Product Data Sheet Generated June 18, 2026
fair-rite.com

Round Cable EMI Suppression Cores (2631803802)

Part No. 2631803802
Round Cable EMI Suppression Cores (2631803802)
Part Number
2631803802
Description
31 ROUND CABLE CORE
Part Type
Round Cable EMI Suppression Cores
Frequency Range
31 Material®
Application Type
Suppression Components
Where Used
Cable Component
Material Grade
31
Ordering Information

Part Number: 2631803802

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.

Mechanical Specifications

The C dimension, the core length, can be modified to suit specific applications.

Weight: 118 (g)

Chart Legend
•Dimensions (Top numbers are in millimeters, bottom numbers are in nominal inches.).

Dimmmmm tolnominal inchinch misc.
A61±1.302.4_
B35.55±0.851.4_
C12.7±0.500.5_

Electrical Specifications

Chart Legend
+ Test frequency

Typical Impedance (Ω)
1 MHz10.2
5 MHz32.5
10 MHz+41
25 MHz+61
100 MHz+110
250 MHz175
Electrical Properties
H(Oe)0.09

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 E4991A/HP4291B Impedance Analyzer. The 61 material parts are tested on the E4991A / HP4291B Impedance Analyzer and 75 material parts are tested on the E4990A Impedance Analyzer. Cores are tested with the shortest practical wire length.

Typical Impendance (Ω)
1 MHz 12
5 MHz 28
10 MHz+ 40
25 MHz+ 63
100 MHz+ 119
250 MHz 215

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This document was generated automatically from Fair-Rite's product database. For the most current specifications, visit fair-rite.com.