Ferrites and accessories
ETD 29/16/10
Core and accessories
Series/Type: B66358, B66359
Date: April 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. ETD 29/16/10
Core B66358
ETD 29/16/10 through ETD 59/31/22
To IEC 61185
For SMPS transformers with optimum
weight/performance ratio at small volume
Delivery mode: single units
Magnetic characteristics (per set)
1
6 l/A = 0.93 mm
l = 70.4 mm
e
2
A = 76.0 mm
e
2
A = 71.0 mm
min
3
V = 5350 mm
e
Approx. weight 28 g/set
Ungapped
Material A value P P Ordering code
L e V
nH W/set
N27 2000 +30/20% 1470 < 1.04 (200 mT, 25 kHz, 100 C) B66358G0000X127
N87 2200 +30/20% 1610 < 2.80 (200 mT, 100 kHz, 100 C) B66358G0000X187
N97 2250 +30/20% 1670 < 2.40 (200 mT, 100 kHz, 100 C) B66358G0000X197
Gapped
Material g A value P Ordering code
L e
approx. ** = 27 (N27)
mm nH ** = 87 (N87)
N27, 0.10 0.02 621 457 B66358G0100X1**
N87 0.20 0.02 383 281 B66358G0200X1**
0.50 0.05 201 148 B66358G0500X1**
1.00 r 0.05 124 91 B66358G1000X1**
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 124 0.7 195 0.847 181 0.865
N87 124 0.7 192 0.796 176 0.873
Validity range: K1, K2: 0.10 mm < s < 2.00 mm
K3, K4: 70 nH < A < 680 nH
L
Please read Cautions and warnings and
2 04/15
Important notes at the end of this document.
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