NTE123A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 75 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 0.4 W
• DC Current Gain (h_fe): 100 to 300
• Transition Frequency, min: 300 MHz
• Noise Figure, max: 4 dB
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the NTE123A is the NTE159M.The BCW66 (SOT-23), DXT2222A (SOT-89), DZT2222A (SOT-223), FJX2222A (SOT-323), FMMT2222A (SOT-23), FMMT2222AR (SOT-23), KN2222AS (SOT-23), KST2222A (SOT-23), KTN2222AS (SOT-23), KTN2222AU (SOT-323), MMBT100 (SOT-23), MMBT2222AT (SOT-523F), MMST2222A (SOT-323), PMBT2222A (SOT-23) and PMST2222A (SOT-23) is the SMD version of the NTE123A transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the NTE123A with the 2N2221A or 2N2222A.