The DLW21HN121SS2L is a common mode choke coil manufactured by Murata Electronics North America. Common mode chokes are passive electronic components designed to suppress common mode noise in electronic circuits. They are crucial for reducing electromagnetic interference (EMI) and ensuring compliance with EMC regulations.

Applications

• USB data lines
• Differential signal lines
• Power lines
• Automotive applications
• Audio and video signal lines

Features

• Compact size (2012 size: 2.0mm x 1.2mm)
• High common mode impedance
• Low differential mode impedance
• Excellent noise suppression characteristics
• RoHS compliant

Benefits

• Reduces EMI emissions
• Improves signal integrity
• Enhances system reliability
• Simplifies EMC compliance
• Space-saving design for compact electronic devices

Additional Details

The DLW21HN121SS2L has an inductance of 120nH and is designed to suppress noise in the frequency range relevant to USB and other high-speed data interfaces. Common mode chokes work by presenting a high impedance to common mode currents while allowing differential mode signals to pass through with minimal attenuation. This ensures that the desired signal is not affected while effectively blocking unwanted noise.

Murata's common mode chokes are known for their high performance and reliability. The DLW21HN121SS2L is suitable for use in a wide range of electronic devices, including smartphones, tablets, computers, and automotive systems. When selecting a common mode choke, it is important to consider the impedance characteristics, current rating, and physical size to ensure that it meets the application's requirements. Proper PCB layout techniques, such as minimizing trace lengths and providing adequate grounding, are essential for maximizing the effectiveness of the choke. It is crucial to consult the product datasheet for detailed specifications and application notes.