22-ohm suppression at 100 MHz
The BLM15BA220SN1D is a single-line ferrite bead from Murata's EMIFIL BLM15 series, offering 22 Ohms impedance at 100 MHz to attenuate conducted noise on signal lines. The 300 mA current rating sets the maximum DC load the bead can carry without saturating the ferrite core, while the 300 mOhm DCR introduces a voltage drop of 90 mV at full rated current — a factor to budget in low-voltage supply rails.
Temperature range and package fit
The 0402 (1005 Metric) footprint is a standard SMD size widely used in compact PCB layouts, and the single-line configuration filters one signal or supply trace per device.