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