Ferroxcube
E cores and accessories
E55/28/25
CORE SETS
Effective core parameters
SYMBOL
PARAMETER
Σ(I/A)
core factor (C1)
Ve
effective volume
Ie
effective length
Ae
effective area
Amin
minimum area
m
mass of core half
VALUE UNIT
0.239 mm−1
52000 mm3
123
mm
420
mm2
411
mm2
≈130 g
andbook, halfpage
R < 0.6
56.2
0
−2.1
37.5
+1.5
0
17.2
0
−0.5
18.5
+0.8
0
27.5
±0.3
R3
25
0
−0.8
CBW069
Dimensions in mm.
Fig.1 E55/28/25 core half.
Core halves
AL measured in combination with a non-gapped core half, clamping force for AL measurements 60 ±20 N, unless stated
otherwise.
GRADE
3C90
3C92
3C94
3C95
3F3
AL
(nH)
100 ±5%(1)
160 ±5%(1)
250 ±5%(1)
315 ±5%(1)
400 ±8%(1)
630 ±10%(1)
8000 ±25%
5800 ±25%
8000 ±25%
9860 ±25%
100 ±5%(1)
160 ±5%(1)
250 ±5%(1)
315 ±5%(1)
400 ±8%(1)
630 ±10%(1)
7400 ±25%
µe
≈ 23
≈ 37
≈ 58
≈ 73
≈ 93
≈ 147
≈ 1860
≈ 1100
≈ 1860
≈ 2300
≈ 23
≈ 37
≈ 58
≈ 73
≈ 93
≈ 147
≈ 1730
TOTAL AIR GAP
(µm)
≈ 10440
≈ 5520
≈ 3040
≈ 2240
≈ 1660
≈ 940
≈0
≈0
≈0
≈0
≈ 10440
≈ 5520
≈ 3040
≈ 2240
≈ 1660
≈ 940
≈0
TYPE NUMBER
E55/28/25-3C90-E100
E55/28/25-3C90-E160
E55/28/25-3C90-E250
E55/28/25-3C90-E315
E55/28/25-3C90-E400
E55/28/25-3C90-E630
E55/28/25-3C90
E55/28/25-3C92
E55/28/25-3C94
E55/28/25-3C95
E55/28/25-3F3-E100
E55/28/25-3F3-E160
E55/28/25-3F3-E250
E55/28/25-3F3-E315
E55/28/25-3F3-E400
E55/28/25-3F3-E630
E55/28/25-3F3
Note
1. Measured in combination with an equal gapped core half.
2008 Sep 01
2