What is IEC 61000-4-3?
Editorial Team - EMC Directory
The IEC 61000-4-3 is an EMC standard by the International Electrotechnical Commission on the immunity requirements of electrical and electronic equipment to radiated electromagnetic energy. It establishes test levels and the required test procedures for evaluating the immunity of electrical and electronic equipment when subjected to radiated radio-frequency electromagnetic fields.
Every type of electronic and electrical equipment emits an electromagnetic field to some degree unintentionally or intentionally. Radios, TVs, and radar transmitters emit strong electromagnetic fields which can hamper other equipment’s operation if they are in its proximity. When conductors such as cables, wires, and PCB traces are exposed to RF fields, RF currents and voltages are coupled into the conductors. These stray currents and voltages are nothing but the noise that causes errors and malfunctions in the analog or digital semiconductors.
The IEC 61000-4-3 focuses on the limits of these RF emissions of the equipment. Following is the test equipment required for the standard: The IEC 61000-4-3 focuses on the limits of these RF emissions of the equipment. Following is the test equipment required for the standard:
Along with the test equipment the standard has also specified the test levels. The test levels and the frequency bands are selected as per the electromagnetic radiation environment to which the EUT can be exposed when finally installed. The tests are normally performed in the frequency ranges 800 MHz to 960 MHz and 1.4 GHz to 6 GHz. The frequencies or frequency bands to be selected for the test are only applicable where mobile radio telephones and other intentional RF emitting devices operate. Following is the classification of test levels specified in the standard:
Test levels related to general purpose, digital radio telephones and other RF emitting devices are given as follows:
|Level||Test Field Strength (V/m)|
x is an open test level and the associated field strength may be any value. This level may be given in the product standard.