2SD1685 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 20 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 120 to 560
• Transition Frequency, min: 120 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 2SD1685 transistor can have a current gain of 120 to 560. The gain of the 2SD1685-E will be in the range from 120 to 200, for the 2SD1685-f it will be in the range from 160 to 320, for the 2SD1685-G it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SD1685 might only be marked "D1685".You can replace the 2SD1685 with the 2SD826.