Murata 1206 BLA31A/B Series Chip Bead Inductor array BLA31A/B series are high performance EMI filters constructed from four circuits of ferrite beads. The BLA31A/B series is suitable for EMI suppression in small digital equipment. Two types of impedance characteristics are available within this series, and these ferrite beads offer a broad frequency range of attenuation. A nickel barrier structure of external electrodes enables excellent solder heat resistance. This series is ideal for high density mounting and reflow or flow soldering can be used. These ferrite beads are suitable for general use.