Features – TDK Ferrites EE320x250x20 User Manual
Page 3
(2/7)
003-02 / 20101108 / e16_1.fm
• All specifications are subject to change without notice.
FEATURES
• Large size ferrite cores developed for reactors and transformers used in high power units.
• Please contact us for machinability of non-standard special forms.
MATERIAL CHARACTERISTICS (Typical)
• 1(mT)=10(G),1(A/m)=0.012566(Oe)
CORE LOSS vs. TEMPERATURE CHARACTERISTICS
Material
PE22
PC40
PE90
Initial permeability
µ
i
[23°C]
1800
2300
2200
Curie temperature
T
c
°C
>200
>200
>250
Saturation magnetic flux density
H=1194A/m
B
s
[23°C]
[100°C]
mT
510
410
500
380
530
430
Remanent flux density
B
r
[23°C]
mT
140
125
170
Coercive force
H
c
[23°C]
A/m
16
15
13
Core loss
25kHz, 200mT
P
cv
[90°C]
kW/m
3
79
64
60
[100°C]
80
70
68
100kHz, 200mT
520
420
400
Electrical resistivity
ρ
Ω • m
3.0
6.5
6.0
Approximate density
d
app
kg/m
3
4.8
Ч10
3
4.8
Ч10
3
4.9
Ч10
3
Thermal expansion coefficient
α
1/K
12
Ч10
–6
12
Ч10
–6
12
Ч10
–6
Thermal conductivity
κ
W/mK
5
5
5
Specific heat
C
p
J/kg • K
600
600
600
Bending strength
δ
b3
N/m
2
9
Ч10
7
9
Ч10
7
9
Ч10
7
Young’s modulus
E
N/m
2
1.2
Ч10
11
1.2
Ч10
11
1.2
Ч10
11
Magnetostriction
λs
–0.6
Ч10
–6
–0.6
Ч10
–6
–0.6
Ч10
–6
150
200
100
50
0
120
100
80
60
40
20
0
Temperature(
˚
C)
P
cv
( kW/m
3
)
PC40
PE90
PE22
25kHz-200mT
900
700
500
300
120
100
80
60
40
20
0
Temperature(
˚
C)
P
cv
( kW/m
3
)
PC40
PE22
PE90
100kHz-200mT