ALFT-04-5

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Common Mode Chokes are electrical components used to provide electromagnetic interference (EMI) reduction within signal and power lines. The ALFT-04-5 series of common mode chokes from Alpha Laboratories is an advanced choke designed for use in a wide range of industries, such as mobile phone base stations, communications systems and industrial automation. The device is composed of two separate windings – a common mode and differential mode – and is specially designed to provide superior common mode unbalancing from the ground and differential mode attenuation. Working in combination with the two windings, the ALFT-04-5 achieves excellent common mode and differential mode performance.

In terms of operation, the ALFT-04-5 is designed to suppress emissions, prevent radiated signals from external noise sources and reduce interference on a wider range of frequencies. Operation is based on Faraday’s law of induction; when a current passes through the windings, it creates a joint magnetic field in the core of the device, causing a voltage to be induced in both the common mode and differential mode windings. This induced voltage is then superimposed on the signal lines to reduce the unwanted noises. The common mode choke also attenuates differential mode signals with the help of its transformer-like construction.

Outside of its core design features, the ALFT-04-5 also carries a unique set of device specifications to ensure it carries out its operation effectively. The choke has a high frequency insertion loss of 0.3dB, with a ripple of 0.2dB and a frequency range of 1MHz to 500MHz. The device also has an operating temperature range of -40°C to +105°C, along with an insulation voltage rating of up to 1.5kVrms, achieved through the inclusion of highly efficient insulation materials. With a noise reduction rating of -75dB, the device is designed to provide advanced EMI suppression, working to ensure the integrity of signal and power line integrity.

Due to its targeted signal suppression and advanced performance, the ALFT-04-5 is ideal for use within a wide range of applications. Common uses include mobile phone base stations and radio systems, sub-systems for EMC testing, industrial automation systems and motors, television receivers, white goods and automotive electronics, and power supplies for medical equipment. Thanks to its low-profile design, the device is also suitable for applications with space constraints.

In short, the ALFT-04-5 series of common mode chokes offer an effective and reliable method of reducing unwanted EMI signals and providing superior common mode and differential mode attenuation. With its advanced performance and wide application field, the device is well-suited for use in a variety of industries and specialist applications.

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