Data SheetData 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
EP 7
Core and accessories
Series/Type: B65839, B65840
209/06
Please read Cautions and warnings and
Important notes at the end of this document.
To IEC 61596
For transformers featuring high inductance
and low overall height
For power applications
Delivery mode: sets
Magnetic characteristics (per set)
Σ l/A= 1.52 mm
–1
le= 15.7 mm
Ae= 10.3 mm2
Amin = 8.5 mm2
Ve= 162 mm3
Approx. weight 1.4 g/set
Gapped
Material AL value
nH
s
approx.
mm
µeOrdering code
T38 63 ±3% 0.20 76 B65839A0063A038
100 ±3% 0.13 121 B65839A0100A038
160 ±5% 0.08 194 B65839A0160J038
200 ±6% 0.06 243 B65839A0200C038
250 ±7% 0.05 303 B65839A0250E038
T57 63 ±3% 0.20 76 B65839A0063A057
100 ±3% 0.13 121 B65839A0100A057
160 ±5% 0.08 194 B65839A0160J057
200 ±6% 0.06 243 B65839A0200C057
250 ±7% 0.05 303 B65839A0250E057
N45 63 ±3% 0.20 76 B65839A0063A045
100 ±3% 0.13 121 B65839A0100A045
160 ±5% 0.08 194 B65839A0160J045
200 ±6% 0.06 243 B65839A0200C045
250 ±7% 0.05 303 B65839A0250E045
N87 63 ±3% 0.20 76 B65839A0063A087
100 ±3% 0.12 121 B65839A0100A087
160 ±5% 0.07 194 B65839A0160J087
200 ±6% 0.06 243 B65839A0200C087
250 ±7% 0.05 303 B65839A0250E087
FEP0004-T
9,4 0,4
_
0,27,5
_
0,36,5
_
5+0,4 1,7±0,1
7,2+0,4
4,4
s
)
0,23,4
_
gapped (one-sided)
)
B65839Core
EP 7
309/06
Please read Cautions and warnings and
Important notes at the end of this document.
Ungapped
Material AL value
nH
µePV
W/set
Ordering code
T57 1500 +30/–20% 1820 B65839A0000R057
N45 1500 +30/–20% 1820 B65839A0000R045
N30 2000 +30/–20% 2430 B65839A0000R030
T65 3000 +30/–20% 3640 B65839A0000R065
T38 5200 +40/–30% 6310 B65839A0000Y038
T66 5800 +40/–30% 7040 B65839A0000Y066
N87 1100 +30/–20% 1330 < 0.08 (200 mT, 100 kHz, 100 °C) B65839A0000R087
B65839Core
EP 7
409/06
Please read Cautions and warnings and
Important notes at the end of this document.
Coil former
Material: GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:
F max. operating temperature 155 °C), color code green
Vyncolit/X611 ® [E167521 (M)], VYNCOLIT NV
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.
Cap yoke
With ground terminal, made of stainless spring steel (tinned), 0.25 mm thick
Coil former Cap yoke
Coil former Ordering code
Sections AN
mm2
lN
mm
AR value
µΩ
Terminals
14.7 17.7 128.7 6B65840B1006D001
24.2 17.7 143.8 6B65840B1006D002
Cap yoke B65840D2000X000
FEP0005-Z-E
View in mounting direction
Hole arrangement
4.8
ø1+0.2
2.54
Ground ø1.3+0.2
8.5 0.2
4.4 0.15
_
10.7
7 0.15
_
0.2
_
0.2
+0.3
1.25
3.2
_
0.1
_
3.6+0.1
Marking
of pin 1
_
0.45 0.5±0.05
ø3.5+0.1
0.1
_
FEP0006-U
5,6
3,8
9,1
7,65 min.
3,9
8,2 min.
9,6 min. 0,4
0,8
A
View A
6,6 min.
_
1 0,1
B65840Accessories
EP 7
509/06
Please read Cautions and warnings and
Important notes at the end of this document.
SMD coil former with gullwing terminals
Material: GFR liquid crystal polymer (UL 94 V-0), color code black
Sumika Super E4008
® [E54705 (M)], SUMITOMO CHEMICAL CO LTD
Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s
permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s
Sections AN
mm2
lN
mm
AR value
µΩ
Terminals Ordering code
14.5 18.1 138.1 6B65840N1106T001
FEK0475-T-E
3.5±0.1
12.7±0.15
5.08
2.54
1.3
2.54
13.5
2
ø4.5±0.2
8.6±0.2
7±0.2
9.2±0.2
4.8±0.2
3.6±0.1
5.35±0.2
0.3
0.6
Recommended
PCB layout
B65840
Preliminary data
Accessories
EP 7
609/06
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 AL 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.
709/06
Important notes
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical
requirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application. As
a rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them
than the customers themselves. For these reasons, it is always ultimately incumbent on the
customer to check and decide whether an EPCOS product with the properties described in the
product specification is suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of passive electronic components
or failure before the end of their usual service life cannot be completely ruled out in the
current state of the art, even if they are operated as specified. In customer applications
requiring a very high level of operational safety and especially in customer applications in which
the malfunction or failure of a passive electronic component could endanger human life or health
(e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of
suitable design of the customer application or other action taken by the customer (e.g.
installation of protective circuitry or redundancy) that no injury or damage is sustained by third
parties in the event of malfunction or failure of a passive electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as “hazardous”). Useful information on this will be found in our
Material Data Sheets on the Internet (www.epcos.com/material). Should you have any more
detailed questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order.
We also reserve the right to discontinue production and delivery of products.
Consequently, we cannot guarantee that all products named in this publication will always be
available.
6. Unless otherwise agreed in individual contracts, all orders are subject to the current version
of the “General Terms of Delivery for Products and Services in the Electrical Industry”
published by the German Electrical and Electronics Industry Association (ZVEI).
7. The trade names EPCOS, EPCOS-JONES, Baoke, Alu-X, CeraDiode, CSSP, MLSC,
PhaseCap, PhaseMod, SIFI, SIFERRIT, SIKOREL, SilverCap, SIMID, SIOV, SIP5D, SIP5K,
UltraCap, WindCap are trademarks registered or pending in Europe and in other countries.
Further information will be found on the Internet at www.epcos.com/trademarks.