BLM18BB471SH1D

Chip Ferrite Bead Overview

The BLM18BB471SH1D is a single-line ferrite bead from Murata's BLM series, designed for noise suppression in high-speed digital circuits. It features a compact 0603 (1608 metric) surface-mount package. The component provides an impedance of 470 ohms at 100 MHz with a maximum DC resistance of 0.5 ohms and a rated current of 2.0 amperes. It utilizes a shielded structure to minimize electromagnetic interference coupling between adjacent traces.

Chip Ferrite Bead Feature Summary

• Shielded design reduces magnetic field leakage and crosstalk
• Compact 0603 footprint suitable for dense PCB layouts
• High current handling capability for power line applications

Chip Ferrite Bead Applications

• Noise suppression on USB data lines
• EMI filtering in mobile phone power supplies
• Signal integrity improvement in high-speed interface circuits

Chip Ferrite Bead Procurement Notes

Verify the complete part number including the suffix SH1D to ensure correct impedance and termination specifications. Confirm that the required current rating meets the circuit's operational demands. Check datasheet for temperature characteristics and impedance tolerance ranges before finalizing procurement.

Chip Ferrite Bead Selection Notes

Select this component when space constraints require a 0603 package but higher current capacity than standard beads allows. Ensure the target frequency range aligns with the 470-ohm impedance peak. Verify that the shielded construction is necessary to prevent near-field coupling in crowded board areas.

Chip Ferrite Bead Part Context

This part belongs to Murata's BLM18BB series of shielded ferrite beads. The series offers various impedance values within the same 0603 footprint. It is distinct from unshielded variants by its integrated magnetic shielding layer, which enhances performance in multi-layer boards with closely spaced signals.

Chip Ferrite Bead Replacement Considerations

• BLM18BB471SN1D
• BLM18PG471SN1D

Chip Ferrite Bead FAQ

What is the difference between BLM18BB471SH1D and BLM18PG471SN1D?

The BB series features a shielded structure to reduce magnetic field emission, whereas the PG series is unshielded. Both share similar electrical parameters but differ in physical construction and EMI suppression characteristics.

Does the impedance value change with frequency?

Yes, the impedance is specified as 470 ohms at 100 MHz. The actual impedance varies across the frequency spectrum, typically peaking near the specified test frequency and decreasing at lower or significantly higher frequencies.