B66421G0000X187 EPCOS Inc, B66421G0000X187 Datasheet

FERRITE CORE, HALF, EFD25

B66421G0000X187

Manufacturer Part Number
B66421G0000X187
Description
FERRITE CORE, HALF, EFD25
Manufacturer
EPCOS Inc
Series
EFDr
Datasheet

Specifications of B66421G0000X187

Ferrite Grade
N87
Core Size
EFD25
Svhc
No SVHC (18-Jun-2010)
External Depth
9.1mm
External Length / Height
12.5mm
External Width
25mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
EFD 25/13/9
Core
I
E core with flattened, lower center leg
for especially flat transformer design
I
For DC/DC converters
I
EFD cores are supplied as single units
Magnetic characteristics (per set)
–1
l/A = 0,98 mm
l
= 57 mm
e
2
A
= 58 mm
e
2
A
= 57 mm
min
3
V
= 3 310 mm
e
Approx. weight 16,6 g/set
Ungapped
Material
A
value
L
nH
N87
2000 + 30/– 20 % 1560 1280
Gapped
Material
A
value
L
nH
N87
160
10 %
125
250
10 %
195
315
10 %
246
The A
value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
L
one gapped core (dimension g > 0).
Calculation factors (for formulas, see “E cores: general information”, page 382)
Material
Relationship between
air gap – A
value
L
K1 (25 °C)
K2 (25 °C)
N87
103
– 0,734
Validity range:
K1, K2: 0,10 mm < s < 1,40 mm
K3, K4: 50 nH < A
A
P
e
L1min
V
nH
W/set
< 1,80
(200 mT, 100 kHz, 100 °C)
g
e
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

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B66421G0000X187 Summary of contents

Page 1

... The A value in the table applies to a core set comprising one ungapped core (dimension and L one gapped core (dimension g > 0). Calculation factors (for formulas, see “E cores: general information”, page 382) Material Relationship between air gap – A value L K1 (25 °C) K2 (25 ° ...

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

Herausgegeben von EPCOS AG Marketing Kommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND  EPCOS AG 2000. Alle Rechte vorbehalten. Vervielfältigung, Veröffentlichung, Verbreitung und Verwertung dieser Broschüre und ihres Inhalts ohne ausdrückliche Genehmigung der EPCOS AG nicht gestattet. Mit den ...

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