FERROXCUBE
DATA SHEET
EC70
EC cores and accessories
Supersedes data of February 2002
2004 Sep 01
Ferroxcube
EC 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
0.514
40100
144
279
211
≈
127
UNIT
mm
−1
mm
3
mm
mm
2
mm
2
g
16.4
0.4
MGC407
EC70
handbook, halfpage
22.75
0.45
34.5
0.15
71.7 max
44.5 1.2
16.4 0.4
Dimensions in mm.
Fig.1 EC70 core half.
Core halves
A
L
measured in combination with an non-gapped core half, unless stated otherwise.
GRADE
3C81
A
L
(nH)
250
±
3%
(1)
315
±
3%
(1)
400
±
3%
(1)
630
±
5%
1000
±
10%
≥
4000
3C90
250
±
3%
(1)
315
±
3%
(1)
400
±
3%
(1)
630
±
5%
1000
±
10%
3900
±
25%
Note
1. Measured in combination with an equal gapped core half (symmetrical air gap).
Properties of core sets under power conditions
B (mT) at
GRADE
H = 250 A/m;
f = 25 kHz;
T = 100
°C
≥330
≥330
2
f = 25 kHz;
ˆ
= 200 mT;
B
T = 100
°C
≤
8.2
≤
4.9
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
−
≤
5.1
µ
e
≈
102
≈
130
≈
165
≈
256
≈
406
≥
1620
≈
102
≈
130
≈
165
≈
256
≈
406
≈
1580
AIR GAP
(µm)
≈
1830
≈
1370
≈
1020
≈
580
≈
320
≈
0
≈
1830
≈
1370
≈
1020
≈
580
≈
320
≈
0
TYPE NUMBER
EC70-3C81-E250
EC70-3C81-E315
EC70-3C81-E400
EC70-3C81-A630
EC70-3C81-A1000
EC70-3C81
EC70-3C90-E250
EC70-3C90-E315
EC70-3C90-E400
EC70-3C90-A630
EC70-3C90-A1000
EC70-3C90
3C81
3C90
2004 Sep 01
Ferroxcube
EC cores and accessories
COIL FORMERS
General data 8-slots EC70 coil former for insertable pins
PARAMETER
Coil former material
Maximum operating temperature
SPECIFICATION
polyamide (PA6.6), glass-reinforced, flame retardant
in accordance with
“UL 94V-0”
; UL file number E44716(M)
130
°C,
“IEC 60085”,
class B
EC70
51.4
±0.25
3.81
17.15
6
50.8
±0.64
41.45
±0.25
19.5
±0.13
42.45
±0.25
17.15
±0.15
4.5
56.5
±0.25
10.16
30.48
50.8
44.15
±0.64
56.5
±0.25
MFW050
Dimensions in mm.
Fig.2 EC70 coil former; 8-slots.
Winding data 8-slots EC70 coil former for insertable pins;
see note 1
NUMBER OF
SECTIONS
1
Note
1. Coil formers with inserted pins are available on request.
MINIMUM
WINDING
AREA
(mm
2
)
465
NOMINAL
WINDING
WIDTH
(mm)
41.5
AVERAGE
LENGTH OF
TURN
(mm)
97.3
TYPE NUMBER
CP-EC70-1S
2004 Sep 01
3
Ferroxcube
EC cores and accessories
MOUNTING PARTS
General data and ordering information
ITEM
Insertable pins
REMARKS
MOUNT
FIGURE
3
4
5
EC70
TYPE NUMBER
PIN-EC
PIN/H-EC
PIN/V-EC70
solderability:
“IEC 68-2-20”,
Part 2,
general
Test Ta, method 1
horizontal
material: copper-zinc alloy (CuZn),
vertical
tin-lead alloy (SnPb) plated, transition
to lead-free (Sn) ongoing.
copper-zinc alloy (CuZn)
Clamp
6
7
CLM/U-EC70
BPL4-EC70
Base plate 4 holes aluminium
handbook, halfpage
15.8
handbook, halfpage
15.75
3.15
1.6 2.35
3.1 1.5
1.5 2.35
0.6
MGB545
0.25
MGB546
0.5
Dimensions in mm.
Dimensions in mm.
Fig.3 EC pin; general mount.
Fig.4 EC pin; horizontal mount.
handbook, halfpage
handbook, halfpage
22.9
12.7
2.85
1.6 3.1
78.7
Ø 2.9
0.5
MGB549
12.7
min
6-32 NC 2A
THD 2 PLACES
65.4
MGB539
Dimensions in mm.
Dimensions in mm.
Fig.5 EC70 pin; vertical mount.
2004 Sep 01
4
Fig.6 EC70 clamp.
Ferroxcube
EC cores and accessories
EC70
handbook, halfpage
95.3
82.6
64.7
3.7
15.9
3.7
7.5
1
MGB544
Dimensions in mm.
Fig.7 EC70 base plate; 4-holes.
2004 Sep 01
5
