EMI Suppression Beads (2661375102)Part Number: 2661375102
61 SHIELD BEAD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 1= Not Burnished 2 = Burnished
– The last digit of the Parylene coated part is a “4,” which is available upon request. The minimum coating thickness beads is 0.005 mm (0.0002″).
Fair-Rite offers a broad selection of ferrite EMI suppression beads with guaranteed minimum impedance specifications.
Our “Shield Bead Kit” (part number 0199000019) contains a selection of these beads.
For any EMI suppression bead requirement not listed here, feel free to contact our customer service for availability and pricing.
The C dimension, the bead length, can be modified to suit specific applications.
Weight: 2.5 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 9.5 | ±0.25 | 0.374 | _ |
| B | 4.5 | +0.75 | 0.192 | _ |
| C | 6.35 | ±0.35 | 0.25 | _ |
Chart Legend
+ Test frequency
•The column u201cH (Oe)u201d gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in the application is this value of u201cHu201d times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material, see figures 18-23 in the application note How to choose Ferrite Components for EMI Suppression.
| Typical Impedance (Ω) | |
| 100 MHz | 53 |
| 250 MHz+ | 74 |
| 500 MHz+ | 97 |
| 1000 MHz | 146 |
| Electrical Properties | |
| H(Oe) | 0.6 |
Suppression beads 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 73 and 43 material beads are performed on the E4990A Impedance Analyzer. The 61 material beads are tested on the E4991A / HP4291B Impedance Analyzer. Beads are tested with the shortest practical wire length.
| Typical Impendance (Ω) | |
| 100 MHz | 42 |
| 250 MHz+ | 63 |
| 500 MHz+ | 83 |
| 1000 MHz | 117 |
