RN112-0.4-02

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Common mode chokes, also known as differential mode chokes, are an integral part of many electrical systems. They are designed to block common mode electrical noise, while allowing the differential mode signal to pass through unaffected. The RN112-0.4-02 is an example of a common mode choke, which is commonly used in commercial and industrial applications.

The RN112-0.4-02 common mode choke is designed to suppress electrical interference caused by ground loops, power line disturbances, and other EMI sources. It is a single channel, two-wire passive device with an operating temperature range of –40°C to +125°C. The typical impedance of the device is 400 Ω at a frequency of 1 kHz. It features a loss of approximately 0.06 dB at the rated impedance, making it well-suited for suppressing noises generated by power lines and motor loads.

The core of the RN112-0.4-02 is made of soft ferrite material, which facilitates high impedance in a small form factor. It also offers excellent thermal and mechanical stability, making it a reliable choice for many industrial and commercial applications. The device has a lead-free finish, making it compatible with the European RoHS directive. It is also RoHS-2 compliant, making it even more attractive to many engineers.

The RN112-0.4-02 is typically used in applications with power line noise, power amplifier circuits, motor control applications, and other configurations where common mode noise needs to be suppressed. Its ability to reduce EMI radiation helps to protect sensitive equipment from potential damage. It is also commonly used in automotive, aerospace, telecommunications, and medical systems.

The working principle of the RN112-0.4-02 is based on the fact that it blocks common mode currents but passes differential mode currents. The differential mode current is the desired signal, while the common mode current is the undesired noise that the device eliminates. This is achieved by using two identical but opposite sets of windings, which together form an inductor-like structure. The windings are configured in a loop configuration, with one winding in-phase and one out-of-phase. This creates a magnetic field, which opposes and suppresses the common mode interference, while allowing the differential mode signal to pass through unchanged.

In conclusion, the RN112-0.4-02 is a common mode choke designed to suppress electrical interference caused by ground loops, power line disturbances, and other EMI sources. Its lead-free finish and wide operating temperature range make it ideal for many industrial and commercial applications. The device is built with soft ferrite material and features a low-loss impedance of 400 Ω at 1 kHz, making it well suited for suppressing power line and motor noises. Its ability to block common mode noise while allowing the differential mode signal to pass through unchanged, makes it a reliable choice for many industrial and commercial applications.

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