Ferrites and accessories
E 25/13/7 (EF 25)
Core and accessories
Series/Type: B66317, B66208
Date: June 2016
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EPCOS AG 2016. 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 25/13/7 (EF 25)
Core B66317
To IEC 61246
Delivery mode: single units
Magnetic characteristics (per set)
1
6 l/A = 1.1 mm
l = 57.5 mm
e
2
A = 52.5 mm
e
2
A = 51.5 mm
min
3
V = 3020 mm
e
Approx. weight 16 g/set
Ungapped
Material A value P P Ordering code
L e V
nH W/set
N30 2900 +30/20% 2530 B66317G0000X130
N27 1750 +30/20% 1520 < 0.59 (200 mT, 25 kHz, 100 C) B66317G0000X127
N87 1850 +30/20% 1620 < 1.60 (200 mT, 100 kHz, 100 C) B66317G0000X187
Gapped
Material g A value P Ordering code
L e
approx. ** = 27 (N27)
mm nH ** = 87 (N87)
N27, 0.10 0.02 489 425 B66317G0100X1**
N87 0.16 0.02 347 302 B66317G0160X1**
0.25 0.02 250 218 B66317G0250X1**
0.50 0.05 151 131 B66317G0500X1**
1.00 0.05 91 79 B66317G1000X1**
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 90 0.731 139 0.847 129 0.865
N87 90 0.731 139 0.796 125 0.873
Validity range: K1, K2: 0.10 mm < s < 2.00 mm
K3, K4: 60 nH < A < 570 nH
L
Please read Cautions and warnings and
2 06/16
Important notes at the end of this document.
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