APM2301AAC-TRL-VB is a P-Channel field effect transistor in SOT23 package of VBsemi brand. The following are detailed parameters and application introduction:

- Parameters:
- Operating voltage: -20V
- Rated current: -4A
- On-state resistance (RDS(ON)): 57mΩ @ VGS=4.5V, VGS=12V
- Threshold voltage (Vth): -0.81V

- Package:
- SOT23

Applicable fields and module examples:
1. **Power management module:** Since it is a P-Channel transistor, APM2301AAC-TRL-VB can be used for negative electrode control in power management modules and is suitable for negative voltage applications.

2. **Power inverter:** It can be used for switch control of power inverters to support negative voltage and higher current requirements.

3. **Current control module:** Suitable for modules that require negative current control, such as current source, current amplifier, etc.

Please note that specific application requirements and design parameters may need to be adjusted and verified according to actual conditions.