Miscellaneous Suppression Cores (2677006302)
77 SHIELD BEAD
77 Material
Suppression Components
Cable Component
Printer Friendly Data Sheet
Check Stock
Part Number: 2677006302
77 SHIELD BEAD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
Fair-Rite has tooled several special core geometries in the 43 & 77 material for suppression of conducted EMI.
For any non-catalog suppression core design feel free to contact our customer service or application group for feasibility and availability.
The “C” dimension, the core length, can be modified to suit specific applications.
Weight: (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 9.5 | _ | 0.374 | |
| B | 4.75 | _ | 0.193 | |
| C | 10.4 | _ | 0.409 |
Chart Legend
+ Test frequency
•Figures 3 & 4 tested in pairs
| Typical Impedance (Ω) | |
| 1 MHz | 31 |
| 10 MHz+ | 48 |
| 25 MHz+ | 31 |
These suppression cores are controlled for impedance only. The minimum impedance is typically the listed impedance less 20%.
Single turns tests are performed on the E4990A Impedance Analyzer with the shortest practical wire length.
| Typical Impendance (Ω) | |
| 1 MHz | 25 |
| 10 MHz+ | 40 |
| 25 MHz+ | 33 |
A MnZn ferrite for use in a wide range of high and low flux density inductive designs for frequencies up to 100 kHz.
Available in 77 material:
Pot Cores
E&I Cores
U Cores
Rods
Toroids
Bobbins
77 Material Characteristics
| Property | Unit | Symbol | Value |
| Initial Permeability @ B < 10 gauss | µi | 2000 | |
| Flux Density @ Field Strength | Gauss Oersted |
B H |
5100 5 |
| Residual Flux Density | Gauss | Br | 1800 |
| Coercive Force | Oersted | Hc | 0.25 |
| Loss Factor @ Frequency | 10 -6 MHz |
Tan δ/ µi | 15 0.1 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | %/°C | 1.2 | |
| Curie Temperature | °C | Tc | >200 |
| Resistivity | ohm-cm | ρ | 100 |
**** 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
Printer Friendly Data Sheet - Download as pdf file