The NFA81R10C222T1 is a Murata Electronics North America NFA series common mode choke. Common mode chokes are electronic components used to suppress common-mode noise in electronic circuits, especially in high-speed data lines and power lines.

Applications

• USB lines
• HDMI lines
• LVDS lines
• Power lines
• Audio lines

Key Features

• Effective common-mode noise suppression
• Compact size (typically surface mount)
• Low differential mode distortion
• High impedance at the target noise frequency
• Low DC resistance

Benefits

• Reduces EMI (Electromagnetic Interference)
• Improves signal integrity
• Enhances system reliability
• Complies with EMC (Electromagnetic Compatibility) regulations
• Minimizes signal degradation

Additional Details

The NFA81R10C222T1 common mode choke is designed to attenuate common-mode noise while having minimal impact on the differential signals. The impedance of the choke is high at the frequencies where common-mode noise is most problematic. The DC resistance is kept low to minimize voltage drop and power loss. Common mode chokes are constructed with two identical inductors wound on a single core. This configuration ensures that differential signals pass through with minimal impedance, while common-mode signals experience a high impedance, effectively suppressing them. The NFA81R10C222T1 features a compact surface-mount package for easy installation. Proper PCB layout is critical for effective common-mode noise suppression. The choke should be placed as close as possible to the noise source or the point where the noise enters the circuit. Shielding can further reduce EMI. The NFA81R10C222T1 choke meets RoHS compliance requirements.

Common-mode chokes are essential components in modern electronic devices to ensure electromagnetic compatibility and to reduce noise-related problems. Selecting the correct choke for a specific application involves considering the frequency range of the noise, the impedance requirements, and the current carrying capacity. Murata provides extensive technical documentation and support for their common-mode chokes, including S-parameters and simulation models. Proper use of common-mode chokes can significantly improve the performance and reliability of electronic systems.