Multi- Aperture cores (2861002402) Part Number: 2861002402 67 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) 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 _ Chart Legend + Test frequency Typical Impedance (Ω) 100 MHz 80 250 MHz+ 118 Electrical Properties A (nH) 160 Min L Multi- aperture cores in 73 and 43 materials are controlled for impedance only. The 61 NiZn material is controlled for both impedance and A value. The high frequency 67 material is controlled for A value. Minimum impedance values are specified for L L 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 A value. The test frequency is 10 kHz at < 10 gauss. The test winding is L five turns wound through both holes.

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