Datasheet

ManualsBrandsKEMET ManualsFerritesFerrite Core 200Ohm @ 300MHz 1.6mm

1© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5009_B-20 • 9/18/2018

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

One world. One KEMET

EMI Cores

B-20 Bead Cores for Round Cables for

Low & High Frequency (Bare & coated)

Benets

• MnZn≤10MHz(AMbandrange)andNiZn≤300MHz

(FMbandrange)optionsavailable

• Solid construction

• Bareandcoatedtypesavailable

Overview

TheKEMETB-20seriesbeadcoresaredesignedtouseon

roundcables.ThewiderangeofManganeseZinc(MnZn)

andNickelZinc(NiZn)optionsallowsfortargetingspecic

frequencyranges.

EMIcoresarepartofafamilyofpassivecomponents,

whichaddresstheissuesofnoiseorelectromagnetic

interference(EMI)incircuitsorsystems.

Applications

• Computers

• Telecommunications

• Industrialequipment

• Adapters

• Consumer electronics

Part Number System

B-20 L- 48 B-A

Series Core Material

CoreSize

OuterDimension(mm)

Type

B-20 F = Mn-Zn

L=Ni-Zn

xx = x.x mm Blank = Bare

B/B-A=Coated(except48B)

B-L=Insulationresistancetesting

Summary of content (8 pages)

PAGE 1
EMI Cores B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Overview Applications The KEMET B-20 series bead cores are designed to use on round cables. The wide range of Manganese Zinc (MnZn) and Nickel Zinc (NiZn) options allows for targeting specific frequency ranges. • • • • • EMI cores are part of a family of passive components, which address the issues of noise or electromagnetic interference (EMI) in circuits or systems.
PAGE 2
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Core Material and Effective Frequency Range There are two ferrite material options for KEMET EMI Cores: Nickel-Zinc (NiZn) and Manganese Zinc (MnZn). Each core material has a different resistance and effective frequency range. The MnZn core material has a lower resistance compared to the NiZn; therefore, adequate insulation is required before use.
PAGE 3
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Magnetic Permeability of Ferrite Material In order to achieve most efficient noise reduction, it is important to select the material according to the target frequency band. Depending on its magnetic permeability, a particular ferrite material will be effective in a certain frequency band.
PAGE 4
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Performance Characteristics Item Performance Characteristics Operating temperature Frequency range Outer diameter Inner diameter Thickness Type −25°C to +85°C Low frequency and high frequency 2.5 – 9.7 mm 0.8 – 4.8 mm 1.2 – 8.
PAGE 5
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Impedance vs. Frequency cont. © KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.
PAGE 6
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Impedance vs. Frequency cont. Packaging Part Number B-20F-28 B-20F-38 B-20F-46 B-20F-57 B-20L-25 B-20L-34 B-20L-44 B-20L-48B B-20L-48B-L B-20L-48B-A B-20L-95B Packaging Type Pieces per Box 60,000 30,000 15,000 Bulk © KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.
PAGE 7
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) Handling Precautions EMI Cores should be stored in normal working environments. While the EMI Cores themselves are quite robust in other environments, avoid exposure to high temperatures, high humidity, corrosive atmospheres and long term storage for case, snap-on and split types. KEMET recommends that maximum storage temperature not exceed 40°C and maximum storage humidity not exceed 75% relative humidity.
PAGE 8
EMI Core – B-20 Bead Cores for Round Cables for Low & High Frequency (Bare & coated) KEMET Electronics Corporation Sales Oﬃces For a complete list of our global sales offices, please visit www.kemet.com/sales. Disclaimer All product specifications, statements, information and data (collectively, the “Information”) in this datasheet are subject to change.