2SB1123 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 100 to 560
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The 2SB1123 transistor can have a current gain of 100 to 560. The gain of the 2SB1123-R will be in the range from 100 to 200, for the 2SB1123-S it will be in the range from 140 to 280, for the 2SB1123-T it will be in the range from 200 to 400, for the 2SB1123-U it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SB1123 might only be marked "B1123".The complementary NPN transistor to the 2SB1123 is the 2SD1623.You can replace the 2SB1123 with the 2SB1124.