Ferroxcube
Material specification
3E25 SPECIFICATIONS
A medium permeability material mainly for use in
current compensated chokes in EMI-suppression
filters.
SYMBOL
µ
i
B
CONDITIONS
25
°C; ≤10
kHz;
0.25 mT
25
°C;
10 kHz;
1200 A/m
100
°C;
10 kHz;
1200 A/m
tanδ/µ
i
25
°C;
100 kHz;
0.25 mT
25
°C;
300 kHz;
0.25 mT
ρ
T
C
density
DC; 25
°C
VALUE
6000
±
20%
≈
390
≈
220
≤
25
×
10
−6
≤
200
×
10
−6
≈
0.5
≥
125
≈
4900
Ωm
°C
kg/m
3
Fig.1
Complex permeability as
a function of frequency.
10
10
2
2
3E25
handbook, halfpage
10
5
MBW026
3E25
UNIT
µ'
s ,
µ''
s
10
4
µ'
s
mT
10
3
µ''
s
10
1
1
f (MHz)
10
handbook, halfpage
20000
µ
i
MBW029
MBW011
3E25
handbook, halfpage
500
B
(mT)
400
25oC
100oC
3E25
15000
300
10000
200
5000
100
0
−50
0
50
150
T (
o
C)
250
25
0
25
50
150
H (A/m)
250
Fig.2
Initial permeability as a
function of temperature.
Fig.3 Typical B-H loops.
2008 Sep 01
137
Ferroxcube
Material specification
3E25
handbook, halfpage
10
4
MBW040
3E25
handbook, halfpage
16000
µ
p
MBW082
f = 10 kHz
T=25
o
C
3E25
µ
rev
12000
10
3
8000
5
µs
2 µs
10
2
4000
0.5
µs
1
µs
10
1
10
10
2
H (A/m) 10
3
0
0
100
200
300
B (mT)
400
Fig.4
Reversible permeability as a
function of magnetic field strength.
Fig.5 Pulse characteristics (unipolar pulses).
2008 Sep 01
138
Ferroxcube
Material specification
DATA SHEET STATUS DEFINITIONS
DATA SHEET
STATUS
Preliminary
specification
Product specification
PRODUCT
STATUS
Development
DEFINITIONS
3E25
This data sheet contains preliminary data. Ferroxcube reserves the right to
make changes at any time without notice in order to improve design and
supply the best possible product.
This data sheet contains final specifications. Ferroxcube reserves the right
to make changes at any time without notice in order to improve design and
supply the best possible product.
Production
DISCLAIMER
Life support applications
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube
for any damages resulting from such application.
PRODUCT STATUS DEFINITIONS
STATUS
Prototype
Design-in
Preferred
Support
INDICATION
DEFINITION
These are products that have been made as development samples for the purposes of
technical evaluation only. The data for these types is provisional and is subject to
change.
These products are recommended for new designs.
These products are recommended for use in current designs and are available via our
sales channels.
These products are
not
recommended for new designs and may not be available
through all of our sales channels. Customers are advised to check for availability.
2008 Sep 01
139
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