Search Coilcraft 0 Products EMI Wirewound-Ferrite-Beads Wirewound Ferrite Beads Provide superior broadband performance as EMI chokes vs traditional chip ferrite beads. Learn more about wirewound ferrite beads in our Getting Started Series 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 0201 (0603) Product series Inductance Features Length (mm) Width (mm) Height (mm) 0201AF 33 nH — 200 nH Optimized for RF isolation from 900 MHz to 9 GHz High values in 0201 size – up to 200 nH 0.58 0.36 0.46 View Series 026011F 27 nH — 560 nH Performance-enhanced 0201 size – 0.76 × 0.33 × 0.55 mm Highest values in 0201 – up to 560 nH 0.76 0.33 0.55 View Series 0402 (1005) Product series Inductance Features Length (mm) Width (mm) Height (mm) 0402FL 20 nH — 560 nH Ideal as a one-pole filter or RF choke Effective on-board or as modular element 1.11 0.72 0.55 View Series 0402DF 20 nH — 3.3 µH Lowest DCR - Ideal for cellular / mobile Highest L values – up to 3300 nH 1.11 0.66 0.66 View Series 0402AF 20 nH — 560 nH Original 0402 ferrite chip inductors High inductance values 1.12 0.66 0.66 View Series 0603 (1608) Product series Inductance Features Length (mm) Width (mm) Height (mm) 0603AF 15 nH — 10 µH Heavy gauge wire for higher current ±5% inductance tolerance for all values 1.8 1.12 0.91 View Series 0603LS 47 nH — 22 µH High current, low DCR in an 0603 footprint Tight tolerances: ±5% and ±2% 1.8 1.12 1.12 View Series 0805 (2012) Product series Inductance Features Length (mm) Width (mm) Height (mm) 0805AF 110 nH — 22 µH Heavy gauge wire for low DCR ±5% inductance tolerance for all values 2.29 1.73 1.52 View Series 0805RB 190 nH — 2.9 µH Optimized high impedance over a wide frequency range Higher SRF than other 0805 series 2.29 1.73 1.52 View Series 0805LS 78 nH — 27 µH High current, low DCR in an 0805 footprint Tight tolerances: ±5% and ±2% 2.29 1.91 1.6 View Series 1008 (2520) Product series Inductance Features Length (mm) Width (mm) Height (mm) 1008AF 900 nH — 10 µH High current handling and low DCR in 1008 (2520) size ±5% L tolerance standard for all values 2.92 2.79 1.91 View Series 1008LS 1.0 µH — 100 µH Higher Q and lower DCR than 1008CS/HS Series Low DCR and Tight tolerance - ±5% 2.92 2.79 2.03 View Series 1812 (4532) Product series Inductance Features Length (mm) Width (mm) Height (mm) 1812FS 1.0 µH — 1000 µH Magnetically shielded for low EMI High performance in filter applications 4.95 3.81 3.43 View Series 1812LS 12 µH — 1000 µH Excellent current handling in 1812 (4532) size Tight tolerance: ±5% for all values 4.95 3.81 3.43 View Series PRODUCTS DESIGN TOOLS APPLICATIONS COILCRAFT