SSR-40DA Solid State Relay 40A AC90-480V

Description

What it is

The SSR-40DA is a solid-state relay rated at 40A designed to control AC electrical loads across a wide range of voltages. This device offers a reliable and safe solution for managing high power, with low thermal dissipation.

Features

• Output Voltage: 90-480V AC
• Maximum Current: 40A

What it is for

The SSR-40DA is ideal for home or industrial automation projects, such as creating an intelligent lighting system based on signals from motion sensors. It is compatible with Arduino and other microcontrollers.

Tutorial: How to Use SSR-40DA Solid State Relay

The SSR-40DA is a solid-state relay rated at 40A that allows controlling AC electrical loads from 90V to 480V with low thermal dissipation. It is ideal for home or industrial automation projects where managing high power is necessary.

What you need

• Arduino Uno or compatible
• various connectors
• electrical wire

Steps

1. Check the load voltage to ensure it is between 90V and 480V.
2. Connect the SSR-40DA relay to the Arduino control circuit. The logic interrupt is provided by the Arduino GPIO pin.
3. Connect the load power supply to the ‘L1’ and ‘L2’ terminals of the relay, respectively to the line and output.
4. Verify the connection with a multimeter to ensure there are no short circuits or incorrect connections.
5. Write an Arduino sketch to test the relay’s on/off functionality.
6. Test the entire system, verifying the load operation as the Arduino logic state varies.

Example code

// Uno sketch semplice per controllare il relè SSR-40DA
int relayPin = 7; // Pin di controllo del relè
void setup() {
  pinMode(relayPin, OUTPUT);
}
void loop() {
  digitalWrite(relayPin, HIGH); // Accende il relè
  delay(1000);
  digitalWrite(relayPin, LOW); // Spegne il relè
  delay(1000);
}

Mini project

Create an intelligent lighting system that turns lights on and off intermittently based on signals from a motion sensor.

Common mistakes

• Use an electrical voltage higher than the relay’s tolerance.
• Do not verify proper installation before use.
• Ignore thermal dissipation during the design.
• Omit overload protection in the main circuit.

Recommended accessories

• PIR motion sensors
• Arduino Uno R3
• Molex power connector
• Digital thermometer

Frequently asked questions

What is the minimum and maximum voltage supported?
The minimum voltage is 90V AC, while the maximum is 480V AC. Check the datasheet.

Can I use this relay for DC loads?
No, the SSR-40DA is specifically designed for managing AC electrical loads.