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Round Cable EMI Suppression Cores (2643801902)

Part Number: 2643801902
Broadband Frequencies 25-300 MHz (43 material)
Suppression Components
Cable Component
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Part Number: 2643801902


Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
•– Last digit 2 = Burnished (All cable cores have been burnished to remove the sharp edges)

Fair-Rite offers a broad selection of ferrite EMI suppression cable cores in several materials with guaranteed minimum impedance specifications.

•For smaller suppression parts, refer to the section “EMI Suppression Beads”.

Our “Expanded Cable and Suppressor Kit” (part number 0199000005) contains a selection of these suppression cores.

•For any cable suppression core not listed here, feel free to contact our customer service group for availability and pricing.

The “C” dimension, the core length, can be modified to suit specific applications.

Weight: 4.7 (g)

Dimmmmm tolnominal inchinch misc.

Chart Legend
+ Test frequency

The column “H (Oe)” gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in the application is this value of “H” times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material, see figures 18-23 in the application note “How to choose Ferrite Components for EMI Suppression”.

Typical Impedance (Ω)
10 MHz29
25 MHz+44
100 MHz+73
250 MHz91
Electrical Properties

Suppression cable cores are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%.

•Single turn impedance tests for 31, 43 and 46 material cores are performed on the 4193A Vector Impedance Meter. The 61 material parts are tested on the 4191A RF Impedance Analyzer and 75 material parts are tested on the 4285A LCR Meter. Cores are tested with the shortest practical wire length.

Typical Impendance (Ω)
10 MHz 29
25 MHz+ 44
100 MHz+ 73
250 MHz 91

This NiZn is our most popular ferrite for suppression of conducted EMI from 20 MHz to 250 MHz. This material is also used for inductive applications such as high frequency common-mode chokes.

Available in 43 material:
EMI Suppression Beads
Beads On Leads
SM beads
Multi-Aperture Cores
Round Cable EMI Suppression Cores
Round Cable Snap-Its
Flat Cable EMI Suppression Cores
Flat Cable Snap-Its
Miscellaneous Suppression Cores

43 Material Characteristics
Property Unit Symbol Value
Initial Permeability@ B < 10 gauss µi 800
Flux Density @ Field Strength Gauss
Residual Flux Density Gauss Br 1300
Coercive Force Oersted Hc 0.45
Loss Factor @ Frequency 10 -6
Tan δ/ µi 250
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 1.25
Curie Temperature °C Tc >130
Resistivity ohm-cm ρ 1×105

**** Characteristic curves are measured on standard Toroids (18/10/6 mm)  at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.

Ferrite Material Constants

Specific Heat
0.25 cal/g/°C
Thermal Conductivity
3.5 - 4.5 mW/cm-°C
Coefficient of Linear Expansion
8 - 10x10-6/°C
Tensile Strength
4.9 kgf/mm2
Compressive Strength
42 kgf/mm2
Young's Modulus
15x103 kgf/mm2
Hardness (Knoop)
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.

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