2SA818-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -160 V
• Collector-Base Voltage, max: -180 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.05 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-202

Here is an image showing the pin diagram of this transistor.The 2SA818-O transistor can have a current gain of 70 to 140. The gain of the 2SA818 will be in the range from 70 to 240, for the 2SA818-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA818-O might only be marked "A818-O".The complementary NPN transistor to the 2SA818-O is the 2SC1628-O.You can replace the 2SA818-O with the 2SA1195.