220 Ohm suppression at 100 MHz in a 0402 body
The BLM15GG221SZ1D is a single-line ferrite bead from Murata's BLM series, delivering 220 Ohms impedance at 100 MHz in the compact 0402 (1005 Metric) footprint. This impedance peak targets conducted EMI in the 30-300 MHz range — the sweet spot where clock harmonics and switching edges radiate from signal traces. Rated for 300 mA continuous current with a maximum DC resistance of 700 mOhm, the bead's self-heating stays within tolerance for most signal and low-power supply lines.
Surface-mount footprint and tape-and-reel delivery
The 0402 package measures 1.00 mm x 0.50 mm with a maximum seated height of 0.55 mm. It mounts on standard FR-4 with no special pad geometry beyond the IPC-7351 footprint for 0402 chip components. Available in Tape & Reel (TR) or Cut Tape (CT) packaging, the bead suits both high-volume pick-and-place and prototype builds. The BLM15GG base product number covers the full impedance family in this package size.