B66421U0315K187 EPCOS Inc, B66421U0315K187 Datasheet - Page 2
B66421U0315K187
Manufacturer Part Number
B66421U0315K187
Description
FERRITE CORE, HALF, GAPPED, EFD25
Manufacturer
EPCOS Inc
Series
B66421r
Datasheet
1.B66421G0000X197.pdf
(5 pages)
Specifications of B66421U0315K187
Ferrite Grade
N87
Core Size
EFD25
Svhc
No SVHC (18-Jun-2010)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
B66421U0315K187
Manufacturer:
EPCOS
Quantity:
30 000
■
■
■
Magnetic characteristics (per set)
Σ l/A = 0.98 mm
l
A
A
V
Approx. weight 16.6 g/set
Ungapped
Material
N87
N97
Gapped
Material
N87
The A
one gapped core (dimension g > 0).
Calculation factors (for formulas, see “E cores: general information”)
Material
N87
Validity range:
Please read Cautions and warnings and
Important notes at the end of this document.
e
e
min
e
EFD 25/13/9
Core
E core with flattened, lower center leg
for especially flat transformer design
For DC/DC converters
Delivery mode: single units
= 57 mm
= 58 mm
= 57 mm
= 3310 mm
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
A
nH
2000 +30/–20%
2100 +30/–20%
A
nH
160 ±10%
250 ±10%
315 ±10%
L
L
2
2
value
value
Relationship between
air gap – A
K1 (25 °C)
103
–1
3
K1, K2: 0.10 mm < s < 1.40 mm
K3, K4: 50 nH < A
L
value
K2 (25 °C)
– 0.734
µ
1560
1640
µ
125
195
246
e
e
L
P
W/set
< 1.8 (200 mT, 100 kHz, 100 °C)
< 1.5 (200 mT, 100 kHz, 100 °C)
< 410 nH
V
Calculation of saturation current
K3 (25 °C)
154
2
09/06
g
approx. mm
0.55
0.30
0.22
K4 (25 °C)
– 0.796
K3 (100 °C) K4 (100 °C)
138
Ordering code
B66421G0000X187
B66421G0000X197
Ordering code
B66421U0160K187
B66421U0250K187
B66421U0315K187
– 0.873
B66421