WTC1333-VB, silk screen: VB2290, brand: VBsemi, parameters: SOT23; P-Channel, -20V, -4A, RDS(ON)=57mΩ@VGS=4.5V, VGS=12V; Vth=-0.81V; package: SOT23.

Detailed parameters and application overview:
- **Type:** P-Channel MOSFET
- **Voltage:** -20V
- **Current:** -4A
- **RDS(ON):** 57mΩ @ VGS=4.5V, VGS=12V
- **Threshold Voltage (Vth):** -0.81V
- **Package:** SOT23

**Application:**
Suitable for a variety of applications, including but not limited to:
1. Power Management Modules
2. Battery Protection Circuits
3. Voltage Regulator Modules
4. Switching Converters
5. Wearable Electronics

**Note:** Specific application details may vary based on complete system requirements and design considerations.