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PC Beads (Through Hole)

Part Number: 2944778101
44 PC BEAD
Broadband Frequencies 10-300 MHz (44 material)
Suppression Components
Board Component
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PC Beads (Through Hole)

Part Number: 2944778101

44 PC BEAD

Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 1 = Standard Wire Length 2.4 mm (0.095″) Minimum, 2 = Wire Length 3.1 mm (0.122”) Minimum

Multiple single turn or multi-turn printed circuit EMI suppression beads are available in two Fair-Rite materials. The broadband 44 material and in the high frequency 52 material grade.

Wires are oxygen free high conductivity copper with 100% matte tin plating over a nickel undercoating. Wires on top of the beads are covered with a layer of epoxy.

•Recommended operating and storage temperature for the PC Beads is -55 °C to +125 °C.

•PC Beads can be supplied with lower component heights “C”. Also, the wire length “F” can be modified to specific requirements.

Weight: 2.7 (g)

Dimmmmm tolnominal inchinch misc.
A11.2-0.500.43_
B5.75-0.500.216_
C11.8Max0.464Max
D2.54±0.100.1_
E2.54±0.100.1_
F2.4Min0.095Min
G0.65_022 AWG

Chart Legend
+ Test frequency

Typical Impedance (Ω)
10 MHz115
25 MHz+188
100 MHz+288
250 MHz305

•PC Beads are controlled for impedance only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%.

The PC Beads in 44 material are measured on the 4193A Vector Impedance Analyzer. The 52 PC Beads are tested for impedance on the 4291A RF Impedance Analyzer.

Typical Impendance (Ω)
10 MHz 115
25 MHz+ 188
100 MHz+ 288
250 MHz 305

A NiZn ferrite developed to combine a high suppression performance, from 30 MHz to 500 MHz, with a very high DC resistivity.

Available in 44 material:
SM Beads
PC Beads
Wound Beads
Round Cable Snap-Its
Connector EMI Suppression Plates

44 Material Characteristics
Property Unit Symbol Value
Initial Permeability@ B < 10 gauss µi 500
Flux Density @ Field Strength Gauss
Oersted
B
H
3000
10
Residual Flux Density Gauss Br 1100
Coercive Force Oersted Hc 0.45
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 125
1.0
Temperature Coefficient of Initial Permeability (20 -70°C) % / °C 0.75
Curie Temperature °C Tc >160
Resistivity ohm-cm ρ 1×109

**** Characteristic curves are measured on standard Toroids (18/10/6 mm)  at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.

Ferrite Material Constants

Specific Heat
0.25 cal/g/°C
Thermal Conductivity
3.5 - 4.5 mW/cm-°C
Coefficient of Linear Expansion
8 - 10x10-6/°C
Tensile Strength
4.9 kgf/mm2
Compressive Strength
42 kgf/mm2
Young's Modulus
15x103 kgf/mm2
Hardness (Knoop)
650
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.


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