220 Ω at 100 MHz — the suppression band for this ferrite bead
The Murata BLM15EG221SN1D is a single-line ferrite bead from the EMIFIL® BLM15 series, offering 220 Ω impedance at 100 MHz — the frequency where most conducted EMI from switching regulators and digital clocks peaks. The 0402 footprint (1.00 mm × 0.55 mm) and 0.55 mm seated height fit tight layouts near the IC supply pin — place it as close to the load as possible so the trace between bead and pin does not re-radiate the noise you just filtered.
NRND — plan the BOM migration now
Existing production can continue through independent distribution, but new board spins should evaluate the current-generation EMIFIL® part with the same 0402 footprint and 220 Ω @ 100 MHz target.
Temperature range and board fit
The 0402 package reflows with standard lead-free profiles; the ferrite body does not crack under thermal shock if the pad geometry follows the manufacturer's land pattern.