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Multi-Aperture cores (2843000302)

Part Number: 2843000302
43 MULTI-APERTURE CORE
Suppression Applications for Broadband Frequencies 20-300 MHz (43 material)
Suppression Components
Board Component
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Multi-Aperture cores

Part Number: 2843000302

43 MULTI-APERTURE CORE

Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
•– Last digit 2 = Burnished

Multi-aperture cores are used in suppression applications and in balun (balance-unbalance) and other broadband transformers. They are also employed in airbag designs to prevent accidental activation.

•All multi-aperture cores are supplied burnished.

•Our “Multi-Aperture Core Kit” (part number 0199000036) is available for prototype evaluation.

For any multi-aperture requirement not listed here, feel free to contact our customer service group for availability and pricing. 

Weight: 2.6 (g)

Dimmmmm tolnominal inchinch misc.
A13.3±0.600.525_
B10.3±0.300.407_
C7.5±0.350.295_
E5.7±0.250.225_
H3.8±0.250.15_

Chart Legend
+ Test frequency

Typical Impedance (Ω)
25 MHz104
100 MHz+130

Multi-aperture cores in 73 and 43 materials are controlled for impedance only. The 61 NiZn material is controlled for both impedance and AL value. The high frequency 67 material is controlled for AL value. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%.

•Multi-aperture cores in 73 and 43 material are measured for impedance on the 4193A Vector Impedance Analyzer. The 61 and 67 multi-aperture cores are tested on the 4291A Impedance Analyzer. All impedance measurements are performed with a single turn to both holes, using the shortest practical wire length.

•The 61 and 67 material multi-hole beads are tested for AL value. The test frequency is 10 kHz at < 10 gauss. The test winding is five turns wound through both holes.

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
Bobbins
Toroids

43 Material Characteristics
Property Unit Symbol Value
Initial Permeability@ B < 10 gauss µi 800
Flux Density @ Field Strength Gauss
Oersted
B
H
2900
10
Residual Flux Density Gauss Br 1300
Coercive Force Oersted Hc 0.45
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 250
1.0
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)
650
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.


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