MS75084-12ST

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Fixed inductors, also known as chokes, coils, or reactors, are components that primarily exhibit a linear relationship between the current and voltage with some inductance value and impedance. Most common types of these components are composed of a wound copper wire encapsulated in a cylindrical or rectangular form and are ideal for DC/DC converters, power supplies, and other switching applications. The MS75084-12ST specifically is a 12A rated high current common-mode choke, suitable as a noise filter and current limiter in various power electronic applications such as AC/DC, DC/DC, AC/AC, or motor drives.

The MS75084-12ST is constructed in a cylindrical shape with a size of 14.00mm x 32.00mm and a lead spacing of 8.50mm. It features two separate coils with 500 turns for each one, out of which one is targeted to reduce the common-mode noise and the other one functions as a differential mode inductor. The extended temperature range of -40°C to +125°C and an operating current up to 12A makes this component suitable for high-end applications such as automotive, consumer electronics, and industrial automation.

The main difference between the MS75084-12ST and other common-mode chokes is its ability to provide equal impedance for both the differential mode and the common mode, despite having different structures for each of the operation modes. This allows the part to provide greater suppression over a wide range of frequencies and make the part suitable for extremely noisy environments. To improve this application further, an intuitive ferrite core is implemented to reduce stray magnetic fields, and a double terminate construction helps to reduce DC resistance and improve heat dissipation.

Since the MS75084-12ST is a high-current common-mode choke, it can be used in situations requiring high current operation and a high level of noise suppression. It is ideal for applications such as motor drives, AC/DC and DC/DC converters, and various other power electronics applications. In addition, it can be used as a current-limiter in applications like switching power supplies, lighting systems, or battery charging. The part’s double terminate construction and extended temperature range also make it suitable for high-end automotive applications and industrial automation projects that operate at extreme temperatures.

The working principle of the MS75084-12ST is fairly simple. Current flows through the choke, typically in a differential mode, and the inductance of the wire windings generate a voltage drop. As the current running through the choke increases, the voltage drop becomes larger and this induces an opposite current in the other winding. This helps to reduce the noise in the system and limits the current through the device. In addition, the double terminate construction of the part helps to further reduce the DC resistance and improve the heat dissipation for better performance. The ferrite core material also helps to reduce stray magnetic fields and reduce interference caused by external sources. This combination of features allows the MS75084-12ST to provide excellent performance and operating parameters for high-end automotive, industrial, and consumer electronics applications.

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