B66421 Epcos, B66421 Datasheet

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B66421

Manufacturer Part Number
B66421
Description
EFD 25/13/9 Core
Manufacturer
Epcos
Datasheet
I
I
I
Magnetic characteristics (per set)
l
A
A
V
Approx. weight 16,6 g/set
Ungapped
Material
N87
Gapped
Material
N87
The A
one gapped core (dimension g > 0).
Calculation factors (for formulas, see “E cores: general information”, page 382)
Material
N87
Validity range:
e
l/A = 0,98 mm
e
min
e
EFD 25/13/9
Core
E core with flattened, lower center leg
for especially flat transformer design
For DC/DC converters
EFD cores are supplied as single units
= 57 mm
= 58 mm
= 57 mm
= 3 310 mm
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
A
nH
2000 + 30/– 20 % 1560 1280
A
nH
160
250
315
L
L
value
value
2
2
Relationship between
air gap – A
K1 (25 °C)
103
–1
10 %
10 %
10 %
3
K1, K2: 0,10 mm < s < 1,40 mm
K3, K4: 50 nH < A
L
value
K2 (25 °C)
– 0,734
125
195
246
e
e
A
nH
L
L1min
< 410 nH
Calculation of saturation current
K3 (25 °C)
154
P
W/set
< 1,80
(200 mT, 100 kHz, 100 °C)
V
512
g
approx. mm
0,55
0,30
0,22
08/01
K4 (25 °C)
– 0,796
K3 (100 °C) K4 (100 °C)
138
Ordering code
B66421-G-X187
Ordering code
B66421-U160-K187
B66421-U250-K187
B66421-U315-K187
– 0,873
B66421

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B66421 Summary of contents

Page 1

... P e L1min V nH W/set < 1,80 (200 mT, 100 kHz, 100 ° approx. mm 0,55 0,30 0,22 Calculation of saturation current K3 (25 °C) K4 (25 °C) 154 – 0,796 < 410 nH L 512 08/01 B66421 Ordering code B66421-G-X187 Ordering code B66421-U160-K187 B66421-U250-K187 B66421-U315-K187 K3 (100 °C) K4 (100 °C) 138 – 0,873 ...

Page 2

EFD 25/13/9 Accessories Coil former Material: GFR thermosetting plastic V-0, insulation class to IEC 60085: B66422-B: F max.operating temperature 155 °C; color code green B66422-W: H max.operating temperature 180 °C; color code black Solderability: to IEC 60068-2-20, test ...

Page 3

... ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed. This brochure replaces the previous edition. For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representatives. Due to technical requirements components may contain dangerous substances. For information on the type in question please also contact one of our Sales Offices ...

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