VBsemi GN3401-VB is a P-Channel channel SOT23-3 package field effect transistor. The following are detailed parameter descriptions and application profiles:

- Rated voltage (VDS): -30V
- Rated current (ID): -5.6A
- On-state resistance (RDS(ON)): 47mΩ @ VGS=10V, VGS=20V
- Threshold voltage (Vth): -1V

Application profile:
This device is suitable for a variety of power management and switching circuit applications. Due to its P-Channel characteristics, it is commonly used in power inverters, switching regulators and other circuits that require P-Channel MOSFETs.

Field and module application:
1. Power inverter: used to convert DC power to AC power, commonly found in solar inverters, electric vehicle chargers, etc.
2. Switching regulator: plays a key role in stabilizing voltage output and is widely used in various electronic devices.

Please note that the specific application should be adjusted according to project requirements and design specifications.