Product Data Sheet Generated June 25, 2026
fair-rite.com

Wound Beads (2944777721)

Part No. 2944777721

Part Number

2944777721

Description

44 WOUND BEAD

Part Type

Wound Beads

Frequency Range

44 Material

Application Type

Suppression Components

Where Used

Board Component

Material Grade

Ordering Information

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
Recommended Soldering Profile

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.

Mechanical Specifications

Weight: 3.9 (g)

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

Dim	mm	mm tol	nominal inch	inch misc.
A	10	±0.25	0.394	_
B	0.9	+0.15	0.038	_
C	10	±0.25	0.394	_
D	7.5	Ref	0.295	Ref

Winding Information
Turns	Wire Size	1st Wire Length	2nd Wire Length
2 x 2½	0.65 22 AWG	38.0 ±3.0 (1.496”)	28.0 ±3.0 (1.102”)

Reel Information
Tape Width mm	Pitch mm	Parts 7" Reel	Parts 13" Reel	Parts 14" Reel
_	_	_	_	_

Electrical Specifications

Chart Legend
+ Test frequency
•A ½ turn is defined as a single pass through a hole.

Typical Impedance (Ω)
1 MHz	86
10 MHz+	425
50 MHz+	900
100 MHz+	985
200 MHz	755

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 E4990A Impedance Meter. The 61 material parts on the E4991A / HP4291B Impedance Analyzer.

Typical Impendance (Ω)
1 MHz	45
10 MHz⁺	375
50 MHz⁺	905
100 MHz⁺	500
200 MHz	400

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This document was generated automatically from Fair-Rite's product database. For the most current specifications, visit fair-rite.com.