BLM18DN381SH1D

Chip Ferrite Bead Overview

The Murata BLM18DN381SH1D is a single-channel ferrite chip bead in the EMIFIL BLM18 series, housed in a 0603 (1608 metric) surface-mount package. It provides an impedance of 380 Ohms at 100 MHz with a 25% tolerance. The component supports a maximum DC current of 850 mA and has a maximum DC resistance of 325 mOhms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive qualification standards.

Chip Ferrite Bead Feature Summary

• Provides high-frequency noise suppression through significant impedance characteristics at 100 MHz.
• Designed for compact surface-mount integration within standard 0603 footprints.
• Qualified for automotive applications under the AEC-Q200 reliability standard.

Chip Ferrite Bead Applications

• Automotive electronic circuit noise filtering
• High-speed digital signal line suppression
• Power supply input/output decoupling

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SH1D to confirm the 0603 package and tape-and-reel packaging configuration. Ensure the design accommodates the 850 mA current rating to prevent saturation. Confirm AEC-Q200 compliance requirements match the target application environment before finalizing procurement specifications.

Chip Ferrite Bead Selection Notes

Select this component when a 380 Ohm impedance value is required for EMI suppression in space-constrained designs. The 0603 form factor allows for dense PCB layouts. Consider the 850 mA current limit for power integrity analysis. The AEC-Q200 certification makes it suitable for rigorous automotive environments compared to commercial-grade alternatives.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM18 family of ferrite beads. The series offers various impedance values within the 0603 package size. The DN designation typically indicates specific material properties optimized for broadband noise absorption. This model represents a standardized solution for common-mode and differential-mode interference reduction.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include other BLM18DN381 variants with different packaging suffixes such as BLM18DN381SN1D. Cross-reference impedance curves from competing manufacturers like TDK or Yageo if equivalent performance is needed without changing the footprint.

Chip Ferrite Bead FAQ

What is the test frequency for the specified 380 Ohm impedance?

The impedance of 380 Ohms is measured at a frequency of 100 MHz.

Does this component meet automotive reliability standards?

Yes, the BLM18DN381SH1D is qualified according to the AEC-Q200 standard for passive components.