B78476A8065A003 - EPCOS AG

Magnetics modules for LAN applications

10/100 Base-T magnetics module

Series/Type: B78476A8065A003

Date: August 2012

information contained therein without EPCOS' prior express consent is prohibited.

Features

Ferrite toroid, case and potting (UL 94 V-0)

Compliant with IPC/JEDEC J-STD-020D

Compliant with IEEE 802.3

MSL level 2

RoHS-compatible

Marking

EPCOS, middle block of ordering code, date code

Delivery mode and packing unit

24-mm blister tape,

330-mm ∅reel (cardboard packaging)

Packing unit: 500 pcs./reel

Dimensional drawing

Layout recommendation

Dimensions in mm [inch]

Values without tolerances are nominal values for reference.

10/100 Base-T magnetics module B78476A8065A003

Single port

Page 2 of 5Please read Cautions and warnings and

Important notes at the end of this document.

Pinning

Characteristics and ordering code

(electrical specifications at +25 °C)

Ordering code B78476A8065A003

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 1.0 dB max. 0.1 MHz ... 100 MHz

Return loss 20 dB min.

18 dB min.

16 dB min.

12 dB min.

1 MHz ... 30 MHz

40 MHz

50 MHz

60 MHz ... 80 MHz

Crosstalk 45 dB min.

40 dB min.

35 dB min.

30 MHz

60 MHz

100 MHz

Differential to common-mode

rejection (DCMR)

42 dB min.

37 dB min.

33 dB min.

30 MHz

60 MHz

100 MHz

Operating temperature range 0°C ... +70 °C

Weight Approx. 0.8 g

10/100 Base-T magnetics module B78476A8065A003

Single port

Page 3 of 5Please read Cautions and warnings and

Important notes at the end of this document.

Cautions and warnings

For soldering conditions of SMD components please refer to JEDEC J-STD-020D.

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.

Washing processesmay damage the product due to the possible static or cyclic mechanical

loads (e.g. ultrasonic cleaning). They may cause cracks to developon the product and its parts,

which might lead to reduced reliability or lifetime.

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

components.

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.

10/100 Base-T magnetics module B78476A8065A003

Single port

Page 4 of 5Please read Cautions and warnings and

Important notes at the end of this document.

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 re-

quirements 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 incum-

bent on the customer to check and decide whether an EPCOS product with the properties de-

scribed 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 Ma-

terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more de-

tailed 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 fore-

going for customer-specific products.

6. Unless otherwise agreed in individual contracts, all orders are subject to the current ver-

sion of the "General Terms of Delivery for Products and Services in the Electrical In-

dustry" published by the German Electrical and Electronics Industry Association

(ZVEI).

7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CeraLink, CSMP, CSSP, CTVS,

DeltaCap, DigiSiMic, DSSP, FilterCap, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC,

MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL,

SilverCap, SIMDAD, SiMic, 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.

Important notes

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