2SD843-Y Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 120 to 240
• Transition Frequency, min: 10 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 2SD843-Y transistor can have a current gain of 120 to 240. The gain of the 2SD843 will be in the range from 70 to 240, for the 2SD843-O it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SD843-Y might only be marked "D843-Y".The complementary PNP transistor to the 2SD843-Y is the 2SB753-Y.You can replace the 2SD843-Y with the 2SC2563, 2SC2563-Y, 2SC2578, 2SC2579, 2SC2580, 2SC2581, 2SC2706, 2SC2706-Y, 2SC4278, 2SC4652, 2SD1288, 2SD1289, BD245B, BD245C, BD249B, BD249C, BDV93, BDV95 or TIP35CA.