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PC Beads (Through Hole)
44 PC BEAD
Broadband Frequencies 10-300 MHz (44 material)
Suppression Components
Board Component
Printer Friendly Data Sheet
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Part Number: 2944778301
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: 6 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 11.2 | -0.50 | 0.431 | _ |
| B | 11.2 | -0.50 | 0.431 | _ |
| C | 11.8 | Max | 0.464 | Max |
| D | 2.54 | ±0.10 | 0.1 | _ |
| E | 7.6 | ±0.20 | 0.299 | _ |
| F | 2.79 | ±0.25 | 0.110 | _ |
| G | 0.65 | _ | 0 | 22 AWG |
Chart Legend
+ Test frequency
| Typical Impedance (Ω) | |
| 10 MHz | 142 |
| 25 MHz+ | 224 |
| 100 MHz+ | 372 |
| 250 MHz | 402 |
PC Beads are controlled for impedance only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is listed on our catalog drawing.
The PC Beads in 44 material are measured on the E4990A Impedance Analyzer. The 52 PC Beads are tested for impedance on the E4991A / HP4291B Impedance Analyzer.
| Typical Impendance (Ω) | |
| 10 MHz | 142 |
| 25 MHz+ | 219 |
| 100 MHz+ | 338 |
| 250 MHz | 335 |
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 [email protected] 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 | 150 1.0 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | % / °C | 1.6 | |
| 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.
Material Safety Data Sheet (MSDS)
Click here to download Complex Permeability vs. Frequency (CSV)
Ferrite Material Constants
Storage and Operating Temperature
Printer Friendly Data Sheet - Download as pdf file
