BLM21AG471SN1D

Chip Ferrite Bead Overview

The BLM21AG471SN1D is a single-line ferrite bead from Murata's EMIFIL BLM21 series, designed for surface-mount assembly in the 0805 (2012 metric) package. It provides an impedance of 470 Ohms at 100 MHz with a maximum DC resistance of 190 milliohms and a rated current of 700mA. The component operates within a temperature range of -55°C to 125°C, measuring 2.00mm in length, 1.25mm in width, and up to 1.05mm in height.

Chip Ferrite Bead Feature Summary

• Provides high-impedance noise suppression for signal lines at 100 MHz
• Supports continuous currents up to 700mA with low DC resistance
• Compatible with standard surface-mount reflow soldering processes

Chip Ferrite Bead Applications

• EMI suppression for general electronic circuits
• Noise filtering on audio lines
• Signal integrity protection in portable devices

Chip Ferrite Bead Procurement Notes

Verify the specific suffix SN1D against official Murata documentation to confirm packaging type and tape dimensions. Ensure the selected variant matches the required impedance tolerance and current rating for the target application circuit design.

Chip Ferrite Bead Selection Notes

Select this component when a 0805 footprint is required with a 700mA current capacity. Compare the 190mOhm DCR against system power loss constraints. Verify that the 470 Ohm impedance at 100 MHz aligns with the targeted noise frequency spectrum.

Chip Ferrite Bead Part Context

This part belongs to the BLM21BD/RK/AG family of ferrite beads. While sharing the 0805 form factor, variants differ significantly in rated current and DC resistance. The AG suffix specifically denotes the 700mA rating and 190mOhm resistance profile distinct from other series members.

Chip Ferrite Bead Replacement Considerations

Public confirmed substitutes include BLM21BD471SN1D and BLM21RK471SN1D. These alternatives share the same impedance but offer different current ratings and DC resistance values, requiring circuit verification before substitution.