Wound Beads (2944777721)
Part Number: 2944777721
44 WOUND BEAD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 1 = Bulk Packed 4 = Taped and Reeled
Six and eleven hole beads, in two NiZn materials, are available both as beads (product class 26) and wound with tinned
copper wire in several winding configurations (product class 29).
Wire used for winding is oxygen free high conductivity copper with 100% matte tin plating over a nickel undercoating.
Recommended storage temperature and operating temperature is -55 °C to 125 °C
Packaging Options:
– Parts with a 1 as the last digit of the part number are supplied bulk packed. Wound beads with part numbers 29– 666631
and 29– 666651 can be supplied radially taped and reeled per IEC 60286-1 and EIA 468- B standards. For these taped and reeled
wound beads the last digit of the part number is a 4. Taped and reeled wound beads are supplied 500 pieces on a 13 reel.
For any wound bead requirement not listed in here, please contact our customer service group for availability and
pricing.
Weight: 3.9 (g)
Dim mm mm tol
A
10
±0.25
B
0.9 +0.15
C
10
±0.25
D
7.5 Ref
nominal inch
0.394
0.038
0.394
0.295
inch misc.
_
_
_
Ref
Winding Information
Turns Tests Wire Size 1st Wire Length
0.65
38.0 ±3.0
2 x 2½
22 AWG (1.500”)
2nd Wire Length
28.0 ±3.0
(1.102”)
Chart Legend
+ Test frequency
•A ½ turn is defined as a single pass through a hole.
Typical Impedance (Ω)
1 MHz
45
+
10 MHz
375
+
50 MHz
905
+
100 MHz
500
200 MHz
400
Beads are controlled for impedance limits only. Minimum impedance values are specified for the + marked frequencies. The
minimum impedance is typically the listed impedance less 20%.
The 44 material beads and wound beads are tested on the 4193A Vector Impedance Meter. The 61 material parts on the 4291A RF
Impedance Analyzer.
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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