Ferrites and accessories
E 20/10/6 (EF 20)
Core and accessories
Series/Type: B66311, B66206
Date: November 2015
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EPCOS AG 2015. 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. E 20/10/6 (EF 20)
Core B66311
To IEC 61246
Delivery mode: single units
Magnetic characteristics (per set)
1
6 l/A = 1.44 mm
l = 46.3 mm
e
2
A = 32.1 mm
e
2
A = 31.9 mm
min
3
V = 1490 mm
e
Approx. weight 7.3 g/set
Ungapped
Material A value P P Ordering code
L e V
nH W/set
N30 2150 +30/20% 2460 B66311G0000X130
N27 1300 +30/20% 1490 < 0.27 (200 mT, 25 kHz, 100 C) B66311G0000X127
N87 1470 +30/20% 1680 < 0.75 (200 mT, 100 kHz, 100 C) B66311G0000X187
Gapped
Material g A value P Ordering code
L e
approx. ** = 27 (N27)
mm nH ** = 87 (N87)
N27, 0.09 0.01 363 415 B66311G0090X1**
N87 0.17 0.02 227 259 B66311G0170X1**
0.25 0.02 171 195 B66311G0250X1**
0.50 0.05 103 118 B66311G0500X1**
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)
Material Relationship between Calculation of saturation current
air gap A value
L
K1 (25 C) K2 (25 C) K3 (25 C) K4 (25 C) K3 (100 C) K4 (100 C)
N27 61.6 0.737 88.1 0.847 80.9 0.865
N87 61.6 0.737 88.5 0.796 78.4 0.873
Validity range: K1, K2: 0.05 mm < s < 1.50 mm
K3, K4: 50 nH < A < 430 nH
L
Please read Cautions and warnings and
2 11/15
Important notes at the end of this document.
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