3.3V-12V Optocoupler-Isolated MOSFET Driver Module – 5-36V, 22A Max

The Optocoupler-Isolated MOSFET Driver Module allows a low-voltage control signal from a microcontroller or other control circuit to switch or PWM-control higher-power DC loads.

With a 3.3-12V control input and 5-36V DC load-side operating range, the module is suitable for controlling DC motors, LED lighting, heaters, pumps, solenoids, and other compatible DC loads.

Optocoupler isolation separates the low-voltage control side from the MOSFET power stage, helping reduce electrical interaction between the controller and load circuits.

Technical Specifications

• Module Type: MOSFET DC Power Switch / Driver
• Control Input Voltage: 3.3-12V
• Load-Side Voltage: 5-36V DC
• Maximum Specified Load Current: Up to 22A
• Recommended Cooling: Additional heatsink required above approximately 5A as specified
• Control Current: Approx. 1-5mA depending on control voltage
• Isolation: Optocoupler-Isolated Control Input
• PWM Control: Supported
• Control Connection: 2-Pin, 2.54mm Pitch
• Power Connections: Screw Terminal Blocks
• Status Indicator: Onboard LED
• Logic Compatibility: Suitable for compatible 3.3V and 5V microcontroller control signals

Microcontroller & PWM Control

The module can be controlled using the digital output of a compatible microcontroller such as an Arduino, ESP32, or other MCU.

PWM signals can also be used for applications such as DC motor speed control, LED brightness adjustment, and power regulation of suitable resistive DC loads.

The control signal should remain within the specified 3.3-12V input range.

Optocoupler Isolation

The control section uses an optocoupler to electrically separate the low-voltage control signal from the MOSFET power switching section.

This is particularly useful when a microcontroller needs to control a higher-current load powered from a separate DC supply.

Applications

Suitable for Arduino and microcontroller projects, DC motor control, LED dimming, pumps, solenoid valves, heating elements, robotics, automation systems, DIY electronic projects, and other compatible 5-36V DC loads.

Important Current & Load Note

The 22A figure is the manufacturer's specified maximum rating and should not be interpreted as a guaranteed continuous operating current under all conditions.

According to the supplied specifications, loads above approximately 5A require additional heatsinking. Practical current capability also depends on cooling, ambient temperature, MOSFET losses, PCB traces, terminal connections, wire size, PWM frequency, and load characteristics.

For inductive loads such as motors, solenoids, and relays, appropriate transient/flyback protection should be used where required.

Important Wiring Note

This module is intended for DC loads within the specified 5-36V range. Verify input/output polarity and wiring before applying power.

Do not use it to switch mains AC loads unless the specific module is explicitly rated and designed for that application.

Package Includes

1 × Optocoupler-Isolated MOSFET Driver Module