BD5.1/2/4-4S2 – FERROXCUBE

The BD5.1/2/4-4S2 from Ferroxcube is a single-line cylindrical ferrite bead designed for EMI suppression in electronic circuits. This component presents a nominal impedance of 40 ohms at 100 MHz, providing attenuation of high-frequency noise. Its physical dimensions are 5.1 mm in outer diameter, 2 mm in inner diameter, and 4 mm in length. Constructed from a proprietary ferrite material, the BD5.1/2/4-4S2 exhibits a frequency-dependent impedance profile, with increasing impedance up to its resonant frequency and decreasing impedance thereafter. It is suitable for through-hole mounting on printed circuit boards and is typically utilized for decoupling power rails, filtering signal lines, and preventing electromagnetic interference from radiating or being conducted. The bead’s performance characteristics are influenced by factors such as DC bias current and operating temperature.