EMI Suppression Beads (2673012401)
73 SHIELD BEAD
73 Material
Suppression Components
Board Component
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Part Number: 2673012401
73 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: 0.02 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 1.55 | -0.10 | 0.059 | _ |
| B | 0.95 | +0.15 | 0.04 | _ |
| C | 4.2 | -0.25 | 0.16 | _ |
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) | |
| 1 MHz | 4 |
| 5 MHz | 9.5 |
| 10 MHz+ | 14 |
| 25 MHz+ | 20 |
| Electrical Properties | |
| H(Oe) | 3.3 |
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 E4990A Impedance Analyzer. The 61 material beads are tested on the E4991A / HP4291B Impedance Analyzer. Beads are tested with the shortest practical wire length.
| Typical Impendance (Ω) | |
| 1 MHz | 3.5 |
| 5 MHz | 8.6 |
| 10 MHz+ | 11 |
| 25 MHz+ | 19 |
A MnZn ferrite supplied only in small cores to suppress conducted EMI frequencies below 50 MHz.
Available in 73 material:
EMI Suppression Beads
Beads On Leads
SM beads
Multi-Aperture Cores
73 Material Characteristics
| Property | Unit | Symbol | Value |
| Initial Permeability @ B < 10 gauss | µi | 2500 | |
| Flux Density @ Field Strength | Gauss Oersted |
B H |
4200 5 |
| Residual Flux Density | Gauss | Br | 1100 |
| Coercive Force | Oersted | Hc | 0.18 |
| Loss Factor @ Frequency | 10 -6 MHz |
Tan δ/ µi | 10 0.1 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | %/°C | 0.5 | |
| Curie Temperature | °C | Tc | >160 |
| Resistivity | ohm-cm | ρ | 100 |
**** 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
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