BLM18DN221SN1D

Chip Ferrite Bead Overview

The Murata BLM18DN221SN1D is a single-line ferrite chip bead in the BLM18DN series, designed for surface-mount applications. It features a 0603 (1608 metric) package with dimensions of 1.6 mm length, 0.8 mm width, and 0.8 mm height. The component provides an impedance of 220 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.4 A and has a maximum DC resistance of 120 mOhms. The operating temperature range spans from -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise suppression for digital signal lines within compact surface-mount footprints.
• Engineered to handle significant direct current loads without saturation, suitable for power distribution filtering.
• Constructed with robust ferrite materials ensuring stable electrical characteristics across wide industrial temperature extremes.

Chip Ferrite Bead Applications

• Noise suppression on high-speed digital signal lines
• EMI filtering in portable electronic devices
• Power supply line conditioning

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against the manufacturer's latest datasheet to confirm packaging and tape-and-reel specifications. Ensure the procurement channel sources genuine Murata Electronics components to guarantee compliance with RoHS directives and material traceability standards required for production integration.

Chip Ferrite Bead Selection Notes

Select this component when a 0603 footprint is constrained but higher current handling than standard low-current beads is required. Compare the 1.4 A rating against circuit load requirements and verify that the 220 Ohm impedance at 100 MHz aligns with the target noise spectrum. Consider thermal derating if ambient temperatures approach the upper operational limit.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM18DN series, which focuses on high-current capabilities within the standard 0603 form factor. It complements other series like BLM18PG or BLM18KG by offering a balance between impedance performance and DC bias tolerance for general-purpose electronics.

Chip Ferrite Bead Replacement Considerations

Cross-reference with BLM18PG221SN1D for similar impedance but lower current ratings, or BLM18BD221SN1D for lower current applications. Verify pin compatibility and impedance curves before substitution.

Chip Ferrite Bead FAQ

What is the maximum DC current rating for the BLM18DN221SN1D?

The component is rated for a maximum DC current of 1.4 Amperes.

Does this ferrite bead support automotive-grade reliability?

Public documentation does not explicitly certify this specific part number for automotive standards; verification against the official datasheet is required.