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Relay (3A)

Relay (3A)

AX22-0014

⏳ This item is currently sold out — a new batch is on its way and will be available soon!

This AX22-sized board drops a Hongfa HK4100F-DC3V-SHG mechanical relay onto a 22 × 22 mm PCB, letting you switch mains-level or high-current loads with a single microcontroller pin. An onboard N-channel transistor driver, fly-back diode, and status LED handle the 3 V coil’s ~90 mA draw and protect your logic lines. Snap it into any AX22 backplane to add power-isolation, actuator control, or hard-off safety to projects coded in Arduino, MicroPython, or MicroBlocks—no extra wiring, no headaches.

$4.49
$4.49
Sale Sold out
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Technical Details

  • - 22 mm × 22 mm square
    - 4× ⌀2.7 mm Mounting Holes
    - 3 A @ 125 VAC
    - 3 A @ 30 VDC
    - 3 V coil, ≈ 90 mA pull-in, 178 mW
    - 3.3 V, 5.0 V
    - Arduino IDE Compatible
    - MicroPython Compatible
    - MicroBlocks Compatible

    Material Datasheet 

Pinout

Technical Resources

Relay (3A) - (AX22-0014)
Circuit Schematic 3D Model

PCB FRONT

PCB BACK

🟢 Live 3D Model

🖱️ Click & drag to rotate

Arduino Example Snippet 

#define RELAY_PIN 1

void setup() {
  pinMode(RELAY_PIN, OUTPUT);
}


void loop() {
  digitalWrite(RELAY_PIN, HIGH);  // turn the Relay on
  delay(1000);                   // wait for a second
  digitalWrite(RELAY_PIN, LOW);   // turn the Relay on
  delay(1000);                   // wait for a second
}