Multi- Aperture cores (2843002402)
Part Number: 2843002402
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.
Catalog Drawing
3D Model
Weight: 0.5 (g)
Chart Legend
+ Test frequency
Typical Impedance (Ω)
25 MHz 74
100 MHz+106
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.
Catalog Drawing
Multi- aperture cores in 73 and 43 material are measured for impedance on the E4990A Impedance Analyzer. The 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.
Dim mm mm tol nominal inch inch misc.
A 7 ±0.25 0.276 _
B 6.2 ±0.25 0.244 _
C 4.2 -0.25 0.16 _
E 2.9 ±0.10 0.114 _
H 1.7 +0.20 0.071 _
