|
Material Characteristics FT87A-C
|
|
Property
|
Item
|
Unit/
Symbol
|
Permea-bilität
|
Anfangs Perm. (10 kHz), Coated
|
|
|
|
|
|
Initial
Permeability@ B < 10 gauss
|
|
µi
|
900
±25%
|
380
±25%
|
-----
|
----
|
------
|
|
|
Eff. Parameters
|
|
Flux
Density @ Field Strength
|
Gauss
@ 1194 A/m,
15 oe mT
|
B
H
|
4200
420
|
Mittlere
Feld-
Linienlänge
Ae mm²
|
Oberfläche
Le mm
|
Volumen
Ve mm³
|
|
26.2 cm²
|
MA54.1
|
1417 cm³
|
|
WaAC
|
0.39
|
|
|
INDUCTANCE
|
|
AL
value (nH/T²)
|
Test conditions
|
|
538±
25%
|
10 kHz
|
0.5
mT (For N = 5, use 2.82 mA), 25°C
|
|
ELECTRICAL LOSSES
|
|
tan δ/ µi
max
|
tan
δ/ µi Typ
|
Test conditions
|
|
≤
60·10-6
|
≤
30·10-6
|
300
kHz
|
0.5
mT, 25ºC
|
|
≤
300·10-6
|
≤
200·10-6
|
1000
kHz
|
|
Curie
Temperature
|
°C
|
Tc
|
200°C
|
|
|
Resistivity
|
Ohm-cm
|
Ρ
|
10 Ω-m
|
|
TEMPERATURE FACTOR
|
|
αF
|
Test conditions
|
|
2.0·10-66
to -5.0·10-6/°C
|
+20°C to +40°C
|
|
2.0·10-66
to -2.0·10-6/°C
|
+40°C to +70°C
|
|
Electrical Specifications
|
|
Bestellnr.
|
Kern-Material
|
Item
|
Unit/Symbol
|
Condition
|
Value
(nH/T²)
|
AL-Toleranz
|
|
|
FT87A-C
|
Ferrit Toroid
|
AL
|
nH/N²
|
@ 10 KHz
|
538
|
±25%
|
|
MnZnFe
|
10 kHz
|
|
|
Initial
Perm (10 kHz)
|
3.000 ±
20%
|
|
Saturation
Flux Density (4,700 G at 15 Oe, 25°C)
|
470 mT,
11.9 A•T/cm
|
|
Curie
Temperature
|
200°C
|
|
Maximum
Usable Frequency (50% roll-off)
|
≤8
MHz
|
|
Relative
Loss Factor (tan δ/µiac) X10-6, 25°C
|
10@300 kHz
max
|
|
Remanence
(1,500 G, 25°C)
|
150 mT
|
|
Resistivity
|
2 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
|
6.53 Max
|
---
|
--
|
