How to Use EMI Filter - CW1B-10A-L (040): Examples, Pinouts, and Specs

The EMI Filter - CW1B-10A-L (040), manufactured by Shopee, is a high-performance electromagnetic interference (EMI) filter designed to suppress unwanted noise and interference in electronic circuits. This component ensures stable operation of devices and compliance with regulatory standards for electromagnetic compatibility (EMC). Its compact design and robust construction make it suitable for a wide range of applications, including industrial equipment, consumer electronics, and power supplies.

• Suppression of EMI in AC power lines
• Noise filtering in industrial machinery
• Ensuring compliance with EMC standards in consumer electronics
• Protection of sensitive electronic components from high-frequency interference
• Use in power supplies, inverters, and motor drives

The following table outlines the key technical specifications of the EMI Filter - CW1B-10A-L (040):

The EMI filter typically has four terminals for input and output connections. The pin configuration is as follows:

1. Identify Input and Output Terminals: Connect the AC power source to the input terminals (L and N) of the EMI filter. The filtered output will be available at the output terminals (L and N).
2. Mounting: Secure the EMI filter to a chassis or enclosure using screws or mounting brackets. Ensure proper grounding for safety and optimal performance.
3. Wiring: Use appropriately rated wires for the connections. Ensure that the live (L) and neutral (N) lines are correctly connected to avoid malfunction.
4. Testing: After installation, test the circuit to ensure that the EMI filter is effectively suppressing noise and interference.

• Grounding: Always connect the filter's chassis to a reliable ground to enhance noise suppression and safety.
• Current Rating: Ensure that the load current does not exceed the filter's rated current of 10A.
• Temperature: Operate the filter within the specified temperature range (-25°C to +85°C) to prevent damage.
• Compliance: Verify that the filter meets the required EMC standards for your application.

When using the EMI filter to suppress noise in an Arduino-based project, connect the filter between the AC power source and the power supply unit (PSU) that powers the Arduino. This ensures that the Arduino receives clean, noise-free power.

/* Example Arduino Code for Noise-Free Operation
   This code demonstrates a simple LED blink program. The EMI filter ensures
   that the power supply to the Arduino is free from electromagnetic interference.
*/

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output for the onboard LED
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. Can this filter be used with DC circuits?

   • No, the EMI Filter - CW1B-10A-L (040) is designed for AC circuits only.

2. What happens if the filter is not grounded?

   • Without proper grounding, the filter's noise suppression capability will be significantly reduced, and safety may be compromised.

3. Can I use this filter for a 15A load?

   • No, this filter is rated for a maximum current of 10A. Exceeding this limit may damage the filter or cause it to overheat.

4. Is the filter suitable for outdoor use?

   • The filter is not specifically designed for outdoor use. If used outdoors, ensure it is housed in a weatherproof enclosure.

By following this documentation, users can effectively integrate the EMI Filter - CW1B-10A-L (040) into their circuits, ensuring reliable and interference-free operation.