2SA1408-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -150 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -1.5 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 50 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 2SA1408-O transistor can have a current gain of 100 to 200. The gain of the 2SA1408 will be in the range from 60 to 200, for the 2SA1408-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SA1408-O might only be marked "A1408-O".The complementary NPN transistor to the 2SA1408-O is the 2SC3621-O.You can replace the 2SA1408-O with the 2SA1021, 2SA1021-O, 2SA1249, 2SA1249-R, 2SA1507, 2SA1507-R, 2SB649A, 2SB649A-C or KTA1700.