Ferroxcube
EFD cores and accessories
CORES
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
2.50
325
28.5
11.4
10.7
≈
0.9
UNIT
mm
−1
mm
3
mm
mm
2
mm
2
g
3.5
±0.1
0.2
12.5
±
0.3
9
±0.25
5.4
±0.15
handbook, halfpage
EFD12/6/3.5
4.55
6.2
±0.15
±0.1
2
±0.1
CBW268
Dimensions in mm.
Fig.1 EFD12/6/3.5 core half.
Core sets
Clamping force for A
L
measurements, 15
±5
N.
GRADE
3C90
A
L
(nH)
40
±5%
63
±8%
100
±10%
825
±25%
3C94
40
±5%
63
±8%
100
±10%
825
±25%
3C96
3F3
750
±25%
40
±5%
63
±8%
100
±10%
700
±25%
3F35
3F4
550
±25%
40
±5%
63
±8%
100
±10%
380
±25%
3F45
380
±25%
µ
e
≈
80
≈
125
≈
200
≈
1610
≈
80
≈
125
≈
200
≈
1610
≈
1460
≈
80
≈
125
≈
200
≈
1370
≈
1070
≈
80
≈
125
≈
200
≈
730
≈
730
AIR GAP
(µm)
≈
540
≈
290
≈
160
≈
0
≈
540
≈
290
≈
160
≈
0
≈
0
≈
540
≈
290
≈
160
≈
0
≈
0
≈
500
≈
260
≈
130
≈
0
≈
0
TYPE NUMBER
EFD12/6/3.5-3C90-A40-S
EFD12/6/3.5-3C90-A63-S
EFD12/6/3.5-3C90-A100-S
EFD12/6/3.5-3C90-S
EFD12/6/3.5-3C94-A40-S
EFD12/6/3.5-3C94-A63-S
EFD12/6/3.5-3C94-A100-S
EFD12/6/3.5-3C94-S
EFD12/6/3.5-3C96-S
EFD12/6/3.5-3F3-A40-S
EFD12/6/3.5-3F3-A63-S
EFD12/6/3.5-3F3-A100-S
EFD12/6/3.5-3F3-S
EFD12/6/3.5-3F35-S
EFD12/6/3.5-3F4-A40-S
EFD12/6/3.5-3F4-A63-S
EFD12/6/3.5-3F4-A100-S
EFD12/6/3.5-3F4-S
EFD12/6/3.5-3F45-S
2008 Sep 01
630
Ferroxcube
EFD cores and accessories
Properties of core sets under power conditions
B (mT) at
GRADE
H = 250 A/m;
f = 25 kHz;
T = 100
°C
≥320
≥320
≥340
≥300
≥315
≥250
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
≤
0.036
≤
0.029
≤
0.022
−
≤
0.04
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 200 mT;
T = 100
°C
−
≤
0.2
≤
0.15
−
−
−
f = 400 kHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
≤
0.06
≤
0.03
≤
0.065
−
EFD12/6/3.5
f = 500 kHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
≤
0.12
≤
0.045
−
−
3C90
3C94
3C96
3F35
3F3
3F4
Properties of core sets under power conditions (continued)
B (mT) at
GRADE
H = 250 A/m;
f = 25 kHz;
T = 100
°C
≥320
≥320
≥340
≥300
≥315
≥250
≥250
f = 500 kHz;
ˆ
B = 100 mT;
T = 100
°C
−
−
−
≤
0.35
−
−
−
CORE LOSS (W) at
f = 1 MHz;
ˆ
B = 30 mT;
T = 100
°C
−
−
−
−
−
≤
0.095
≤
0.075
f = 1 MHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
−
−
−
−
≤
0.28
f = 3 MHz;
ˆ
B = 10 mT;
T = 100
°C
−
−
−
−
−
≤
0.15
≤
0.12
3C90
3C94
3C96
3F35
3F3
3F4
3F45
2008 Sep 01
631
Ferroxcube
EFD cores and accessories
COIL FORMERS
General data
ITEM
Coil former material
Solder pad material
Maximum operating temperature
Resistance to soldering heat
Solderability
SPECIFICATION
EFD12/6/3.5
liquid crystal polymer (LCP), glass reinforced, flame retardant in accordance with
“UL 94V-0”
; UL file number E83005(M)
copper-tin alloy (CuSn), tin (Sn) plated
155
°C,
“IEC 60085”,
class F
“IEC 60068-2-20”
, Part 2, Test Tb, method 1B, 350
°C,
3.5 s
“IEC 60068-2-20”,
Part 2, Test Ta, method 1: 235
°C,
2 s
handbook, full pagewidth
1.8
0
8.65 0.15
0
6.55
0.1
5.7
±
0.05
0
6.2
0.1
max
0
8.7 0.15
(7.65 min)
2.8
0.1
2.2 0
3.1
0.3
12.5
0.8
3
9
13.7 max
0.3
1.8
13.4
0
16 0.3
2
±
0.2
3
Dimensions in mm.
MGC341
Fig.2 EFD12/6/3.5 coil former (SMD); 8-solder pads.
Winding data and area product for EFD12/6/3.5 coil former (SMD) with 8-solder pads
NUMBER
OF
SECTIONS
1
NUMBER
OF SOLDER
PADS
8
MINIMUM
WINDING
AREA
(mm
2
)
6.5
MINIMUM
WINDING
WIDTH
(mm)
7.65
AVERAGE
LENGTH OF
TURN
(mm)
18.6
AREA
PRODUCT
Ae x Aw
(mm
4
)
74.1
TYPE NUMBER
CPHS-EFD12-1S-8P-Z
2008 Sep 01
632
Ferroxcube
EFD cores and accessories
MOUNTING PARTS
General data
ITEM
Clamp
REMARKS
stainless steel (CrNi); clamping force
≈20
N
FIGURE
3
EFD12/6/3.5
TYPE NUMBER
CLM-EFD12
14
−0.3
10.5
12.5
±0.2
9.4
handbook, full pagewidth
2.5
12
−0.3
4
11.5
CBW496
Dimensions in mm.
Fig.3 EFD12/6/3.5 mounting clamp.
2008 Sep 01
633
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