DLW21SH121HQ2L

Common Mode Chokes Overview

The DLW21SH121HQ2L is a single-channel common mode filter choke from the Murata EMIFIL DLW21H series. It features a 120 Ohm impedance with a 25% tolerance and supports a maximum DC current of 280 mA. The component has a maximum DC resistance of 320 mOhms and operates within a temperature range of -40°C to +125°C. It utilizes an SMD/SMT mounting style in a 0805 (2012 metric) package measuring 2 mm in length. The device is AEC-Q200 qualified for automotive reliability.

Common Mode Chokes Feature Summary

• AEC-Q200 qualified for automotive applications
• High-temperature operation up to +125°C
• Compact 0805 surface-mount footprint

Common Mode Chokes Applications

• Automotive electronic circuit noise suppression
• Signal line filtering in vehicle infotainment systems
• Data bus protection in automotive modules

Common Mode Chokes Procurement Notes

Verify the specific suffix HQ2L against official Murata documentation to confirm packaging and tape-and-reel specifications. Ensure the selected variant matches the required impedance and current ratings for the target application. Cross-reference the AEC-Q200 qualification status if automotive compliance is mandatory for the design.

Common Mode Chokes Selection Notes

Select this component when designing for environments requiring operation up to +125°C, as standard variants may be limited to lower temperatures. The 280 mA current rating suits low-power signal lines rather than high-current power rails. Confirm that the 0805 package dimensions fit the available PCB real estate and that the 120 Ohm impedance aligns with the noise frequency spectrum of the protected circuit.

Common Mode Chokes Part Context

This part belongs to the DLW21H series of wirewound common mode chokes designed for high-temperature stability. Unlike other DLW21 variants such as the DLW21HN or DLW21SZ series which may have different temperature limits or voltage ratings, the SH series specifically targets automotive reliability standards. It serves as a specialized EMI suppression solution for sensitive data lines in harsh thermal environments.

Common Mode Chokes Replacement Considerations

Check for direct substitutes within the DLW21H series with matching 120 Ohm impedance and 280 mA rating. Verify that any alternative maintains the +125°C operating temperature limit and AEC-Q200 certification. Ensure physical compatibility with the 0805 footprint before substitution.