2SD1288 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 120 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 70 W
• DC Current Gain (h_fe): 60 to 320
• Transition Frequency, min: 55 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 2SD1288 transistor can have a current gain of 60 to 320. The gain of the 2SD1288-P will be in the range from 160 to 320, for the 2SD1288-Q it will be in the range from 100 to 200, for the 2SD1288-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1288 might only be marked "D1288".The complementary PNP transistor to the 2SD1288 is the 2SB965.You can replace the 2SD1288 with the 2SC2579, 2SC2580, 2SC2581, 2SC4278, 2SC4652 or 2SD1289.