Coilcraft wirewound ferrite beads provide superior broadband performance compared to both low- and high-DCR chip ferrite beads.
Figure 1 compares the Coilcraft 0402DF-121 wirewound ferrite bead to the lowest-DCR 0402-sized chip ferrite bead. The 0402DF offers higher impedance across the frequency range, providing a greater measure of filtering from 100 MHz and above.
Figure 2 compares the same Coilcraft 0402DF-121 wirewound ferrite bead to the typical high-DCR chip ferrite bead. The 0402DF maintains the same high frequency attenuation while providing higher current ratings and 40 percent better DCR.
- Better attenuation across frequencies
- Best performance in the smallest size
- Lower DC resistance (DCR)
- Higher current ratings without core saturation