MATERIAL W (Permeabilität 10.000)
W-Material ist ein Material mit hoher Permeabilität, das für EMI / RMI-Unterdrückung, Gleichtaktdrosseln, Impuls- und Breitbandtransformatoren verwendet wird. Verfügbar in Formen und Toroiden.
W-material is a high permeability material used for EMI/RMI suppression, common mode chokes, pulse and broadband transformers. Available in shapes and toroids.
|
Material Characteristics FT87A-W |
|
Property |
Item |
Unit/
Symbol |
Anfangs-
Permeabilität |
Max Permeabilität |
Freq. MHz
Resonanz |
Freq. MHz
Breitband |
Freq.
MHz
Drossel |
|
|
Initial Permeability@ B < 10 gauss |
|
µi |
10.000
±30% |
20.000 |
1 KHz -
250 KHz |
1 KHz-
1 MHz |
100 KHz-
1 MHz |
|
|
Eff. Parameters |
|
Flux Density @ Field Strength |
Gauss
@ 1194 A/m, 15 oe mT |
B
H |
3900
390
|
Mittlere Feld-
Linienlänge
Ae mm² |
Oberfläche
Le mm
|
Volumen
Ve mm³ |
|
26.2 cm² |
54.1 |
1417 cm³ |
|
WaAC |
0.39 |
|
|
INDUCTANCE |
|
AL value (nH/T²) |
Test conditions |
|
6040 ± 30% |
10 kHz |
0.5 mT (For N = 5, use 0.251 mA), 25°C |
|
ELECTRICAL LOSSES |
|
tan δ/ µi |
Production lot limit Average
|
Test conditions |
|
≤3.5·10¯⁶ |
≤3·10¯⁶ |
10 kHz |
0.5 mT, 25ºC |
|
≤55·10¯⁶ |
≤45·10¯⁶ |
100 kHz |
|
Curie Temperature |
°C |
Tc |
210°C |
|
|
Resistivity |
Ohm-cm |
Ρ
|
|
|
Electrical Specifications |
|
Bestellnr. |
Kern-Material |
Item |
Unit/Symbol |
Condition |
Value
(nH/T²)
|
AL-Toleranz |
|
|
FT87A-W |
Ferrit Toroid |
AL |
nH/N² |
@ 10 KHz |
6040
|
±30% |
|
MnZnFe |
10 kHz |
|
|
Initial Perm (10 kHz) |
10.000 ± 30% |
|
Saturation Flux Density (3.900 G at 15 Oe, 25°C) |
390 mT, 11.9 A•T/cm |
|
Curie Temperature |
135°C |
|
Maximum Usable Frequency (50% roll-off) |
≤0.5 MHz |
|
Remanence (800 G, 25°C) |
80mT |
|
Resistivity |
0.1 Ω-m |
|
Density |
4.9 g/cm3 |
|
Dimensional Tolerances |
|
Case |
In |
Toleranz |
mm |
Toleranz |
Weight |
Gewicht |
|
B (Outer Diameter)/mm |
--- |
----- |
22.1 |
22.48 Max |
13.50 |
13.50 |
|
A (Inner Diameter)/mm |
--- |
----- |
13.7 |
14.07 Min |
--- |
--- |
|
H (Height)/mm |
---- |
---- |
6.35 |
6.63 Max |
--- |
-- |
Das - W Material hat Industriestandard für Materialien mit hoher Permeabilität gesetzt.
In Filteranwendungen hat das Material 98 zu 20% - 50 % mehr Impedanz unter 1 MHz als J perm.