|
A-75 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 |
5000 |
-- |
0.001-1 |
0.15-12 |
1.0-20 |
|
Flux Density @ Field Strength |
Gauss
Oersted |
B
H |
4300
@ 1194 A/m, 15 oe mT |
Mittlere Feld-
Linienlänge
|
Oberfläche
|
Volumen
|
|
Residual Flux Density |
Gauss |
Br |
1400 |
31.7 cm |
14 cm² |
451 cm² |
|
Coercive Force |
Oersted |
|
0.16 |
Sättigungsflußdichte
10 Oe (Gauß)
2500 |
Vol.Widerstand Ω/cm
10² |
|
Loss Factor @ Frequency |
10 -6
MHz |
Tan δ/ µi |
15
0.1 |
Remanenzflußdichte
10 Oe (Gauß)
1400 |
Σl/A(cm-1)
22.9 |
|
tan δ/ μi |
≤12·10-6 |
Test conditions |
100 kHz, 0.5 mT, 25°C |
|
Temperature Coefficient of Initial Permeability (20 -70°C) |
%/°C |
|
0.6 |
Density gm/cm3
≈4.7 g/cm3 |
|
Curie Temperature |
°C |
Tc |
>140 |
|
Resistivity |
Ohm-cm |
Ρ
300
|
|
|
Electrical Specifications |
|
Bestellnr. |
Kern-Material |
Item |
Unit/Symbol |
Condition |
Value
(nH/T²)
|
AL-Toleranz |
|
|
FT50A-75 |
Ferrit Toroid |
AL |
nH/N² |
@ 10 KHz |
3000
10 kHz |
±20% |
|
MnZn |
≥0.9 x AL
@ 10 kHz |
200 kHz |
|
Test conditions: 0.5 mT (For N = 1 use 1.49 mA), 25°C |
|
Relative Loss Factor |
10 -6 |
Tan δ/ µi |
˂20 |
|
|
kHz |
@frenquency |
100 |
|
Max. Usable freq. |
MHz |
50% roll-off |
˂1 |
|
Remanence |
G, mT |
Typical |
1000, 100 |
|
Disaccommodation Factor |
10 -6 |
Typical |
˂3 |
|
Power Loss (PL), Sine Wave, in mW/cm³ (typical) |
|
Condition |
|
25°C |
|
@60°C |
|
@100°C |
@120°C |
|
I |
25 kHz |
N/A |
200 mT |
N/A |
2000 G |
N/A |
N/A |
|
II |
100 kHz |
N/A |
100 mT |
N/A |
1000 G |
N/A |
N/A |
|
III |
500 kHz |
N/A |
50 mT |
N/A |
500 G |
N/A |
N/A |
|
IV |
700 kHz |
N/A |
50 mT |
N/A |
500 G |
N/A |
N/A |
|
|
Le |
cm |
N/A |
3.12 |
±10% |
|
Ae |
cm² |
N/A |
0.15 |
±10% |
|
Ve |
cm³ |
N/A |
0.47 |
±10% |
|
WaAc |
N/A |
N/A |
0.07 |
|
|
Initial Permeability |
µ0 |
@ B < 10 gauss |
5000 |
±25% |
|
Temp. Coeff. Of initial
Permeability |
% °C |
20-70°C |
0.6 |
Typ. |
|
Coercive Force |
Hc |
oersted |
0.16 |
Typ. |
|
Residual Flux Density |
Gauss, Br |
N/A |
1400 |
Typ. |
|
Flux Density |
Gauss, B |
Initial (B), oersted |
4300 |
Typ. |
|
|
Gauss, H @ |
@ Field Strength (H), oersted |
5 |
Typ. |
|
Curie temperature |
°C |
Tc |
> 140 |
Nom. |
|
Resistivity |
Ω cm. p |
@ Field Strength |
10² |
Typ. |
|
Loss Factor |
Tan δ/ µi |
Initial |
15 |
Typ. |
|
|
MHz |
@ Frequency |
0.1 |
Typ. |
|
Chart Legend |
|
Σl/A(cm-1): |
le : |
Ae : |
Ve : |
AL : |
WaAc |
|
Core Constant |
Effective Path Length |
Effective Cross-Sectional |
Effective Core Volume |
Inductance Factor
|
0.07 |
|
20.8 |
3.12 |
0.15 |
0.47 |
3000 |
|
Dimensional Tolerances |
|
Case |
In |
Toleranz |
mm |
Toleranz |
Weight |
Gewicht |
|
B (Outer Diameter)/mm |
0.500 |
0.510 Max |
12.7 |
12.96 Max |
2.40 g |
2.40 g |
|
A (Inner Diameter)/mm |
0.311 |
0.312 Min |
7.92 |
7.67 Min |
--- |
--- |
|
H (Height)/mm |
0.250 |
0.257 Max |
6.35 |
6.53 Max |
--- |
-- |
|
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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