EMIFIL® BLM15 Chip Ferrite Beads Murata Electronics EMIFIL® (Inductor type) BLM15 Chip Ferrite Beads are part of Murata's noise suppression product line. These beads have simple structures and have been downsized into a smaller, easy-to-use component capable of addressing noise suppression in small portable devices such as mobile phones, mobile audio players, and portable game consoles. Murata BLM15 beads are ideal for high-speed signal lines and power supplies.