DLW21HN181SQ2L

Common Mode Chokes Overview

The DLW21HN181SQ2L is a wirewound common mode choke from the Murata EMIFIL DLW21H series, designed for surface mount applications in the 0805 (2012 metric) package. It provides an impedance of 180 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. The component supports a maximum DC current of 250 mA and features a maximum DC resistance of 500 mOhms. It operates within a temperature range of -40°C to +85°C and has physical dimensions of 2 mm length, 1.2 mm width, and 0.9 mm height.

Common Mode Chokes Feature Summary

• Wirewound construction for effective noise suppression
• Compact 0805 surface mount footprint
• Unshielded design suitable for general EMI filtering

Common Mode Chokes Applications

• General purpose electromagnetic interference filtering
• Signal line noise suppression in compact electronics
• Power supply input/output filtering

Common Mode Chokes Procurement Notes

Verify the specific suffix SQ2L against the manufacturer's latest datasheet to confirm terminal plating and reel specifications. Ensure the selected variant matches the required impedance tolerance and current rating for the target circuit. Cross-reference the part number with official Murata documentation to avoid confusion with similar DLW21 series components that may have different electrical characteristics or packaging options.

Common Mode Chokes Selection Notes

Select this component when a low-profile 0805 common mode choke is required for moderate current applications up to 250 mA. The 180 Ohm impedance at 100 MHz makes it suitable for suppressing high-frequency noise on data lines or power rails where space is constrained. Consider the unshielded nature of the device when placing components near sensitive analog circuits to minimize potential coupling effects.

Common Mode Chokes Part Context

This part belongs to the DLW21H series, which offers various impedance values in the standard 0805 case size. It is distinct from the DLW21S series, which typically supports higher current ratings, and the DLW21Z series, which is qualified for automotive applications. The DLW21HN181SQ2L serves as a standard industrial grade solution for general consumer and commercial electronic devices requiring basic EMI protection.

Common Mode Chokes Replacement Considerations

Direct substitutes include other DLW21HN181 variants with compatible suffixes if packaging differs. For higher current requirements, consider the DLW21SN181SQ2L. For lower impedance needs, explore DLW21HN670SQ2L or DLW21HN900SQ2L within the same series.