0402 ferrite bead for signal-line filtering
The BLM15BB220SN1D is a single-line ferrite bead from Murata's EMIFIL BLM15 series, housed in a 0402 (1005 metric) surface-mount package. It presents 22 Ohms of impedance at 100 MHz, targeting conducted noise on signal lines without loading the DC path beyond its 300 mA current rating. The 200 mOhm maximum DC resistance keeps voltage drop low at rated current — about 60 mV at 300 mA — so it suits low-voltage digital or analog supply rails where headroom is tight.
Temperature range and storage note
The 0402 body is small enough that reflow profile and solder paste volume matter more than the part's own thermal limits.