QM2403K-VB is a P-Channel field effect transistor produced by VBsemi, using SOT23 package. The following is a detailed parameter description and application introduction:

- **Parameter description: **
- Package type: SOT23
- Channel type: P-Channel
- Rated voltage (VDS): -20V
- Rated current (ID): -4A
- Switch resistance (RDS(ON)): 57mΩ (at VGS=4.5V, VGS=12V)
- Threshold voltage (Vth): -0.81V

- **Applicable fields and module examples: **
- **Field: ** Electronic equipment, power management, analog circuits, etc.
- **Module application examples: **
1. **Power switch module: ** Module suitable for designing load switching power supplies, which can effectively control current.
2. **Signal amplifier:** In analog circuits, it can be used in P-Channel amplifier modules for signal amplification and processing.
3. **Power inverter:** It can be used in power inverter modules, especially for applications that require load control.

The characteristics of the QM2403K-VB make it excel in areas that require current control and power optimization, and is suitable for a variety of circuit designs, especially applications that require P-Channel field effect transistors.