Ferroxcube
E cores and accessories
CORE SETS
Effective core parameters
SYMBOL
Σ(I/A)
V
e
I
e
A
e
A
min
m
PARAMETER
core factor (C1)
effective volume
effective length
effective area
minimum area
mass of core half
VALUE
0.380
20800
88.9
234
226
≈
53
UNIT
mm
−1
mm
3
mm
mm
2
mm
2
g
handbook, halfpage
E47/20/16
46.9
±0.8
32.4
±0.65
15.6
±0.25
12.1
min. 19.6
±0.2
15.6
±0.25
Dimensions in mm.
CBW059
Fig.1 E47/20/16 core half.
Core halves
A
L
measured in combination with a non-gapped core half, clamping force for A
L
measurements 40
±20
N, unless stated
otherwise.
GRADE
3C81
A
L
(nH)
100
±5%
(1)
160
±5%
(1)
250
±5%
(1)
315
±5%
(1)
400
±8%
(1)
630
±10%
7540
±25%
3C90
100
±5%
(1)
160
±5%
(1)
250
±5%
(1)
315
±5%
(1)
400
±8%
(1)
630
±10%
5500
±25%
3C91
3C92
3C94
3C95
7540
±25%
4400
±25%
5600
±25%
7540
±25%
µ
e
≈
30
≈
48
≈
76
≈
95
≈
121
≈
190
≈
2280
≈
30
≈
48
≈
76
≈
95
≈
121
≈
190
≈
1660
≈
2280
≈
1330
≈
1690
≈
2280
TOTAL AIR GAP
(µm)
≈
5080
≈
2720
≈
1540
≈
1140
≈
860
≈
490
≈
0
≈
5080
≈
2720
≈
1540
≈
1140
≈
860
≈
490
≈
0
≈
0
≈
0
≈
0
≈
0
TYPE NUMBER
E47/20/16-3C81-E100
E47/20/16-3C81-E160
E47/20/16-3C81-E250
E47/20/16-3C81-E315
E47/20/16-3C81-E400
E47/20/16-3C81-A630
E47/20/16-3C81
E47/20/16-3C90-E100
E47/20/16-3C90-E160
E47/20/16-3C90-E250
E47/20/16-3C90-E315
E47/20/16-3C90-E400
E47/20/16-3C90-A630
E47/20/16-3C90
E47/20/16-3C91
E47/20/16-3C92
E47/20/16-3C94
E47/20/16-3C95
2008 Sep 01
425
FERROXCUBE [ FERROXCUBE INTERNATIONAL HOLDING B.V. ]
