EPCOS B78476A8067A003

Magnetics modules for LAN applications
10/100 Base-T magnetics module
Ordering code:
July 2008
© EPCOS AG 2008. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
10/100 Base-T magnetics module
Single port
Ferrite toroid, case and potting (UL 94 V-0)
Compliant with IPC/JEDEC J-STD-020C
Compliant with IEEE 802.3
MSL level 2
Auto MDIX capable
EPCOS, middle block of ordering code, date code
Delivery mode and packing unit
24-mm blister tape,
330-mm ∅ reel (cardboard packaging)
Packing unit: 400 pcs./reel
Dimensional drawing
Layout recommendation
Units: mm [inch]
Values without tolerances are nominal values for reference.
Please read Cautions and warnings and
Important notes at the end of this document.
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10/100 Base-T magnetics module
Single port
Characteristics and ordering code
(electrical specifications at 25 °C)
Ordering code
Turns ratio (primary : secondary)
1CT : 1CT ±3%
Inductance L
350 µH min.
100 kHz, 100 mV, 8 mA DC bias
Voltage test Vtest
1500 V AC
50 Hz, 1 min
Insertion loss
1.2 dB max.
16 dB min.
14 dB min.
13 dB min.
12 dB min.
40 dB min.
40 dB min.
35 dB min.
45 dB min.
40 dB min.
37 dB min.
0.1 MHz ... 100 MHz
1 MHz ... 30 MHz
40 MHz
50 MHz
60 MHz ... 80 MHz
30 MHz
60 MHz
100 MHz
30 MHz
60 MHz
100 MHz
Return loss
Differential to common-mode rejection
Operating temperature range
0 °C ... +70 °C
Approx. 1.3 g
Please read Cautions and warnings and
Important notes at the end of this document.
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10/100 Base-T magnetics module
Single port
Cautions and warnings
For soldering conditions please refer to JEDEC J-STD-020C.
If the components are to be washed varnished it is necessary to check whether the washing
varnish agent that is used has a negative effect on the wire insulation, any plastics that are
used, or on glued joints. In particular, it is possible for washing varnish agent residues to have a
negative effect in the long-term on wire insulation.
The following points must be observed if the components are potted in customer applications:
– Many potting materials shrink as they harden. They therefore exert a pressure on the plastic
housing or core. This pressure can have a deleterious effect on electrical properties, and in
extreme cases can damage the core or plastic housing mechanically.
– It is necessary to check whether the potting material used attacks or destroys the wire
insulation, plastics or glue.
– The effect of the potting material can change the high-frequency behaviour of the
Ferrites are sensitive to direct impact. This can cause the core material to flake, or lead to
breakage of the core.
Even for customer-specific products, conclusive validation of the component in the circuit can
only be carried out by the customer.
Please read Cautions and warnings and
Important notes at the end of this document.
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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 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 an electronic component could endanger human life or
health (e.g. in accident prevention or lifesaving 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 an 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. The
aforementioned does not apply in the case of individual agreements deviating from the foregoing for customer-specific products.
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
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSSP, CTVS, DSSP, MiniBlue, MKK,
MLSC, MotorCap, PCC, PhaseCap, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap,
SIMDAD, SIMID, SineFormer, SIOV, SIP5D, SIP5K, ThermoFuse, 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.
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