ST9401-VB Detailed parameter description and application introduction:

- **Model: ** ST9401-VB
- **Silkscreen: ** VB2290
- **Brand: ** VBsemi
- **Parameters: **
- Package type: SOT23
- Channel type: P—Channel
- Maximum operating voltage: -20V
- Maximum drain current: -4A
- On resistance: RDS(ON) = 57mΩ @ VGS=4.5V, VGS=12V
- Threshold voltage: Vth = -0.81V

- **Package: ** SOT23

**Application introduction: **
ST9401-VB is a P—Channel trench power MOSFET, suitable for a variety of power management and switching power supply applications.

**Application fields and module examples:**
1. **Power management module:** Due to its P-Channel type, ST9401-VB is particularly suitable for power management modules such as battery charging and discharging protection.

2. **Switching power module:** Due to its low on-resistance and high drain current characteristics, ST9401-VB can be used in switching power modules to provide efficient power switching control.

3. **Portable devices:** Due to the compactness of the SOT23 package, ST9401-VB is very suitable for embedded systems and portable devices such as smartphones, tablets, etc.

Overall, ST9401-VB is a versatile power MOSFET that is suitable for power management and switching power modules in a variety of fields.