ICOP’s Reliability LAB - EMI

For many years, industrial and IT products found under compliances such as CE, FCC, or VCCI have been focused on the EMI standard. In this article, we will introduce how ICOP Technology tests our products, and provide a self-certification to our customers before applying an official certification.

What is EMI?

Electromagnetic Interference (EMI) is the disruption of an electronic device when it’s in an electromagnetic field usually caused by another electronic device.

Content of the EMI standard:

• Test Grade:

  1. Class A: For use in commercial and industrial products.
  2. Class B: For use in residential and consumer level products.

• Test distance: 10 meters between 2 radiation devices.

• Test Frequency:

  1. Conductivity test 150kHz-30MHz
  2. Conducted interference test: 150kHz-30MHz
  3. Radiation test: 30MHz-1000MHz

• EMI Limit:

  	Class A		Class B
  Frequency (MHz)	Limit (dBuV)		Limit (dBuV)
  	Q.P.	Ave.	Q.P.	Ave.
  0.15-0.5	79	66	66-56	56-46
  0.5-5.0	73	60	56	46
  5.0-30	73	60	60	50
  Frequency (MHz)	Limit (dBuV/m)		Limit (dBuV/m)
  30-230	40		30
  230-1000	47		37

• EMI ISN limit:

  Class A
  	Voltage Limit (dBuV)		Current Limit (dBuA)
  	Q.P.	Ave.	Q.P.	Ave.
  0.15-0.5	97-87	84-74	53-43	40-30
  0.5-30	87	74	43	30
  Class B
  	Voltage Limit (dBuV)		Current Limit (dBuA)
  	Q.P.	Ave.	Q.P.	Ave.
  0.15-0.5	84-74	76-64	40-30	30-20
  0.5-30	74	64	30	20