The SFI0402-120E050PP-LF is a common mode choke manufactured by Lite-On Inc. designed to suppress common mode noise in various electronic circuits. This choke is particularly useful in applications where electromagnetic interference (EMI) needs to be minimized to ensure proper system operation and compliance with regulatory standards.

Applications

• USB interfaces: Used in USB ports and cables to suppress common mode noise, ensuring reliable data transmission and preventing interference with nearby devices.
• Power supply lines: Implemented in power supply circuits to filter out common mode noise, improving the stability and performance of the power supply.
• Signal lines: Employed in signal lines to reduce EMI, preventing signal degradation and ensuring signal integrity.
• Audio equipment: Used in audio equipment to minimize noise and improve sound quality.
• Networking equipment: Integrated into networking devices like routers and switches to suppress noise and ensure reliable data communication.

Features

• Compact size: The 0402 package size allows for easy integration into small and densely populated circuit boards.
• High common mode impedance: Offers high impedance to common mode currents, effectively suppressing noise.
• Low differential mode impedance: Presents low impedance to differential mode currents, ensuring minimal signal distortion.
• Wide frequency range: Operates effectively over a broad frequency range, making it suitable for various applications.
• Surface mount design: Designed for surface mount assembly, simplifying the manufacturing process.
• Operating Temperature: Typically operates within a temperature range of -40°C to +85°C.

Benefits

• Effective noise suppression: Significantly reduces common mode noise, improving the performance and reliability of electronic circuits.
• Improved signal integrity: Prevents signal degradation caused by EMI, ensuring accurate data transmission.
• Reduced EMI: Minimizes electromagnetic interference, helping products meet regulatory compliance requirements.
• Easy integration: The compact size and surface mount design simplify integration into various electronic devices.
• Enhanced system reliability: Improves the overall reliability of electronic systems by reducing the impact of noise and interference.

Additional Details

The SFI0402-120E050PP-LF common mode choke is constructed with a ferrite core and wound with multiple turns of wire to achieve the desired impedance characteristics. It is designed to suppress common mode currents while allowing differential mode currents to pass through with minimal attenuation. The choke's performance is characterized by its common mode impedance, differential mode impedance, and rated current. Proper selection and placement of the choke are crucial for effective noise suppression. It is important to consider the frequency range of the noise being suppressed and the impedance characteristics of the choke when selecting a suitable component. The SFI0402-120E050PP-LF is RoHS compliant, ensuring it meets environmental standards for electronic components. This part number indicates a common mode impedance of 120 Ohms, a rated current of 50mA, and is Lead-Free (LF).