FERROXCUBE
DATA SHEET
EFD20/10/7
EFD cores and accessories
Supersedes data of September 2004
2008 Sep 01
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
1.52
1460
47.0
31.0
29
≈
3.5
UNIT
mm
−1
mm
3
mm
mm
2
mm
2
g
20 0.55
15.4 0.5
8.9
0.2
6.65 0.17
0.15
handbook, halfpage
EFD20/10/7
10
0.15
7.7
0.25
3.6
0.15
MGC345
Dimensions in mm.
Fig.1 EFD20/10/7 core half.
Core halves
A
L
measured in combination with a non-gapped core half, clamping force for A
L
measurements 20
±10
N, unless stated
otherwise.
GRADE
3C90
A
L
(nH)
63
±3%
(1)
100
±3%
160
±5%
250
±8%
315
±10%
1300
±25%
3C94
63
±3%
(1)
100
±3%
160
±5%
250
±8%
315
±10%
1300
±25%
3C95
3C96
3F3
1540
±25%
1200
±25%
63
±3%
(1)
100
±3%
160
±5%
250
±8%
315
±10%
1200
±25%
2008 Sep 01
µ
e
≈
76
≈
121
≈
193
≈
302
≈
380
≈
1570
≈
76
≈
121
≈
193
≈
302
≈
380
≈
1570
≈
1865
≈
1450
≈
76
≈
121
≈
193
≈
302
≈
380
≈
1450
2
TOTAL AIR GAP
(µm)
≈
960
≈
510
≈
280
≈
160
≈
120
≈
0
≈
960
≈
510
≈
280
≈
160
≈
120
≈
0
≈
0
≈
0
≈
960
≈
510
≈
280
≈
160
≈
120
≈
0
TYPE NUMBER
EFD20/10/7-3C90-E63
EFD20/10/7-3C90-A100
EFD20/10/7-3C90-A160
EFD20/10/7-3C90-A250
EFD20/10/7-3C90-A315
EFD20/10/7-3C90
EFD20/10/7-3C94-E63
EFD20/10/7-3C94-A100
EFD20/10/7-3C94-A160
EFD20/10/7-3C94-A250
EFD20/10/7-3C94-A315
EFD20/10/7-3C94
EFD20/10/7-3C95
EFD20/10/7-3C96
EFD20/10/7-3F3-E63
EFD20/10/7-3F3-A100
EFD20/10/7-3F3-A160
EFD20/10/7-3F3-A250
EFD20/10/7-3F3-A315
EFD20/10/7-3F3
Ferroxcube
EFD cores and accessories
EFD20/10/7
GRADE
3F35
3F4
A
L
(nH)
920
±25%
63
±3%
(1)
100
±3%
160
±5%
250
±8%
315
±10%
650
±25%
µ
e
≈
1110
≈
76
≈
121
≈
193
≈
302
≈
380
≈
780
≈
780
TOTAL AIR GAP
(µm)
≈
0
≈
900
≈
450
≈
230
≈
120
≈
80
≈
0
≈
0
TYPE NUMBER
EFD20/10/7-3F35
EFD20/10/7-3F4-E63
EFD20/10/7-3F4-A100
EFD20/10/7-3F4-A160
EFD20/10/7-3F4-A250
EFD20/10/7-3F4-A315
EFD20/10/7-3F4
EFD20/10/7-3F45
3F45
Note
650
±25%
1. Measured in combination with an equal gapped core half, clamping force for A
L
measurements, 20
±10
N.
