1. **Low-power electronic devices:** Due to its low drain current and low power consumption, KDV-VB is suitable for portable electronic devices that focus on energy efficiency and battery life, such as smart watches, portable audio devices, etc. 2. **Power management module:** As a P-Channel MOSFET, KDV-VB can be used for power switching and current control in power management modules to ensure efficient power conversion and stable power output. 3. **Signal amplifier and modulator:** Due to its SOT23-3 package type, it is suitable for applications that require signal amplification or modulation in a limited space, such as RF modules in communication equipment. 4. **Wearable devices:** In wearable devices that require small and lightweight, KDV-VB can be used to control current, switch power, and other power optimization applications.