EV20-1.5-02-1M8

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Common Mode Chokes are a type of electromagnetic device used to reduce or eliminate noise/interference from power supplies and circuits. The EV20-1.5-02-1M8 is a relatively common type of common mode choke, designed to assist in the prevention of electromagnetic interference (EMI).

The EV20-1.5-02-1M8 is a white cylindrical ferrite core that measures 1.5 by 2 millimeters, with a total length of 8 millimeters. It is designed to suppress undesirable higher-frequency EMI, with a stop frequency of 1.2 GHz. Because of its small size, this type of common mode choke is used in very small form factor applications. It also provides DC isolation up to 1.5V for a very high dc resistance. This type of common mode choke is designed to suppress common mode electromagnetic interference, as opposed to differential mode interference.

Common mode chokes usually do not reduce EMI on their own, but rather in conjunction with other EMI protection components, such as capacitors, shielding, and other specialized components. The purpose of the common mode choke is to reduce the coupling of the EMI noise from the noise source, such as the switched mode power supply, into the electrical circuit being protected. The operation of the common mode choke is based on the principle of magnetic shielding.

The EV20-1.5-02-1M8 works by offering high impedance to common mode noise, while offering low impedance to the desired differential mode signal that is trying to pass through. The choke is designed in such a way that the higher frequencies of the interference are blocked, while the lower frequencies are allowed to pass through. This helps ensure that the electronic system that is being protected uses only the DC power that is necessary and prevents noise from entering.

The EV20-1.5-02-1M8 is mainly found in very small form factor applications such as RFID readers, Bluetooth or Wifi modules, and computer peripheral devices. It is also used in some consumer electronics, such as television sets, DVD players, and satellite receivers. With its small size and high impedance, it is widely used for selective suppression of differential and common mode disturbances.

The EV20-1.5-02-1M8 provides good EMI protection without the need for bulky and expensive components. It reduces the effects of interference from power supplies and other electronic systems, allowing them to operate smoothly and accurately. It is a low-cost, easy to use solution to reduce or eliminate EMI.

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