Properties of core sets under power conditions
B (mT) at
GRADE
H = 250 A/m;f =
25 kHz;
T = 100
°C
≥330
≥330
≥330
≥330
≥300
≥315
≥300
f = 25 kHz;
ˆ
= 200 mT;
B
T = 100
°C
≤
0.16
−
−
−
−
−
−
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
≤
0.17
≤
0.13
−
≤
0.1
−
≤
0.17
−
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 200 mT;
T = 25
°C
−
−
≤
0.86
−
−
−
−
f = 100 kHz;
ˆ
B = 200 mT;
T = 100
°C
−
≤
0.8
≤
0.82
≤
0.6
−
−
−
f = 400 kHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
−
≤
0.26
≤
0.13
≤
0.28
−
3C90
3C94
3C95
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
≥330
≥330
≥330
≥330
≥300
≥315
≥300
≥300
f = 500 kHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
−
≤
0.5
≤
0.2
−
−
−
f = 500 kHz;
ˆ
B = 100 mT;
T = 100
°C
−
−
−
−
≤
1.5
−
−
−
CORE LOSS (W) at
f = 1 MHz;
ˆ
B = 30 mT;
T = 100
°C
−
−
−
−
−
−
≤
0.43
≤
0.34
f = 1 MHz;
ˆ
B = 50 mT;
T = 100
°C
−
−
−
−
−
−
−
≤
1.25
f = 3 MHz;
ˆ
B = 10 mT;
T = 100
°C
−
−
−
−
−
−
≤
0.7
≤
0.55
3C90
3C94
3C95
3C96
3F35
3F3
3F4
3F45
2008 Sep 01
3
Ferroxcube
EFD cores and accessories
COIL FORMERS
General data
PARAMETER
Coil former material
Pin material
Maximum operating temperature
Resistance to soldering heat
Solderability
SPECIFICATION
EFD20/10/7
phenolformaldehyde (PF), glass-reinforced, flame retardant in accordance with
“UL94 V-0”
; UL file number E167521(M)
copper-tin alloy (CuSn), Ni flash, tin (Sn) plated, see note 1
180
°C,
“IEC 60085”,
class H
“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
14.8 max
10.6
0
−0.15
9.23
+0.15
0
14.8 0
−0.2
13.2 min
5
10 max
9.5 max
3.93
+0.1
5.3 0
0
−0.1
5.2
±0.3
1.6
5
±0.1
15
±0.1
20.2 max.
17.5
14.1
±0.1
∅
0.6
17.5
±0.1
21.2 max.
1.3
+0.15
0
CBW087
Dimensions in mm.
Fig.2 EFD20/10/7 coil former; 8-pins.
Winding data and area product for EFD20 coil former with 8-pins
NUMBER OF
SECTIONS
1
Note
1. Also available with post-inserted pins.
WINDING
AREA
(mm
2
)
26.4
MINIMUM
WINDING
WIDTH
(mm)
13.2
AVERAGE
LENGTH OF
TURN
(mm)
36.5
AREA
PRODUCT
Ae x Aw
(mm
4
)
818
TYPE NUMBER
CSH-EFD20-1S-8P
(1)
2008 Sep 01
4
Ferroxcube
EFD cores and accessories
COIL FORMERS
General data
PARAMETER
Coil former material
Pin material
Maximum operating temperature
Resistance to soldering heat
Solderability
SPECIFICATION
EFD20/10/7
liquid crystal polymer (LCP), glass reinforced, flame retardant in accordance with
“UL94 V-0”;
UL file number E54705 (M)
copper-tin alloy (CuSn), Ni flash, 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
14.8 0
−0.2
10.3 0
−0.15
9.2
+0.1
0
3.75
14.8 0
−0.2
13.5 min.
0.5
0
3.9
+0.1
5
−0.1
0
3.8
±0.3
17.5
19.5
23.5
±0.2
1
+0.15
0
CBW269
9.5 0
−0.2
0.4
17.5
0.3
7.5
±0.1
15
±0.1
21.5
±0.2
Dimensions in mm.
1.35 min.
0.7 0
−0.1
Fig.3 EFD20/10/7 coil former (PCB); 10-pins.
Winding data and area product for EFD20/10/7 coil former (PCB) with 10-pins
NUMBER OF
SECTIONS
1
WINDING
AREA
(mm
2
)
27.7
MINIMUM
WINDING
WIDTH
(mm)
13.5
AVERAGE
LENGTH OF
TURN
(mm)
34.1
AREA
PRODUCT
Ae x Aw
(mm
4
)
859
TYPE NUMBER
CPH-EFD20-1S-10PD-Z
2008 Sep 01
5
Test/Measurement
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