DLW21SN371SQ2L

Common Mode Chokes Overview

The DLW21SN371SQ2L is a wirewound common mode choke from the Murata EMIFIL DLW21S series, designed for surface mount applications in the 0805 (2012 metric) package. It features a nominal impedance of 370 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 280 mA and has a maximum DC resistance of 450 mOhms. Rated for 50 VDC, it operates within a temperature range of -40°C to +85°C. The unshielded design measures 2 mm x 1.2 mm x 1.2 mm.

Common Mode Chokes Feature Summary

• High coupling coefficient enables effective noise suppression on differential signal lines without causing distortion during high-speed data transmission.
• Wirewound construction provides high common mode impedance for superior noise attenuation performance at high frequencies.

Common Mode Chokes Applications

• Noise suppression for USB lines in personal computers and peripheral devices
• Filtering for LVDS lines in notebook PCs
• Common mode filtering for LCD interfaces
• Noise control in small digital AV equipment such as digital cameras

Common Mode Chokes Procurement Notes

Verify the specific impedance value of 370 Ohms and the 280 mA current rating against the official datasheet before integration. Confirm the 0805 package dimensions and RoHS compliance status. Ensure the operating environment remains within the specified -40°C to +85°C range to maintain performance integrity.

Common Mode Chokes Selection Notes

Select this component for compact designs requiring effective EMI suppression on high-speed differential pairs like USB or LVDS. The 0805 footprint suits space-constrained PCB layouts. Consider the 280 mA current limit and 450 mOhm DCR when evaluating power handling and signal loss requirements for the target application circuit.

Common Mode Chokes Part Context

This part belongs to the DLW21S series of wirewound common mode chokes manufactured by Murata Electronics under the EMIFIL brand. The series is characterized by its small 0805 form factor and high coupling efficiency, making it suitable for modern portable electronics and digital AV devices where size and noise performance are critical constraints.

Common Mode Chokes Replacement Considerations

Other parts in the DLW21S series with different impedance values, such as DLW21SN900SQ2L or DLW21SN261SQ2L, may serve as alternatives if the impedance requirement differs. Verify that substitute components match the 0805 package dimensions and current ratings.