HM28-24006LF

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Common mode chokes are essential components in many electronic devices. These devices are used to filter out common-mode noise in transmission lines carrying power or other signal-related information. The HM28-24006LF is a typical common mode choke. Its applications and working principle are discussed in this article.

The HM28-24006LF is a ceramic-core common mode choke that has a voltage rating of 28V and an inductance range of 0.9-5.1mH. It is designed for applications in harsh environments, such as automotive and industrial environments. Its coil structure is compact and can be easily integrated into printed circuit boards. Further, the choke is also designed to have high resistance to break down voltage and high current-carrying capacity. This makes it suitable for power applications. The choke can also be used for signal applications, such as common-mode interference reduction.

The working principle of the HM28-24006LF is based on the electromagnetic phenomena associated with inductors. The choke is composed of two coils that are wound in opposite directions. These coils are connected in series. The output voltage of the choke is the sum of the voltages of the two coils. As current flows through the coils, electromagnetic forces are set up in each coil. As a result of these forces, an opposite current is induced in each coil. Thus the total current through the both coils is equal to the value of the input current.

In the case of common-mode interference, the current from the source is divided into two components - normal-mode current and common-mode current. The normal-mode current is unchanged whereas the current through the choke is affected by the common-mode current inducing a common-mode voltage across the choke. This voltage is used to filter out the unwanted common-mode currents.

The HM28-24006LF is a versatile component in many applications. It can be used to reduce common-mode interference in signal lines or to provide additional filtering in power applications. The choke is also designed for harsh environments, making it suitable for applications in the automotive and industrial sectors.

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