Gyd9e Datasheet
She soldered it to a breakout board. Wired Pin 1 to nothing. Pin 3 to ground. Pin 2 to 3.3V.
The GYD9E is excellent for turning devices on and off. By connecting the Source to your power rail and the Drain to your load, you can toggle the load by pulling the Gate low (for a P-Channel MOSFET). This is common in battery-powered devices to extend battery life by cutting power to idle subsystems. gyd9e datasheet
The GY series is characterized by high temperature resistance and long life cycles, often used in power supplies and motor controllers. Capacitance Range She soldered it to a breakout board