MPS4124 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: 0.625 W
• DC Current Gain (h_fe): 120 to 360
• Transition Frequency, min: 170 MHz
• Noise Figure, max: 5 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The MPS4124 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The BC848 (SOT-23), BC848W (SOT-323), BC849 (SOT-23), BC849W (SOT-323), MMBT4124 (SOT-23) and MMST4124 (SOT-323) is the SMD version of the MPS4124 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2N4124 is the TO-92 version of the MPS4124.You can replace the MPS4124 with the 2N4124, 2N5172, 2SC815, 2SD227, 2SD471A, KSC815, KSD227, KSD471A, MPS650, MPS650G, MPS6532, MPS6601, MPS6601G, MPS6602, MPS6602G, MPSW01, MPSW01A, MPSW01AG, MPSW01G or PN100.