2SD809-K Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 50 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 200 to 400
• Transition Frequency, min: 85 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SD809-K transistor can have a current gain of 200 to 400. The gain of the 2SD809 will be in the range from 135 to 600, for the 2SD809-E it will be in the range from 360 to 600, for the 2SD809-F it will be in the range from 300 to 480, for the 2SD809-L it will be in the range from 135 to 270.Sometimes the "2S" prefix is not marked on the package - the 2SD809-K might only be marked "D809-K".The 2SD1615A (SOT-89) and 2SD1615A-GP (SOT-89) is the SMD version of the 2SD809-K transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD809-K with the 2SD1348, 2SD1348-T, 2SD1682, 2SD1682-T, 2SD1683, 2SD1683-T, 2SD1684, 2SD1684-T, 2SD1722, 2SD1722-R, 2SD1723, 2SD1723-R, 2SD1724, 2SD1724-R, 2SD1725, 2SD1725-R, BD167, BD169, BD189, BD235, BD235G, BD237, BD237G, BDX35, BDX36, BDX37, MJE225, MJE242, MJE244, MJE721 or MJE722.