The DLM31KN281SJ2 is a common mode choke coil manufactured by Murata Electronics North America. This component is designed to suppress common mode noise in differential signal lines, preventing electromagnetic interference (EMI) from affecting sensitive circuits. It is widely used in various electronic devices to improve signal integrity and meet regulatory requirements.

Applications:

• USB Lines
• HDMI Lines
• LVDS Interfaces
• CAN Bus Systems
• Differential Signal Transmission
• Audio Equipment

Features:

• Common Mode Noise Suppression: Effectively attenuates common mode noise while minimally affecting differential signals.
• Compact Size: Small form factor for space-constrained applications.
• High Impedance: Provides high impedance to common mode currents, enhancing noise suppression.
• Low DC Resistance: Minimizes signal attenuation and power loss.
• Operating Temperature: -40°C to +85°C
• Rated Current: Varies depending on the specific model (refer to datasheet)
• Inductance: 280 uH (typical)

Benefits:

• Improved Signal Integrity: Reduces noise and interference in differential signal lines.
• EMI Compliance: Helps meet regulatory requirements for electromagnetic compatibility.
• Space Saving: Compact design allows for use in small devices.
• Minimal Signal Degradation: Low DC resistance ensures minimal impact on signal quality.
• Reliable Performance: Consistent noise suppression over a wide frequency range.

The DLM31KN281SJ2 common mode choke coil from Murata is a critical component for ensuring signal integrity and reducing EMI in electronic devices. Its ability to effectively suppress common mode noise while maintaining low DC resistance makes it an ideal choice for high-speed differential interfaces such as USB, HDMI, and LVDS. The compact size of the choke coil allows for easy integration into space-constrained applications, and its robust construction ensures reliable performance over a wide range of operating conditions. This component is widely used in consumer electronics, automotive systems, and industrial equipment to meet stringent EMI standards and provide reliable signal transmission. The high impedance to common mode currents effectively blocks noise from entering or exiting the system, preventing interference with other devices or the surrounding environment.