MMBT4126 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -4 V
• Collector Current − Continuous, max: -0.2 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 120 to 360
• Transition Frequency, min: 250 MHz
• Noise Figure, max: 4 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The MMBT4126 transistor is marked as "K2B".You can replace the MMBT4126 with the 2SA1036, 2SA1366, 2SA1518, 2SA1519, 2SA1520, 2SA1521, BC807, BC808, BCW67, BCW68, BCX17, KTA1505, KTA1505S or MMBT200.