Ferrites and accessories
E 25/13/7 (EF 25)
Core and accessories
Series/Type:
Date:
B66317, B66208
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.
E 25/13/7 (EF 25)
Core
■
To IEC 62317-8
■
Delivery mode: single units
B66317
Magnetic characteristics
(per set)
Σl/A
l
e
A
e
A
min
V
e
= 1.1 mm
–1
= 57.5 mm
= 52.5 mm
2
= 51.5 mm
2
= 3020 mm
3
Approx. weight
16 g/set
Ungapped
Material
N30
N27
N87
N97
A
L
value
nH
2900 +30/–20%
1750 +30/–20%
1850 +30/–20%
1950 +30/–20%
μ
e
2530
1520
1620
1700
< 0.59 (200 mT, 25 kHz, 100 °C)
< 1.60 (200 mT, 100 kHz, 100 °C)
< 1.40 (200 mT, 100 kHz, 100 °C)
P
V
W/set
Ordering code
B66317G0000X130
B66317G0000X127
B66317G0000X187
B66317G0000X197
Gapped
(A
L
values/air gaps examples)
Material
g
mm
N27,
N87
0.10
±0.02
0.16
±0.02
0.25
±0.02
0.50
±0.05
1.00
±0.05
A
L
value
approx.
nH
489
347
250
151
91
μ
e
Ordering code
** = 27 (N27)
**
= 87 (N87)
B66317G0100X1**
B66317G0160X1**
B66317G0250X1**
B66317G0500X1**
B66317G1000X1**
425
302
218
131
79
The A
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0 mm)
and one gapped core (dimension g > 0 mm).
Other A
L
values/air gaps and materials available on request ─ see Processing remarks on page 7.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
2
5/17
E 25/13/7 (EF 25)
Core
Calculation factors
(for formulas, see
“E cores: general information”
)
Material
Relationship between
air gap – A
L
value
K1 (25 °C)
N27
N87
Validity range:
90
90
K2 (25 °C)
–0.731
–0.731
Calculation of saturation current
K3 (25 °C)
139
139
K4 (25 °C)
–0.847
–0.796
K3 (100 °C) K4 (100 °C)
129
125
–0.865
–0.873
B66317
K1, K2: 0.10 mm < s < 2.00 mm
K3, K4: 60 nH < A
L
< 570 nH
Please read
Cautions and warnings
and
Important notes
at the end of this document.
3
5/17
E 25/13/7 (EF 25)
Accessories
Coil former (magnetic axis horizontal or vertical)
GFR polyterephthalate, UL 94 V-0, insulation class to IEC 60085:
B66208B, X: F max. operating temperature 155 °C, color code black
Valox 420-SE0
®
[
E207780 (M)
]
, SABIC JAPAN L L C
B66208-W: H max. operating temperature 180 °C, color code black
Rynite FR 530
®
[
E41938 (M)
]
, E I DUPONT DE NEMOURS & CO INC
Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s
Winding:
see Processing notes, 2.1
Pins:
Squared pins
Yoke
Coil former
Version
Horizontal
Vertical
Sections
1
1
A
N
mm
2
61
61
l
N
mm
50
50
A
R
value
μΩ
28
28
Pins
10
10
B66208B1110T001
B66208X1010T001
B66208W1010T001
B66208A2010X000
Material: Stainless spring steel (0.25 mm)
Ordering code
Material:
B66208
Yoke (ordering code per piece, 2 are required)
Horizontal version (B66208B)
Please read
Cautions and warnings
and
Important notes
at the end of this document.
4
5/17
E 25/13/7 (EF 25)
Accessories
Vertical version (B66208X, B66208W)
B66208
Yoke
Please read
Cautions and warnings
and
Important notes
at the end of this document.
5
5/17
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