# KS0449 keyestudio 3-Channel IRF540NS Large Current MOS Module

![](media/image-20260121112620547.png)

 

## 1. Overview

The keyestudio 3-channel IRF540NS high-current MOS module uses 3-channel MOS switch, which is applied to operate the high-current with small current, similar to a relay element.

It can be applied to drive the Servo, high-current LED light, etc.

When using, input the voltage less than 40V to the terminal block VIN GND, the voltage of V+ block is equal to VIN block.

We can control the HIGH or LOW of NA NB NC pin headers to determine whether connect to ground.

When at HIGH, NA- NB- NC-pin headers are connected to ground, D1 D2 D3 led will turn on; when at LOW, NA- NB- NC-pin headers suspend, D1 D2 D3 led will turn off.

The module comes with four 3mm fixing holes, easy to fix on any other devices.

Special note: this module only supports 5V microcontroller rather than 3.3V microcontroller.

## 2. Technical Details

- Working voltage: VIN terminal is less than DC 40V
- Operating current: less than 10A
- Operating temperature: -20 ~ +60℃
- Dimensions: 66mm * 38mm * 12 mm
- Weight: 22.8 g
- Environmental properties: ROHS

## 3. PINOUTS

![](media/image-20260121112931515.png)

## 4. Connection

![](media/image-20260121112952919.png)

## 5. Test Code

Download code : [Code](./Code.7z)

```c
int BASE = 4 ; 
int NUM = 3; 

void setup()
{
   for (int i = BASE; i < BASE + NUM; i ++) 
   {
     pinMode(i, OUTPUT); 
   }
}

void loop()
{
   for (int i = BASE; i < BASE + NUM; i ++) 
   {
     digitalWrite(i, HIGH);  
     delay(2000);       
   }
   for (int i = BASE; i < BASE + NUM; i ++) 
   {
     digitalWrite(i, LOW);    
     delay(2000); 
   }  
}
```

## 6. Test Result

Done uploading the code, powered on, when NA- NB- NC-pin headers are successively connected to ground, D3 D2 D1 led will successively turn on; then NA- NB- NC-pin headers successively suspend, D3 D2 D1 led will successively turn off, alternately and circularly.

![](media/image-20260121113110807.png)