MMBT4124 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.2 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 120 to 480
• Transition Frequency, min: 300 MHz
• Noise Figure, max: 5 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 MMBT4124 transistor is marked as "ZC".You can replace the MMBT4124 with the 2SC3441, 2SC3912, 2SC3913, 2SC3914, 2SC3915, BC817, BC818, BCW65, BCW66, BCX19, BCX20 or FMMT619.