Ferrites for EMC

sheets TDK offers a wide range of ferrite cores applied fort EMI Suppression. Depending on the field of application, TDK engineers offer high-tech and cost-effective solutions with various technical performance.

Special attention is drawn to ferrite beads (cores with holes, across which current conductive wire goes through. For example, at the present moment, TDK manufactures ferrite beads (BB series) on the base of NiZn materials such as HF30, HF40, HF57, HF70 characterizing by a high value of impedance.

BB ferrite cores can be applied in:

  • Imaging devices, audio equipment, automotive electronics, telecommunication devices, office automation equipment, and digital interface various other cables.
  • Absorption EMI and penetrating noise
  • Preventing parasitic oscillation

PDF data sheet on ferrite beads (BB series)  pdf_icon.png

BB cores dimensions

BBloup
Ordering code Material Dimensions Impedance (Z) at 23 °С, [Ω]
A B C 10MHz 100MHz
HF30BB1.8X5X0.7 HF30 1.8±0.15 5.0±0.3 0.7±0.1 3.4 36
HF30BB2.5X2X0.8 HF30 2.5±0.15 2.0±0.2 0.8±0.1 1.9 20
HF30BB3X5X1 HF30 3.0±0.15 5.0±0.3 1.0±0.1 3.3 37
HF30BB3.5X5X1.3 HF30 3.5±0.15 5.0±0.3 1.3±0.1 3.2 32
HF30BB5X5X2 HF30 5.0±0.15 5.0±0.3 2.0±0.15 2.7 33
HF30BB6.4X5X3.2 HF30 6.4±0.2 5.0±0.2 3.2±0.15 2.6 26
HF40BB1.7X1.9X0.7 HF40 1.7±0.15 1.9±0.2 0.7±0.1 1.8 16
HF40BB3X5X1 HF40 3.0±0.15 5.0±0.3 1.0±0.1 9 60
HF40BB3.4X3X1 HF40 3.4±0.15 3.0±0.2 1.0±0.1 7 39
HF40BB3.5X5X1.3 HF40 3.5±0.15 5.0±0.3 1.3±0.1 9.1 50
HF40BB4.5X5X1.6 HF40 4.5±0.15 5.0±0.3 1.6±0.1 11 60
HF40BB5X5X2 HF40 5.0±0.15 2.0±0.15 9.4 52  
HF40BB5X6X2.5 HF40 5.0±0.15 6.0±0.3 2.5±0.15 10 50
HF40BB5.5X5X2.5 HF40 5.5±0.2 5.0±0.3 2.5±0.15 8.1 43
HF57BB2.85X2X1.35 HF57 2.85±0.1 2.0±0.15 1.35±0.1 8 23
HF57BB2.85X5X1.35 HF57 2.85±0.1 5.0±0.2 1.35±0.1 20 54
HF57BB3.35X2X2 HF57 3.35±0.2 2.0±0.1 2.0±0.2 6 20
HF57BB3.5X1X1.6 HF57 3.5±0.15 1.0+0, -0.2 1.6±0.1 4.5 17
HF57BB3.5X1.5X1.3 HF57 3.5±0.15 1.5±0.15 1.3±0.1 9 23
HF57BB3.5X3X1.3 HF57 3.5±0.15 3.0±0.2 1.3±0.1 16 40
HF57BB3.5X5X1.3 HF57 3.5±0.15 5.0±0.3 1.3±0.1 28 65
HF57BB3.6X3.2X2.7 HF57 3.6±0.15 3.2±0.2 2.7±0.15 6 17
HF57BB4X2X2 HF57 4.0±0.15 2.0±0.15 2.0±0.15 8 24
HF57BB4X5X2 HF57 4.0±0.15 5.0±0.3 2.0±0.15 19 46
HF57BB4.5X4X2.5 HF57 4.5±0.15 4.0±0.15 2.5±0.15 14 37
HF57BB4.8X4.8X2.4 HF57 4.8±0.2 4.8±0.2 2.4±0.15 18 49
HF57BB5X5X2 HF57 5.0±0.15 5.0±0.3 2.0±0.15 25 59
HF70BB1.8X5X0.7 HF70 1.8±0.15 5.0±0.3 0.7±0.1 31 48
HF70BB2.5X2.2X0.8 HF70 2.5±0.15 2.2±0.2 0.8±0.1 15 27
HF70BB2.5X5X0.8 HF70 2.5±0.15 5.0±0.3 0.8±0.1 31 51
HF70BB3X5X1 HF70 3.0±0.15 5.0±0.3 1.0±0.1 33 53
HF70BB3.4X3X1 HF70 3.4±0.15 3.0±0.2 1.0±0.1 22 36
HF70BB3.5X2X1.3 HF70 3.5±0.15 2.0±0.15 1.3±0.1 13 24
HF70BB3.5X5X0.8 HF70 3.5±0.15 5.0±0.3 0.8±0.1 40 68
HF70BB3.5X3X1.3 HF70 3.5±0.15 3.0±0.2 1.3±0.1 17 28
HF70BB3.5X5X1.3 HF70 3.5±0.15 5.0±0.3 1.3±0.1 29 49
HF70BB3.5X10X1.3 HF70 3.5±0.15 10.0±0.4 1.3±0.1 53 92
HF70BB3.5X10X1.3 HF70 3.5±0.15 10.0±0.4 1.3±0.1 53 92
HF70BB4.5X4X2.5 HF70 4.5±0.15 4.0±0.2 2.5±0.15 17 30
HF70BB4.5X5X1.6 HF70 4.5±0.15 5.0±0.3 1.6±0.1 31 53
HF70BB4X15X1.35 HF70 4.0+0.1, -0.2 15.0±0.5 1.35±0.1 92 155
HF70BB5X5X2 HF70 5.0±0.15 5.0±0.3 2.0±0.15 27 42
HF70BB5.5X5X2.5 HF70 5.5±0.2 5.0±0.3 2.5±0.15 22 38
HF70BB6X3.8X3 HF70 6.0±0.2 3.8±0.2 3.0±0.2 19 31
HF70BB6.4X4.5X3.2 HF70 6.4±0.2 4.5±0.2 3.2±0.15 22 37
HF70BB6.4X5X3.2 HF70 6.4±0.2 5.0±0.2 3.2±0.15 20 32
HF70BB6.4X10X3.2 HF70 6.4±0.2 10.0±0.5 3.2±0.15 40 63
HF70BB9X5X4.5 HF70 9.0±0.25 5.0±0.3 4.5±0.15 20 34
HF70BB9X10X4.5 HF70 9.0±0.25 10.0±0.4 4.5±0.15 40 68
HF70BB9.5X10.4X4.9 HF70 9.5±0.25 10.42±0.25 4.9±0.15 40 70

Information for Ordering

Bead cores series are easy to handle and are supplied in various materials, shapes and packaging styles to meet for users’ requests

Example of ordering code structure: 

HF30 BB 1.8x0.5x0.7 —part number of the ferrite core
BB — core's type
1.8 — outer diameter (А, mm)
0.5 — length (В, mm)
0.7 — inner diameter (С, mm)
HF30 — material HF30