**ST9401SRG-VB**

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

**Package:** SOT23

**Application introduction:**
ST9401SRG-VB is a P—Channel field effect transistor in SOT23 package. Its features include low on-resistance, rated voltage for -20V, rated current of -4A, and performance under different gate-source voltages.

**Application fields and module examples:**
1. **Power switch module:** Due to its low on-resistance and moderate rated voltage, ST9401SRG-VB can be used in power switch modules to improve power conversion efficiency.

2. **Battery protection:** In battery protection modules that require P-Channel MOSFET, effective battery protection is achieved by controlling current and voltage.

3. **Signal amplifier:** Used in signal amplifier modules that require P-Channel MOSFET, it helps to achieve signal conditioning and amplification.

Please select the appropriate application field based on the specific circuit design and parameter matching.