Noise attenuation at 100 MHz
The BLM15GG471SN1D: The 470 Ohm impedance at 100 MHz targets conducted EMI in the 30–300 MHz band — common for switching regulator harmonics and digital clock noise on power rails.
0402 (1005 metric) footprint — 1.00 mm x 0.55 mm body, 0.55 mm seated height. Surface-mount assembly with standard reflow profile.
Murata lists the BLM15GG471SN1D as Active. The part belongs to the EMIFIL BLM15 series, a broad 0402 ferrite-bead family; pin-compatible alternatives within the same series (different impedance values) exist if the noise profile changes during design.