2Pcs IRF520 24V MOSFET Driver Module for Raspberry Pi Arduino ARM Robotics

IRF520 24V MOSFET Driver Module for Arduino and Raspberry Pi — 2-Pack

The IRF520 MOSFET Driver Module bridges the gap between a low-voltage microcontroller and a high-power DC load. It uses an IRF520 N-channel power MOSFET as an electronic switch — drive the SIG pin HIGH to turn your load on, drive it LOW to turn it off, or connect SIG to a PWM pin for smooth LED dimming and variable motor speed control. The module switches the ground/negative side of your load, includes an onboard blue LED that lights when the MOSFET is on, and uses screw terminal connectors for tool-tightened load connections without soldering. Package includes two modules.

Key Specifications

• MOSFET: IRF520 N-Channel Power MOSFET
• Control (Input) Voltage: 3.3V or 5V logic
• Output Load Voltage: 0 to 24V DC
• Output Load Current: Less than 5A
• Heat Sink Requirement: Required for continuous loads above 1A (not included)
• Switch Type: Low-side — switches the GND/negative side of the load
• PWM Compatible: Yes
• Onboard Indicator: Blue LED — illuminates when SIG is HIGH
• Dimensions (per module): Approx. 33 x 24 mm (1.3 x 0.94 inches) L x W
• Weight (per module): 10g
• Package Quantity: 2 modules

Pinout Reference

• GND (control header): Ground — connect to microcontroller GND and load supply GND
• VCC (control header): Optional 3.3V or 5V for onboard LED — not required for Arduino or Raspberry Pi
• SIG (control header): Signal input — connect to a digital or PWM output pin. HIGH = load on, LOW = load off.
• Vin (screw terminal): Load power supply positive — connect to DC supply positive, up to 24V
• GND (screw terminal): Load power supply negative — also connect to control header GND
• V+ (screw terminal): Load positive terminal — internally connected to Vin
• V- (screw terminal): Load negative terminal (switched) — connected to GND through MOSFET when SIG is HIGH

Basic Wiring (Arduino)

1. Connect GND on the control header to Arduino GND.
2. Connect SIG on the control header to an Arduino digital or PWM pin (e.g., pin 9).
3. Connect your load power supply positive to Vin on the screw terminals.
4. Connect your load power supply negative to GND on the screw terminals — also tie to Arduino GND.
5. Connect the positive terminal of your load to V+.
6. Connect the negative terminal of your load to V-.

Use digitalWrite(9, HIGH) to turn the load on and digitalWrite(9, LOW) to turn it off. For PWM, use analogWrite(9, value) where value is 0 (off) to 255 (full power).

Important Notes — Read Before Use

• Flyback diode required for inductive loads. When switching DC motors, solenoid valves, or relays, always add a flyback diode across the load — cathode to V+, anode to V-. Without it, back-EMF voltage spikes when the load de-energises can permanently destroy the MOSFET. A 1N4007 diode works for most applications.
• Heat sink required above 1A continuous. Attach a small aluminium heat sink to the IRF520 MOSFET for any load drawing more than 1A continuously. Running without one causes overheating and failure. Heat sink is not included.
• DC loads only. Never use this module to switch AC mains voltage (120V or 240V). For AC switching, use a relay module or solid-state relay.
• Common ground required. The GND on the control header and the GND on the load screw terminals must be connected together for proper operation.

What's in the Box

• 2x IRF520 24V MOSFET Driver Modules