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Multi-Aperture cores (2820002702)

Part Number: 2820002702
20 MULTI-APERTURE CORE
Suppression and Broadband Applications 1 u2013 300MHz (15 and 20 materials)
Suppression Components
Board Component
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Part Number: 2820002702

20 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. 

Catalog Drawing
3D Model

Weight: 0.3 (g)

Dimmmmm tolnominal inchinch misc.
A7±0.250.276_
B3.1±0.250.122_
C4.2-0.250.16_
E2.9±0.100.114_
H1.7+0.200.071_

Chart Legend
+ Test frequency

Typical Impedance (Ω)
25 MHz37
100 MHz+49

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 listed on our catalog drawing.

Multi-aperture cores in 73 and 43 material are measured for impedance on the E4990A Impedance Analyzer. The 15, 20, 61 and 67 multi-aperture cores are tested on the E4991A / HP4291B 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.

CSV Download

 

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.


Storage and Operating Temperature
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