2SD809 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): 135 to 600
• 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 transistor can have a current gain of 135 to 600. The gain of the 2SD809-E 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-K it will be in the range from 200 to 400, 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 might only be marked "D809".You can replace the 2SD809 with the BD167, BD169, BD189, BD235, BD235G, BD237, BD237G, MJE225, MJE242, MJE244, MJE721 or MJE722.