The PA1320.121NL is a common mode choke from Pulse A Technitrol Company (now Yageo). It's designed to suppress common mode noise in various electronic circuits, especially those involving data transmission or power lines. Common mode chokes are crucial for reducing electromagnetic interference (EMI) and ensuring signal integrity.

Applications:

• Ethernet Ports: Common mode noise suppression in Ethernet communication lines to prevent interference.
• USB Interfaces: Filtering common mode noise in USB data lines to ensure reliable data transmission.
• CAN Bus Systems: Reducing EMI in CAN bus communication lines, commonly used in automotive and industrial applications.
• Power Lines: Filtering noise on power lines to prevent interference with sensitive electronic circuits.
• Audio Circuits: Reducing noise in audio circuits to improve sound quality.

Features:

• High Common Mode Impedance: Provides effective suppression of common mode noise.
• Low Differential Mode Impedance: Minimizes signal attenuation in differential mode.
• Compact Size: Allows for easy integration into space-constrained applications.
• Surface Mount Package: Facilitates automated assembly and reduces manufacturing costs.
• Wide Frequency Range: Operates effectively over a wide range of frequencies.
• RoHS Compliant: Complies with Restriction of Hazardous Substances (RoHS) directive.

Benefits:

• Reduced EMI: Minimizes electromagnetic interference, improving system performance.
• Improved Signal Integrity: Ensures reliable data transmission by filtering out common mode noise.
• Enhanced System Reliability: Protects sensitive electronic components from noise-induced damage.
• Easy Integration: Small size and surface mount package simplify board layout and assembly.
• Cost-Effective Solution: Provides a cost-effective solution for noise suppression.

Additional Details:

The PA1320.121NL typically has a common mode impedance of several hundred ohms at 100 MHz. Its differential mode impedance is typically very low, ensuring minimal signal attenuation. The choke is designed to handle a specified current rating without saturation. It is available in a surface mount package. The PA1320.121NL is often used in applications where compliance with EMI regulations is required. The device helps to prevent conducted emissions from exceeding regulatory limits. It also improves the immunity of electronic circuits to external noise sources. The common mode choke works by creating a high impedance path for common mode currents while allowing differential mode currents to pass through with minimal attenuation.