P0473

Voltage Rating - AC:	--
Package / Case:	Horizontal, 4 PC Pad
Height (Max):	0.220" (5.59mm)
Size / Dimension:	0.500" L x 0.500" W (12.70mm x 12.70mm)
Mounting Type:	Surface Mount
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-40°C ~ 120°C
Series:	--
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	110 mOhm
Current Rating (Max):	1.63A
Number of Lines:	2
Filter Type:	Power Line
Part Status:	Obsolete
Packaging:	Tube

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Common Mode Chokes

Common mode chokes, referred to as P0473, are electrical components designed to restrict the flow of common mode currents while allowing desired transmission signals to pass unimpeded. These chokes are composed of center-tapped coils wound around a magnetic core, which serve to block interference currents while allowing the signal to pass through. When installed in an electrical system, they can improve system performance and reduce susceptibility to interference.

Application Field

The application fields of common mode chokes include industrial control systems, medical equipment, GPS systems, communication systems, automotive electronics, audio-visual equipment, energy management, instrumentation, power conditioning, and many other electrical systems.Common mode chokes are effective at suppressing common mode interference signals in a variety of ways, helping to reduce the effects of electrostatic discharge, radiated emissions, RF interference, and other types of electromagnetic interference. As a result, they can improve system performance, reduce power consumption, and reduce component damages due to interference.

Working Principle

The working principle of a common mode choke is fairly straightforward. At its most basic level, it consists of two center-tapped coils wound around a ferrite or iron-powder core. The center tap allows the choke to act as a transformer, with one coil connected to the signal source and the other coil connected to the load.The choke works by blocking the flow of common mode current while allowing the desired transmission signal to pass unimpeded. This is done by creating an impedance differential between the two coils, where the signal source coil is more resistive than the load coil. This in turn creates a situation where the source coil is activated more than the load coil, thus blocking the signal before it can reach the load.At the same time, the magnetic properties of the core material help to reduce the impact of the common mode interference signals, further improving the performance of the system and reducing susceptibility to interference.

Conclusion

Common mode chokes, also known as P0473, can be used to effectively reduce the amount of interference in a variety of applications. By creating an impedance differential between the source coil and the load coil, common mode chokes can block common mode interference signals while allowing desired transmission signals to pass unimpeded. In addition, the use of magnetic cores can further reduce the effects of interference. By making use of these components, system performance can be improved and susceptibility to interference can be reduced.

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