Wirewound Ferrite Beads

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

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