The 0431164181 is a round Ferrite Core Assembly for 12.7mm cable. The common-mode conducted EMI from 1MHz to 300MHz frequency range. The polypropylene cases are meeting the RoHS restrictions of hazardous substances and have a flammability rating of UL94 V-0. Round cable snap-it assemblies are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies.
Minimum Impedance is Typically the Listed Impedance Less 20%
Single Turn Impedance Tests for the 31 Material Performed on the 4193A Vector Impedance Analyser
Many of the Snap-it Parts Have Round Core Equivalents