EFD 30/15/9
Core
I
E core with flattened, lower center leg
B66423
for especially flat transformer design
I
For DC/DC converters
I
EFD cores are supplied as single units
Magnetic characteristics
(per set)
危
l/A
l
e
A
e
A
min
V
e
= 0,99 mm
鈥?
= 68 mm
= 69 mm
2
= 69 mm
2
= 4 690 mm
3
Approx. weight
24 g/set
Ungapped
Material
N87
A
L
value
nH
碌
e
A
L1min
P
V
nH
W/set
Ordering code
2050 + 30/鈥?20 % 1610 1280
B66423-G-X187
< 2,60
(200 mT, 100 kHz, 100 擄C)
Gapped
Material
N87
A
L
value
nH
160
鹵
10 %
250
鹵
10 %
315
鹵
10 %
碌
e
125
196
246
g
approx. mm
0,71
0,38
0,27
Ordering code
B66423-U160-K187
B66423-U250-K187
B66423-U315-K187
The
A
L
value in the table applies to a core set comprising one ungapped core (dimension
g
= 0) and
one gapped core (dimension
g
> 0).
Calculation factors
(for formulas, see
鈥淓 cores: general information鈥?
page 382)
Material
Relationship between
air gap 鈥?/div>
A
L
value
K1
(25 擄C)
N87
Validity range:
125
K2
(25 擄C)
鈥?0,712
Calculation of saturation current
K3
(25 擄C)
176
K4
(25 擄C)
鈥?0,796
K3
(100 擄C)
K4
(100 擄C)
161
鈥?0,873
K1, K2:
0,10 mm <
s
< 2,00 mm
K3, K4:
70 nH <
A
L
< 630 nH
514
08/01
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2
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