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EPCOS AG 2008, 2009. Reproduction, publication and dissemination of this publication and the information contained therein without EPCOS’ prior express consent is prohibited. SMT current sense transformers E 4.2 core Lmin 33 µH … 1280 µH, sensed current 7 A Series/Type: B82801A Date: September 2008, September 2009

Please read Cautions and warnings and Important notes at the end of this document. Applications Dimensional drawing ■ Switching power supplies ■ Feedback control ■ Overload sensing ■ Load drop/shut down detection

Features

■ Very low DC resistance ■ Different turns ratios ■ Very small package ■ RoHS-compatible Marking No marking on component Delivery mode and packing units ■ 12-mm blister tape, 178-mm  reel ■ Carton packaging ■ Packing units: 600 pcs./reel; 3000 pcs./carton Application circuit and pinning Layout recommendation IND0702-U 3.5 max. 0.15 min.0.6 14 0.4 x 0.25 4.7 max. 3.5 max. 2.4 3.3 0.15 IND0703-K 3.45 1.1 1.2 4.84 Dimensions in mm IND0708-Z-E primaryI N secondaryI refVterminatingR B82801ASMT current sense transformers E 4.2 SMT current sensor transformers

Please read Cautions and warnings and Important notes at the end of this document. Technical data and measuring conditions Characteristics and ordering codes Frequency range 50 kHz ... 1 MHz Inductance L (1-2) 100 kHz, 1.0 V, 25 °C DC resistance Rmax Measured at 25 °C Sensed current The max. primary cu rrent of 5 A cause approx. 40 °C temperature rise Test voltage Vtest 50 Hz, 1 s Operating temperature range 40 °C … +125 °C Weight Approx. 0.15 g Lmin Turns ratio Np : Ns DC resistance Rmax (m) Sensed current A Vtest V AC Ordering code primary secondary 33 1 : 20 2.5 320 7 360 B82801A0333A020 74 1 : 30 2.5 800 7 360 B82801A0743A030 132 1 : 40 2.5 1300 7 360 B82801A0134A040 205 1 : 50 2.5 2200 7 360 B82801A0214A050 295 1 : 60 2.5 3600 7 360 B82801A0304A060 400 1 : 70 2.5 4600 7 360 B82801A0404A070 820 1 : 100 2.5 8700 7 360 B82801A0824A100 1280 1 : 125 2.5 13000 7 360 B82801A0135A125 B82801ASMT current sense transformers E 4.2 SMT current sensor transformers

■ Please note the recommendations in our Inductors data book (latest edition or in the internet) and in the data sheets. – Particular attention should be paid to the derating curves given there. – The soldering conditions should also be observed. Temperat ures quoted in relation to wave soldering refer to the pin, not the housing. ■ 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. T hey therefore exert a pressure on the plastic housing or core. This pressure can have a delet erious effect on electr ical 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 c an cause the core material to flake, or lead to breakage of the core. ■ Even for customer-specific produc ts, conclusive validation of t he 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.

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 produc ts 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 unfam iliar with individual customer appl ications 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 pr oduct 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 life-saving systems), it must ther efore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. in stallation of protective circuitry or redundancy) that no injury or damage is sustai ned 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). S hould 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 c heck therefore to what extent pr oduct 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 pr oducts named in this publication will always be available. The aforementioned does not apply in the case of individual agreement s 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 (ZVEI). 7. The trade names EPCOS, BAOKE, Alu-X, Ce raDiode, CSMP, CSSP, CTVS, DSSP, MiniBlue, MiniCell, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, 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.