EMI Suppression Beads (2661000301)
Part Number: 2661000301
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: 0.18 (g)
Dim mm mm tol
A
3.5 ±0.20
B
1.3 ±0.10
C
6
±0.25
nominal inch
0.138
0.051
0.236
inch misc.
_
_
_
Chart Legend
+ Test frequency
• The column "H (Oe)" 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 “H” 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
54
+
250 MHz
82
+
500 MHz
103
1000 MHz
120
Electrical Properties
H(Oe)
2
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 4193A Vector Impedance Analyzer. The 61
material beads are tested on the 4291A RF Impedance Analyzer. Beads are tested with the shortest practical wire length.
Fair- Rite Products Corp.
•
One Commercial Row, Wallkill, New York 12589-0288
888-324-7748 • 845-895-2055 • Fax: 845-895-2629 • ferrites@fair- rite.com • www.fair- rite.com
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