Ferroxcube
Material specification
4A11 SPECIFICATIONS
Medium permeability NiZn ferrite for use in wideband
EMI-suppression (30 - 1000 MHz) as well as RF
wideband and balun transformers.
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
25
°C;
1 MHz;
0.25 mT
25
°C;
3 MHz;
0.25 mT
DC; 25
°C
VALUE
850
±20%
≈
340
≈
230
≤
100
×
10
−6
≤
1000
×
10
−6
≈
≥
125
≈
5100
10
5
Ωm
°C
kg/m
3
10
10
1
1
10
f (MHz)
4A11
10
4
µ'
s ,
µ''
s
10
3
µ'
s
MBW309
4A11
UNIT
mT
µ''
s
10
2
tanδ/µ
i
ρ
T
C
density
10
2
Fig.1
Complex permeability as
a function of frequency.
2000
µ
i
1500
MBW310
MBW311
handbook, halfpage
500
4A11
B
(mT)
400
25 oC
100 oC
4A11
300
1000
200
500
100
0
50
0
50
150
T (
o
C)
250
50
0
50
100
500
1000
H (A/m)
Fig.2
Initial permeability as a
function of temperature.
Fig.3 Typical B-H loops.
2008 Sep 01
220