MMBT4125 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -4 V
• Collector Current − Continuous, max: -0.2 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 50 to 150
• Transition Frequency, min: 200 MHz
• Noise Figure, max: 5 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23
• Electrically Similar to the Popular 2N4125 transistor

Here is an image showing the pin diagram of this transistor.The MMBT4125 transistor is marked as "ZD".The 2N4125 is the TO-92 version of the MMBT4125.You can replace the MMBT4125 with the 2SA1518, 2SA1519, 2SA1520, 2SA1521, FMMT3905, FMMT551, FMMTA55, KST55 or MMBT4354.