2SD874 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 85 to 340
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The 2SD874 transistor can have a current gain of 85 to 340. The gain of the 2SD874-Q will be in the range from 85 to 170, for the 2SD874-R it will be in the range from 120 to 240, for the 2SD874-S it will be in the range from 170 to 340.Sometimes the "2S" prefix is not marked on the package - the 2SD874 might only be marked "D874".The complementary PNP transistor to the 2SD874 is the 2SB766.You can replace the 2SD874 with the 2SD874A.