BLM18BD421SN1D

Chip Ferrite Bead Overview

The Murata BLM18BD421SN1D is a single-line ferrite chip bead in the EMIFIL BLM18BD 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 420 Ohms at a test frequency of 100 MHz with a tolerance of ±25%. It supports a maximum DC current of 200 mA and has a maximum DC resistance of 550 mOhms. The device operates within a temperature range of -55°C to +125°C.

Chip Ferrite Bead Feature Summary

• Provides high impedance attenuation for noise suppression on single signal lines
• Designed for compact surface-mount integration in space-constrained layouts
• Constructed for stable performance across wide industrial temperature ranges

Chip Ferrite Bead Applications

• Noise filtering for high-speed digital signal lines
• EMI suppression in portable electronic devices
• Signal integrity management in consumer electronics

Chip Ferrite Bead Procurement Notes

Verify the specific suffix 'SN1D' against official Murata documentation to confirm packaging and tape specifications. Ensure the selected variant matches the required 0603 footprint and electrical ratings for your circuit design. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Chip Ferrite Bead Selection Notes

Select this component when a 420 Ohm impedance at 100 MHz is required for noise control on single-ended signals. The 200 mA current rating suits low-power signal paths rather than power delivery lines. Consider the 0603 package size for board space optimization. Verify that the 550 mOhm DC resistance does not introduce excessive voltage drop in the target application circuit.

Chip Ferrite Bead Part Context

This part belongs to the Murata EMIFIL BLM18BD series, which focuses on high-impedance ferrite beads for EMI suppression. The series utilizes specialized materials to maintain effective noise attenuation characteristics at higher frequencies. These components are engineered to support signal integrity in modern electronic systems where electromagnetic interference must be strictly controlled.

Chip Ferrite Bead Replacement Considerations

Consult official Murata substitution guides for verified alternatives. Ensure any replacement maintains the 0603 footprint, 420 Ohm impedance, and 200 mA current handling capabilities.