2SD1289-Q 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: 8 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 60 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 2SD1289-Q transistor can have a current gain of 100 to 200. The gain of the 2SD1289 will be in the range from 60 to 320, for the 2SD1289-P it will be in the range from 160 to 320, for the 2SD1289-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1289-Q might only be marked "D1289-Q".The complementary PNP transistor to the 2SD1289-Q is the 2SB966-Q.You can replace the 2SD1289-Q with the 2SC2563, 2SC2579, 2SC2580, 2SC2581, 2SC2706, 2SC4278, 2SC4278-E, 2SC4652, 2SC4652-E, 2SD1046, 2SD1046-E, 2SD1047, 2SD1047-E, 2SD1047C, 2SD1717, 2SD1717-P, 2SD1718, 2SD1718-P, 2SD2052, 2SD2052-P, 2SD2053, 2SD2053-P, KTD1047, KTD1047-Y, KTD1047B, KTD1047B-Y, MJW3281A or MJW3281AG.