SRF2012A-670YA

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Common mode chokes (CMCs) are electrical devices used to suppress the transmission of a signal, particularly interference caused by electromagnetic interference (EMI). They are also referred to as common mode filters or differential mode filters. Common mode chokes are used in both low-frequency and high-frequency applications, and are often found in communications systems, electronic test equipment, broadcast equipment, medical instrumentation, and other areas requiring controlled transmission of signals. The SRF2012A-670YA is one example of a common mode choke.

The SRF2012A-670YA is an axially symmetric, molded common mode choke, designed to serve as a single line filter while providing excellent performance. The device offers high attenuation at the operating band that covers up to 63MHz in a miniature package. It features very low DCR (0.10 - 0.75Ω) and high isolation (up to 284mΩ at 20 kHz). The SRF2012A-670YA is suitable for up to 125VAC/VDC operation, with an operating temperature range of -55°C to +125°C.

The working principle of the SRF2012A-670YA involves the electromagnetic induction of a coil placed around a ferrite core. When a signal is applied to the coil, an electromagnetic field is generated. This field induces electrical currents to flow in the same direction across the ferrite core, and these currents are prevented from reaching the other side of the coil. This prevents the signal from passing through the core, which results in a high degree of signal suppression.

Furthermore, the SRF2012A-670YA contains two independent windings, which allow the device to be used to reduce both common mode and differential mode noise. The device contains two independent windings, with each winding having a different inductance value and a different number of turns. The difference in inductance values allows the device to generate two discrete levels of voltage when a signal is applied, resulting in improved signal suppression. The differential mode winding is used to reduce noise caused by the signal passing through one winding while the other winding is at a different voltage than the signal.

The SRF2012A-670YA is designed for a wide range of applications, including automotive, industrial, consumer, and medical electronics. It is used to reduce EMI in systems that operate with both AC and DC signals. In automotive applications, the device is used to reduce the signal interference that may be induced from wires running alongside one another and carried in a vehicle. In industrial applications, the device is used to reduce the EMI from motors, engines, and other machinery. It is also used to reduce the noise created by large amounts of power running simultaneously on a single line. In consumer applications, the device is used to reduce the noise that is often generated by household appliances such as washing machines, vacuum cleaners, and air conditioners. The SRF2012A-670YA is also widely used in medical systems, where it is used to reduce the noise caused by the operation of medical instruments and devices.

In conclusion, the SRF2012A-670YA is a miniature molded common mode choke, designed to reduce EMI in a wide range of applications. The device features two independent windings, high attenuation, and low DCR. It is used in automotive, industrial, consumer, and medical applications to reduce the signal interference caused by EMI. The SRF2012A-670YA is an ideal solution for applications that require high performance in a small package.

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