4-Channel IRF540 MOSFET Switch Module – High-Power DC Driver with Optocoupler IsolationDescription The 4 Channel IRF540 MOSFET Module is an advanced power switching board that allows a low voltage microcontroller (like Arduino, Raspberry Pi, or ESP32) to control up to four high power DC loads independently. Utilizing the robust IRF540 N Channel MOSFET, each channel can handle high voltages and currents with minimal on resistance. Unlike mechanical relays, these solid state switches support High Speed PWM (Pulse Width Modulation), making