|
67 Material Characteristics |
|
Property |
Item |
Unit/
Symbol |
Value |
Max.
Permeabilität |
Freq. MHz Reso-nanz |
Freq. MHz
Breit-band |
Freq.
MHz
Drossel |
|
|
Initial Permeability@ B < 10 gauss |
|
µi |
40 |
125 |
15-25 |
50-500 |
500-2000 |
|
Flux Density @ Field Strength |
Gauss
Oersted |
B
H |
2500
20 |
Mittlere Feld-
Linienlänge
2.07 cm |
Oberfläche
0.15 cm³ |
Volumen
0.072 cm² |
|
Residual Flux Density |
Gauss |
Br |
800 |
|
|
|
|
Coercive Force |
Oersted |
|
3.5 |
Sättigungsflußdichte
10 Oe (Gauß)
2500 |
Vol.Widerstand Ω/cm
1×107 |
|
Loss Factor @ Frequency |
10 -6
MHz |
Tan δ/ µi |
200
50 |
Remanenzflußdichte
10 Oe (Gauß)
1000 |
Σl/A(cm-1)
28.6 |
|
Temperature Coefficient of Initial Permeability (20 -70°C) |
%/°C |
|
0.05 |
Density gm/cm3
≈4.7 g/cm3 |
|
Curie Temperature |
°C |
Tc |
>475 |
|
Resistivity |
Ohm-cm |
Ρ
1×107 |
|
|
Electrical Specifications |
|
Bestellnr. |
Kern-Material |
Item |
Unit/Symbol |
Condition |
Value |
AL-Toleranz |
|
|
FT37-67 |
Ferrit Toroid |
AL |
nH/N2 |
@ 10 KHz |
18 |
+35%, -25% |
|
NiZn |
|
|
Le |
cm |
N/A |
2.07 |
±10% |
|
Ae |
cm² |
N/A |
0.072 |
±10% |
|
Ve |
cm³ |
N/A |
0.15 |
±10% |
|
Initial Permeability |
µ0 |
@ B < 10 gauss |
40 |
±25% |
|
Temp. Coeff. Of initial
Permeability |
% °C |
20-70°C |
0.05 |
Typ. |
|
Coercive Force |
Hc |
oersted |
3.5 |
Typ. |
|
Residual Flux Density |
Gauss, Br |
N/A |
800 |
Typ. |
|
Flux Density |
Gauss, B |
Initial (B), oersted |
2500 |
Typ. |
|
|
Gauss, H @ |
@ Field Strength (H), oersted |
15 |
Typ. |
|
Curie temperature |
°C |
Tc |
> 475 |
Nom. |
|
Resistivity |
Ω cm. p |
@ Field Strength |
1×107 |
Typ. |
|
Loss Factor |
1×106Tan δ/ µi |
Initial |
150 |
Typ. |
|
|
MHz |
@ Frequency |
50 |
Typ. |
|
Chart Legend |
|
Σl/A(cm-1): |
le : |
Ae : |
Ve : |
AL : |
|
|
Core Constant |
Effective Path Length |
Effective Cross-Sectional |
Effective Core Volume |
Inductance Factor
|
|
|
28.6 |
2.07 |
0.072 |
0.15 |
18 |
|
Dimensional Tolerances |
|
Case |
In |
Toleranz |
mm |
Toleranz |
Weight |
Gewicht |
|
B (Outer Diameter)/mm |
0.375 |
±0.008 |
9.5 |
±0.20 |
0.83 g |
0.83 gramm |
|
A (Inner Diameter)/mm |
0.187 |
±0.006 |
4.75 |
±0.15 |
--- |
--- |
|
H (Height)/mm |
0.125 |
±0.010 |
3.3 |
-0.25 |
--- |
-- |
|
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 |
|
Die oben genannten Eigenschaften sind typisch für Amidon MnZn- und NiZn-Ferrite.
The above quoted properties are typical for Amidon MnZn and NiZn ferrites. |
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