Oval Clip-It Core (0331184751)
31 OVAL CABLE CORE ASSEMBLY
31 Material
Suppression Components
Cable Component
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Part Number: 0331184751
31 OVAL CABLE CORE ASSEMBLY
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
The B dimension is the core inside diameter.
Weight: 65 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 30.43 | +/- 1.0 | 1.20 | _ |
| B | 19.20 | _ | 0.75 min | |
| C | 29.90 | +/- 1.0 | 1.18 | _ |
| D | 23.0 | +/- 1.0 | 0.91 | _ |
| E | 9.2 | _ | 0.36 min |
Chart Legend
+ Test frequency
•For solid cable cores, see Round Cable EMI Suppression Cores
| Typical Impedance (Ω) | |
| 10 MHz | 59 Min |
| 25 MHz+ | 89 Min |
| 100 MHz+ | 150 Min |
| Electrical Properties | |
| Ae(cm2) | 1.27 |
| Σl/A(cm-1) | 0.0583 |
| le(cm) | 7.41 |
| Ve(cm3) | 9.410 |
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 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) | |
| 10 MHz | 59 |
| 25 MHz+ | 89 |
| 100 MHz+ | 150 |
A MnZn ferrite designed specifically for EMI suppression applications from as low as 1 MHz up to 500 MHz. This material does not have the dimensional resonance limitations associated with conventional MnZn ferrite materials.
Available in 31 Material®:
Round Cable EMI Suppression Cores
Round Cable Snap-Its
Flat Cable EMI Suppression Cores
Flat Cable Snap-Its
31 Material® Characteristics
| Property | Unit | Symbol | Value |
| Initial Permeability@B < 10 gauss | µi | 1500 | |
| Flux Density @ Field Strength | Gauss Oersted |
B H |
3600 5 |
| Residual Flux Density | Gauss | Br | 2600 |
| Coercive Force | Oersted | Hc | 0.34 |
| Loss Factor @ Frequency | 10 -6 MHz |
Tan δ/ µi | 20 0.1 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | %/°C | 1.3 | |
| Curie Temperature | °C | Tc | >130 |
| Resistivity | Ω cm | ρ | 3000 |
**** 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.
Material Safety Data Sheet (MSDS)
Click here to download Complex Permeability vs. Frequency (CSV)
Ferrite Material Constants
Storage and Operating Temperature
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