Ferrites and accessories
EFD 20/10/7
Core and accessories
Series/Type: B66417, B66418
Date: May 2017
EPCOS AG 2017. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS prior express consent is prohibited.
EPCOS AG is a TDK Group Company. EFD 20/10/7
Core B66417
E core with flattened, lower center leg
for especially flat transformer design
For DC/DC converters
Delivery mode: single units
Magnetic characteristics (per set)
1
l/A= 1.52 mm
l = 47 mm
e
2
A = 31 mm
e
2
A = 31 mm
min
3
V = 1460 mm
e
Approx. weight 7.2 g/set
Ungapped
Material A value P Ordering code
L e V
nH W/set
N49 910 +30/20% 1100 < 0.29 ( 50 mT, 500 kHz, 100 C) B66417G0000X149
N87 1200 +30/20% 1440 < 1.05 (200 mT, 100 kHz, 100 C) B66417G0000X187
N97 1250 +30/20% 1510 < 0.80 (200 mT, 100 kHz, 100 C) B66417G0000X197
Other A values/air gaps and materials available on request see Processing remarks on page 5.
L
Gapped (A values/air gaps examples)
L
Material A value g Ordering code
L e
approx.
nH mm
N87 100 10% 120 0.49 B66417U0100K187
160 10% 193 0.25 B66417U0160K187
250 10% 300 0.13 B66417U0250K187
330 10% 398 0.09 B66417U0330K187
400 12% 483 0.07 B66417U0400H187
450 15% 543 0.06 B66417U0450L187
The A value in the table applies to a core set comprising one ungapped core (dimension g = 0 mm)
L
and one gapped core (dimension g > 0 mm).
Please read Cautions and warnings and
2 5/17
Important notes at the end of this document.