PNP transistor to the 2SD1718-S is the 2SB1163-S.You can replace the 2SD1718-S with the 2SC3281, 2SC3281O, 2SC3519A, 2SC3519A-O, 2SC3519A-P, 2SC3519A-Y, 2SC3856, 2SC5200, 2SC5200N, 2SC5200O, 2SC5242, 2SC5242O, 2SC5358, 2SC5358-O, 2SC5949, 2SC5949-O, 2SC6011, 2SC6011A, 2SC6011A-O, 2SC6011A-P, 2SC6011A-Y, 2SD1313, 2SD2155, 2SD2155-O, FJA4313, FJA4313O, FJL4315, FJL4315O, KTC5200, KTC5200A, KTC5200AO, KTC5200O, KTC5242, KTC5242A, KTC5242AO, KTC5242O, MJL4281A, MJL4281AG, MJW3281A, MJW3281AG, NTE2328 or TTC5200.