7118-RC

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7118-RC Application Field and Working Principle

Common Mode Chokes, also known as EMI filters, are widely used in electronic designs, such as TV, radio, audio systems, computers and other electric current machines, to reduce conducted emission and improve the immunity of sensitive electronics. 7118-RC common mode chokes are widely used in industrial power supplies, appliances and various computer peripherals.7118-RC common mode chokes are made of two monolithic double-hole core with multiphase windings. The monolithic double-hole core of 7118-RC common mode chokes is made of ferrite material. The multiphase winding on this core is made of high-temperature enameled winding wire. The winding property of 7118-RC common mode chokes provides a maximum of 1 Ampere DC current. The common mode impedance capability of 7118-RC common mode chokes is up to 10MHz.The principle of operation of a common mode choke is based on the property of inductance, which differs for different circuits. When large currents are applied to a coil, the inductance will increase and the choke will increase its impedance, thus reducing the current in the circuit. This impedance is called "common mode impedance". As a result, common mode chokes can be used to reduce conducted electromagnetic interference and improve the system\'s immunity to external interference.The 7118-RC common mode chokes are mainly used in power supply and signal lines, and can effectively reduce the electromagnetic interference caused by various currents in the power supply line, and can reduce the mutual interference between various signal lines. The 7118-RC common mode chokes is suitable for devices with AC and series DC circuits working in a wide range of temperatures.The 7118-RC common mode chokes have multiple installation methods. First, the common mode chokes can be installed on the circuit board by soldering. Second, it can be integrated with the filters by means of lead wires directly passing through the center hole of the choke. Finally, the 7118-RC common mode chokes can also be installed with lead wires connected to both ends of the choke winding.7118-RC common mode chokes can be used as signal line suppressor for devices and protect LED display from disturbance. Moreover, 7118-RC common mode chokes can be used as the input filter for power supply and as the output filter for switching power supply.In conclusion, the 7118-RC common mode chokes are highly effective in reducing the disturbance of AC and series DC circuits, and effectively reduce the EMI in the system.

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