Round Cable EMI Suppression Cores
(2631103002)
Part Number: 2631103002
31 ROUND CABLE CORE
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 2 = Burnished (All cable cores have been burnished to remove the sharp edges)
Fair- Rite offers a broad selection of ferrite EMI suppression cable cores in several materials with guaranteed minimum
impedance specifications.
For smaller suppression parts, refer to the section EMI Suppression Beads.
Our Expanded Cable and Suppressor Kit (part number 0199000005) contains a selection of these suppression cores.
For any cable suppression core not listed here, feel free to contact our customer service group for availability and
pricing.
Catalog Drawing
3D Model
The C dimension, the core length, can be modified to suit specific applications.
Weight: 116 (g)
Chart Legend
+ Test frequency
The column “H (Oe)” gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The
actual dc H field in the application is this value of “H” times the actual NI (ampere- turn) product. For the effect of the dc bias
on the impedance of the bead material, see figures 18-23 in the application note How to choose Ferrite Components for EMI
Suppression.
Typical Impedance (Ω)
1 MHz 37
5 MHz 98
10 MHz+120
25 MHz+205
100 MHz+340
250 MHz 315
Electrical Properties
H(Oe) 0.17
Suppression cable cores are controlled for impedances only. Minimum impedance values are specified for the + marked
Dim mm mm tol nominal inch inch misc.
A 31.6 ±0.75 1.244 _
B 19.55 ±0.50 0.77 _
C 50.8 ±1.00 2 _
Suppression cable cores are controlled for impedances only. Minimum impedance values are specified for the + marked
frequencies. The minimum impedance is typically the listed impedance less 20%.
Single turn impedance tests for 31, 43 and 46 material cores are performed on the 4193A Vector Impedance Meter. The 61
material parts are tested on the 4191A RF Impedance Analyzer and 75 material parts are tested on the 4285A LCR Meter. Cores
are tested with the shortest practical wire length.
Fair- Rite Products Corp. • One Commercial Row, Wallkill, New York 12589-0288
888-324-7748 • 845-895-2055 • Fax: 845-895-2629 • ferrites@fair- rite.com • www.fair- rite.com