Data Sheet
Data Sheet
Date:
September 2006
EPCOS AG 2006. Reproduction, publication and dissemination of this data sheet and the
information contained therein without EPCOS' prior express consent is prohibited.
Ferrites and accessories
E 30/15/7
Core and accessories
Series/Type:
B66319, B66232
2
09/06
Please read Cautions and warnings and
Important notes at the end of this document.
Delivery mode: single units
Magnetic characteristics (per set)
l/A = 1.12 mm
1
l
e
= 67 mm
A
e
= 60 mm
2
A
min
= 49 mm
2
V
e
= 4000 mm
3
Approx. weight 22 g/set
Ungapped
Gapped
The A
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
one gapped core (dimension g > 0).
Calculation factors (for formulas, see "E cores: general information")
Validity range:
K1, K2: 0.10 mm < s < 2.00 mm
K3, K4: 560 nH < A
L
< 60 nH
Material
A
L
value
nH
e
P
V
W/set
Ordering code
N30
3100 +30/20%
2760
B66319G0000X130
N27
1700 +30/20%
1510
< 0.81 (200 mT, 25 kHz, 100 C)
B66319G0000X127
N87
1900 +30/20%
1690
< 2.20 (200 mT, 100 kHz, 100 C)
B66319G0000X187
Material
g
mm
A
L
value
approx.
nH
e
Ordering code
** = 27 (N27)
**
= 87 (N87)
N27,
0.10
0.02
460
410
B66319G0100X1**
N87
0.18
0.02
300
265
B66319G0180X1**
0.34
0.02
195
175
B66319G0340X1**
Material
Relationship between
air gap A
L
value
Calculation of saturation current
K1 (25 C)
K2 (25 C)
K3 (25 C)
K4 (25 C)
K3 (100 C)
K4 (100 C)
N27
90
0.708
156
0.847
144
0.865
N87
90
0.708
154
0.796
140
0.873
B66319
Core
E 30/15/7
3
09/06
Please read Cautions and warnings and
Important notes at the end of this document.
Coil former (magnetic axis horizontal or vertical)
Material:
GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085:
F max. operating temperature 155 C), color code black
B66232A, B: Valox 420-SE0
[E45329 (M)], GE PLASTICS B V
B66232J: Pocan B4235
[E245249 (M)], LANXESS AG
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 Data Book 2007, chapter "Processing notes, 2.1"
Squared pins.
Yoke
Material: Stainless spring steel (0.4 mm)
Horizontal version
Coil former
Ordering code
Version
Sections
A
N
mm
2
l
N
mm
A
R
value
Pins
Horizontal
1
90
56
21
14
B66232A1114T001
B66232B1114T001
Vertical
1
90
56
21
12
B66232J1112T001
Yoke (ordering code per piece, 2 are required)
B66232A2010X000
22,86
1,6+0,1
5,08
6 x 5,08 = 30,48
1
7
8
14
0,2
8,9
_
0,5
_
31,4
7,5+0,2
0,3
19,2
_
_
35,4 0,5
7,5+0,25
2,6
0,1
_
3,5
0,5
_
20 max.
0,7
0,8
0,8
0,3
_
19,1
0,2
8,9
_
Hole arrangement
View in
mounting direction
FEK0122-J
B66232
Accessories
E 30/15/7
4
09/06
Please read Cautions and warnings and
Important notes at the end of this document.
Vertical version
Yoke
FEK0325-L
8,9 0,2
_
0,3
_
19,2
_
35,4 0,5
31,8 max.
3,50,3
3
0,1
_
19,2 0,3
_
0,9
0,9
0,2
19,1
_
0,7
1,6+0,1
5 x 5,08 = 25,4
5,08
15,24
1
6
12
7
7,5+0,2
7,5+0,2
0,2
8,9
_
Hole arrangement
View in mounting direction
FEK0455-E
7.20.2
+0.5
33.9
0.2
_
6.250.3
7.20.2
1.7+0.2
B66232
Accessories
E 30/15/7
5
09/06
Ferrites and accessories
Cautions and warnings
Mechanical stress and mounting
Ferrite cores have to meet mechanical requirements during assembling and for a growing number
of applications. Since ferrites are ceramic materials one has to be aware of the special behavior
under mechanical load.
As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing
or tensile load. Especially high cooling rates under ultrasonic cleaning and high static or cyclic loads
can cause cracks or failure of the ferrite cores.
For detailed information see Data Book 2007, chapter "General Definitions, 8.1".
Effects of core combination on A
L
value
Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent
that the initial permeability is dependent on the stress state of the core. The higher the stresses are
in the core, the lower is the value for the initial permeability. Thus the embedding medium should
have the greatest possible elasticity.
For detailed information see Data Book 2007, chapter "General Definitions, 8.2".
Heating up
Ferrites can run hot during operation at higher flux densities and higher frequencies.
NiZn-materials
The magnetic properties of NiZn-materials can change irreversible in high magnetic fields.
Processing notes
The start of the winding process should be soft. Else the flanges may be destroid.
To strong winding forces may blast the flanges or squeeze the tube that the cores can no more
be mount.
To long soldering time at high temperature (>300 C) may effect coplanarity or pin arrangement.
Not following the processing notes for soldering of the J-leg terminals may cause solderability
problems at the transformer because of pollution with Sn oxyd of the tin bath or burned insulation
of the wire. For detailed information see Data Book 2007, chapter "Processing notes, 2.2".
The dimensions of the hole arrangement have fixed values and should be understood as a
recommendation for drilling the printed circuit board. For dimensioning the pins, the group of
holes can only be seen under certain conditions, as they fit into the given hole arrangement. To
avoid problems when mounting the transformer, the manufacturing tolerances for positioning the
customers' drilling process must be considered by increasing the hole diameter.
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