B84312F100B3

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Power Line Filter Modules: B84312F100B3 Application Field and Working Principle

Power line filter modules, such as the B84312F100B3, are designed to help reduce noise that can interfere with nearby sensitive electronics. Such devices are particularly common in applications where AC power lines are connected to the same electrical equipment as sensitive electronic circuits, such as in industrial automation and medical equipment. By filtering out the electrical noise that can come into the lines, the integrity and performance of the electrical components can be maintained and improved.

The B84312F100B3 from the TDK Corporation is one example of a power line filter module that provides the necessary noise reduction capabilities. This device is constructed in an SMD unipolar design that is notable for its small size and broad voltage range. The device can provide attenuation of both common and differential mode noise up to 40dB, and provides overvoltage protection with a symbol of up to 10A. The device also has positive temperature coefficient (PTC) fuses and capacitors for overload protection and short circuit protection.

At the heart of the B84312F100B3 is the line filter itself. This filter consists of an inductor in series with each power line that helps to block high-frequency noise. There is also a capacitor connected in parallel with each power line, which captures the low frequency noise and dissipates it as heat. The filter also uses ferrite beads to help reduce the amplitude of EMC external interference. In addition to these components, the device also has a varistor to provide overvoltage protection.

The working principle of the device is quite simple: the filter works by blocking unwanted electromagnetic energy from the power lines. The inductor and capacitors that make up the filter act as a kind of "barrier" to keep the noise out. This is done by absorbing the energy from the noise and dissipating it as heat, which is why the device is also equipped with PTC fuses and capacitors for protection. The varistor also helps by forming a temporary disconnect between the source and destination of the noise, allowing the power lines to remain clean and free of noise.

The B84312F100B3 is a great solution for noise reduction in applications where AC power lines are present and sensitive equipment needs protection. It offers great protection against common-mode and differential-mode noise, as well as excellent protection for overvoltage conditions. Its small size and wide voltage range make it an ideal choice for industrial automation and medical applications. The filter itself is easy to use and understand, and its components are all designed to work together to provide the best possible noise reduction for your application.

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