The SOT-23 is another popular semiconductor package type. It stands for Small Outline Transistor-23. It's typically used for low power, surface mount devices such as transistors and small-scale integrated circuits.
The SOT-23
The package is quite small, often measuring about 3mm x 1.7mm. It generally has three leads, making it suitable for devices such as single gate logic, op-amps, and low-power transistors.
Despite its small size, the SOT-23 package is designed to be easily handled and placed by automated assembly equipment, making it an excellent choice for high volume manufacturing processes.
As with the SOT-223 package, for specific pin configurations and other details of a particular SOT-23 packaged component, it's best to refer to the specific data-sheet provided by the manufacturer.