220 Ohm suppression at 100 MHz, 0402 footprint
The BLM15BD221SZ1D is a Murata BLM series ferrite bead in the 0402 (1005 metric) package, delivering 220 Ohms impedance at 100 MHz on a single signal line. Rated for 300 mA continuous current with a maximum DC resistance of 400 mOhm, this bead is sized for low-power signal paths where the DC voltage drop at rated current stays under 120 mV.
AEC-Q200 grade: the automotive qualifier
An OEM auditor will expect PPAP documentation tied to this qualification level; the 125°C upper limit covers under-hood and engine-bay locations where ambient temps reach 105°C with margin.
0402 board-fit and layout note
The signal line passes through the bead; the DC resistance of 400 mOhm is the only series impedance at DC, so the voltage drop across the bead at 300 mA is 120 mV.