ECMF04-4HSWM10 Filters

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Common Mode Chokes (CMCs) are signal filters that are used to eliminate unwanted high frequency emissions. They are primarily used to filter out incoming high frequency signals, reducing the amount of disruptive electromagnetic interference (EMI). ECMF04-4HSWM10 is a common mode choke. As its name suggests, its purpose is to reduce EMI in a wide range of applications. This section will provide an overview of the applications and working principle of this device.

Applications

ECMF04-4HSWM10 is a high performance common mode choke, ideal for switching power supplies, telecom, and instrumentation applications. Its wide range of applications include data lines, audio equipment, high speed bus interfaces, AC/DC power supplies, and automotive. It can also be used in different types of circuit board layouts to provide high levels of noise suppression and effective integration. Additionally, its small size makes it suitable for use in space-constrained applications.

Working Principle

ECMF04-4HSWM10 is designed to provide superior noise reduction, and it works on the principle of asymmetrical differentialmode inductance with complete common mode current cancellation. The device consists of two identical windings, one each for the differential and common mode signals. Differential mode signals flow through the differential mode winding while cancellation of common mode signals is achieved by summing the current through the two windings to zero. Since the current through each winding is opposite, the two windings act as a kind of transformer, and the device monitors the net magnetic flux that is produced by the differential mode winding. This flux helps suppress high frequency emissions, resulting in better noise reduction.

The device also features a high DC resistance due to its construction, helping reduce the electrical stress on the circuit. Additionally, ECMF04-4HSWM10 has a low total harmonic distortion (THD) rating, which helps prevent power line noise from entering the system. This feature makes the device suitable for applications with long cables.

In summary, ECMF04-4HSWM10 is a high performance common mode choke that is capable of providing superior noise reduction. It is an ideal solution for a wide range of telecom, instrumentation, and power supply applications. Its asymmetrical differential mode inductance with complete common mode current cancellation, high DC resistance, and low THD rating make it a reliable and effective noise filter.

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