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Round Cable Snap-Its (0446173551)

Part Number: 0446173551
Broadband Frequencies 25-300 MHz (Economical 46 material)
Suppression Components
Cable Component
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Part Number: 0446173551


Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade

Round cable snap-its can easily accommodate round cables or bundled wires with diameters from 2.5 mm (0.100”) to 25.4 mm (1.000”). These assemblies are available in four ferrite material classes to suppress differential or common-mode conducted EMI from 1 MHz into the GHz region. The polypropylene cases are meeting the RoHS restrictions of hazardous substances and have a flammability rating of UL 94 V-0.

•Many of the snap-it parts have round core equivalents. See “Round Cable EMI Suppression Cores”.

•Round Cable Snap-It Kits are available for each of the four suppression materials. 31 Snap-It Kit (0199000030), 43 Snap-It Kit (0199000031), 46 Core and Snap-It Kit (0199000032) and 61 Snap-It Kit (0199000033).

The “B” dimension is the core inside diameter.

Weight: 78 (g)

Dimmmmm tolnominal inchinch misc.
Cable Information
Max DiameterMax DimensionSolid EquivalentFlat Cable Cores

Chart Legend
+ Test frequency
•For solid cable cores, see Round Cable EMI Suppression Cores

Typical Impedance (Ω)
10 MHz48
25 MHz85
100 MHz+176
250 MHz300

• Round cable snap-it assemblies 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 the 31, 43/44 and 46 material parts are performed on the 4193A Vector Impedance Analyzer. The 61 material parts are tested on the 4291A RF Impedance Analyzer and 75 material parts are tested on the 4285A LCR Meter.. Cores are tested with the shortest practical wire length.

Typical Impendance (Ω)
10 MHz 48
25 MHz 85
100 MHz+ 176
250 MHz 300

Our latest material development is a MgZn ferrite intended for suppression applications. This material does not use nickel in its composition, hence it avoids potential environmental issues as well as reduces the cost of the material component of suppression parts. The suppression performance of this 46 material is similar to our widely used 43 material.

This new Fair-Rite grade 46 is supplied in the larger sizes of the round cable EMI suppression and snap-it cores.

46 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 500
Flux Density @ Field Strength Gauss
Residual Flux Density Gauss Br 1900
Coercive Force Oersted Hc 0.40
Loss Factor @ Frequency 10 -6
Tan δ/ µi 60
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C
Curie Temperature °C Tc >140
Resistivity ohm-cm ρ 1×108

**** Characteristic curves are measured on standard Toroids (18/10/6 mm)  at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.

Ferrite Material Constants

Specific Heat
0.25 cal/g/°C
Thermal Conductivity
3.5 - 4.5 mW/cm-°C
Coefficient of Linear Expansion
8 - 10x10-6/°C
Tensile Strength
4.9 kgf/mm2
Compressive Strength
42 kgf/mm2
Young's Modulus
15x103 kgf/mm2
Hardness (Knoop)
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.

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