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Miscellaneous Suppression Cores (2677006302)

Part Number: 2677006302
77 SHIELD BEAD
Lower Frequencies < 50 MHz (77 material)
Suppression Components
Cable Component
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Part Number: 2677006302

77 SHIELD BEAD

Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade

Fair-Rite has tooled several special core geometries in the 43 & 77 material for suppression of conducted EMI.

•For any non-catalog suppression core design feel free to contact our customer service or application group for feasibility and availability.

The “C” dimension, the core length, can be modified to suit specific applications.

Weight: 2.2 (g)

Dimmmmm tolnominal inchinch misc.
A9.5±0.250.375_
B4.75+0.300.193_
C10.4±0.250.41_

Chart Legend
+ Test frequency
•Figures 3 & 4 tested in pairs

Typical Impedance (Ω)
1 MHz25
10 MHz+40
25 MHz+33

These suppression cores are controlled for impedance only. The minimum impedance is typically the listed impedance less 20%. Single turns tests are performed on the 4193A Vector Impedance Analyzer with the shortest practical wire length.

Typical Impendance (Ω)
1 MHz 25
10 MHz+ 40
25 MHz+ 33

A MnZn ferrite for use in a wide range of high and low flux density inductive designs for frequencies up to 100 kHz.

Available in 77 material:

Pot Cores

E&I Cores

U Cores

Rods

Toroids

Bobbins

77 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 2000
Flux Density @ Field Strength Gauss
Oersted
B
H
5100
5
Residual Flux Density Gauss Br 1800
Coercive Force Oersted Hc 0.25
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 15
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 0.7
Curie Temperature °C Tc >200
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.

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.


Storage and Operating Temperature
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