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Multi-Aperture cores (2873000102)

Part Number: 2873000102
73 MULTI-APERTURE CORE
Suppression Applications for Lower Frequencies < 50 MHz (73 material)
Suppression Components
Board Component
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Part Number: 2873000102

73 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: 3.5 (g)

Dimmmmm tolnominal inchinch misc.
A13.3±0.600.525_
B13.4±0.300.528_
C7.5±0.350.295_
E5.7±0.250.225_
H3.8±0.250.15_

Chart Legend
+ Test frequency

Typical Impedance (Ω)
10 MHz127
25 MHz+93

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.

A MnZn ferrite supplied only in small cores to suppress conducted EMI frequencies below 50 MHz.

Available in 73 material:
EMI Suppression Beads
Beads On Leads
SM beads
Multi-Aperture Cores

73 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 2500
Flux Density @ Field Strength Gauss
Oersted
B
H
3900
5
Residual Flux Density Gauss Br 3200
Coercive Force Oersted Hc 0.28
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 20
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 1.3
Curie Temperature °C Tc >130
Resistivity ohm-cm ρ 3000

**** 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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