B82796S513N201

Common Mode Chokes are widely used in a number of applications within the electronics industry. The B82796S513N201 in particular is a common mode choke and this article will summarise the applications field and working principles associated with this component.

Applications

Common Mode Chokes are typically used in circuits to filter out noise from cables that feed power and signals to electronic components. They are especially useful in the automotive industry, where signals or wires may be subject to considerable levels of electrical noise interference.
Another major use for Common Mode Chokes is in the filtering of noise on AC and DC lines. The choke typically is located near a power connector in order to limit the amount of interference entering or leaving the line. As such, they can be extremely effective in reducing the amount of line noise entering signal lines and damaging electronic components, such as digital radios, televisions or other audio equipment.

The B82796S513N201 Common Mode Choke is a multi-layered interference suppression device which is particularly effective in combatting electromagnetic interference. Featuring two miniature axial ferrite core units, the choke is able to reduce the peak current and ripples induced by common mode noise down to a very low level.

Working Principles

Common Mode Chokes work by suppressing common-mode current. In general, electrical noise and interference results in two distinct modes of electromagnetic interference: differential mode and common mode. Differential mode noise is characterised by the signal travelling in both directions on a single line. Common mode noise, on the other hand, is a more intense form of interference, with the signal travelling in synchronized directions on two lines. The B82796S513N201 common mode choke is effective in dampening both differential and common mode noise. The device works by limiting the amount of current that can flow through both lines at any given time.

Once the choke has been placed in the circuit, it will serve as a type of filter that reduces the level of noise and interference travelling along the lines. However, the choke also serves an important function in terms of the return paths of noise. By allowing the loose electromagnetic fields to escape, the direction of the current is changed, causing the return currents to flow into the ground instead of through the circuit. As a result, this reduces the level of noise that would otherwise be present in the circuit.

Conclusion

This article has provided an overview of the applications and working principles of the B82796S513N201 common mode choke. As outlined above, these chokes are typically used in the automotive and audio markets in order to filter out noise on signal and power lines, as well as to reduce the levels of electromagnetic interference. Their working principle centres around the limitation of current and the provision of return paths for the electromagnetic fields. All in all, the B82796S513N201 common mode choke is an invaluable tool in the fight against noise and interference entering circuits.