B82732W2601B030

Common Mode Chokes, also commonly referred to as EMI filter or simply CM chokes, are essential tools to reduce electromagnetic interference (EMI) in high-frequency circuits. Such interference can emanate from other electronic devices, and can lead to pronounced performance problems. A CM choke is made up of multiple wire coils, which are wound around a core. The shape of the core can vary drastically, including both frustum and ferrite core shapes. The coils are intended to create a low-impedance path for the common mode current - that is, the current that moves in the opposite direction in each of two wires - while blocking the path for the differential current.

The B82732W2601B030 Common Mode Choke is a #26 AWG Ni-Plated Copper Wire EMI filter designed to reduce EMI/RFI emissions in a variety of high-frequency applications. Its features include an insulated bearing tube, compliance with High Temperature/High Humidity requirements, and a wide operating temperature range of -55°F to +200°F (-48°C to +93°C).

The B82732W2601B030 is typically used in environments where both current and voltage levels are high, such as high voltage DC switching power supply applications, industrial automation, base stations, and communications equipment. The common mode choke works by suppressing common mode EMI by acting as an impedance to common mode noise and differential mode noise. It blocks the path of the differential current while providing a pathway for the common mode current, thus reducing EMI in any device to which it is wired.

In the context of AC, the B82732W2601B030 Common Mode Choke exhibits a constant impedance over its operating frequency range (100Hz - 100MHz). This helps to reduce the amount of power loss due to impedance. A higher resistance to the common mode current is also seen at frequencies above 100 MHz, further enhancing the filter’s ability to reduce EMI.

In its most basic configuration, the B82732W2601B030 Common Mode Choke consists of two coils that are wound around an insulated center core. The two coils are wound in different directions, so they create a low-impedance path for the common mode current, while blocking the path for the differential current. The design of the B82732W2601B030 Common Mode Choke has been optimized for suppressing EMI in areas with higher than normal current or voltage levels.