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B66421 Datasheet

  • B66421

  • EFD 25/13/9

  • 4頁

  • EPCOS   EPCOS

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EFD 25/13/9
Core
I
E core with flattened, lower center leg
B66421
for especially flat transformer design
I
For DC/DC converters
I
EFD cores are supplied as single units
Magnetic characteristics
(per set)
l/A
l
e
A
e
A
min
V
e
= 0,98 mm
鈥?
= 57 mm
= 58 mm
2
= 57 mm
2
= 3 310 mm
3
Approx. weight
16,6 g/set
Ungapped
Material
N87
A
L
value
nH
e
A
L1min
P
V
nH
W/set
Ordering code
2000 + 30/鈥?20 % 1560 1280
B66421-G-X187
< 1,80
(200 mT, 100 kHz, 100 擄C)
Gapped
Material
N87
A
L
value
nH
160
10 %
250
10 %
315
10 %
e
125
195
246
g
approx. mm
0,55
0,30
0,22
Ordering code
B66421-U160-K187
B66421-U250-K187
B66421-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:
103
K2
(25 擄C)
鈥?0,734
Calculation of saturation current
K3
(25 擄C)
154
K4
(25 擄C)
鈥?0,796
K3
(100 擄C)
K4
(100 擄C)
138
鈥?0,873
K1, K2:
0,10 mm <
s
< 1,40 mm
K3, K4:
50 nH <
A
L
< 410 nH
512
08/01

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