data sheet data sheet date: september 2006 ? epcos ag 2006. reproduction, publication and di ssemination of this publication, enclosures hereto and the information contained therein wit hout epcos? prior expres s consent is prohibited. ferrites and accessories siferrit material T57
2 09/06 please read cautions and warnings and important notes at the end of this document. material properties preferred application broadband transformers material T57 base material mnzn symbol unit initial permeability (t = 25 c) i 4000 25% meas. field strength flux density (near saturation) (f = 10 khz) h b s (25 c) b s (100 c) a/m mt mt 1200 430 270 coercive field strength (f = 10 khz) h c (25 c) h c (100 c) a/m a/m 14 12 optimum frequency range f min f max mhz 0.01 ? 0.5 relative at f min loss factorat f max tan / i 10 ?6 10 ?6 <5 <70 hysteresis material constant b 10 ?6 /mt <0.3 curie temperature t c c >140 relative temperature coefficient at 25 ? 55 c at 5 ? 25 c f 10 ?6 /k ? ? mean value of f at 25 ? 55 c 10 ?6 /k 0.5 density (typical values) kg/m 3 4900 disaccommodation factor at 25 c df 10 ?6 ? resistivity ? m3 core shapes rm, p, ep, toroid T57 siferrit materials
3 09/06 please read cautions and warnings and important notes at the end of this document. T57 siferrit materials complex permeability versus frequency (measured on r17 toroids , b 0. 25 mt) fal0645-b 1 10 2 10 3 10 4 10 f 10 0 10 ? ; s ?? s 10 2 __ 1 10 0 10 12 10 mhz ? s ?? s variation of initial permeability with temperature (measured on r17 toroids, b 0.25 mt) fal0647-s t ii1 - i1 020 40 ?c 80 0 10 % 40 i1 4000 _ 40 20 _ 70 _ 60 _ 50 _ 40 _ 30 _ 20 _ 10 _ 60 initial permeability i versus temperature (measured on r17 toroids, b 0.25 mt) fal0646-j t i 2000 4000 6000 12000 20 60 100 ?c 160 0 _ 60 20 _ relative loss factor versus frequency (measured on r17 toroids, b 0.25 mt) fal0648-1 i tan f 1 10 2 10 3 10 4 10 khz 10 _ 7 10 _ 6 10 5 _ 10 _ 4 10 _ 2
4 09/06 please read cautions and warnings and important notes at the end of this document. T57 siferrit materials dynamic magnetization curves (typical values) (f = 10 khz, t = 25 c) fal0649-9 h 0 b -200 0 200 400 600 800 1000 a/m 1400 100 200 300 400 500 mt reversible permeability versus temperature (measured on toroids at f = 100 khz, h dc = 27.5 a/m, b = 6 mt) fal0651-k t 0 rev ?c 0 _ 20 _ 40 500 1000 1500 2000 2500 3500 4000 20 40 60 100 dynamic magnetization curves (typical values) (f = 10 khz, t = 100 c) fal0650-c h 0 b a/m mt 0 200 400 600 800 1000 1400 100 200 300 400 500 200 _
5 09/06 siferrit materials cautions and warnings general based on iec 60401-3, the data specified here are ty pical data for the material in question, which have been determined principally on t he basis of toroids (ring cores). the purpose of such characteristic material data is to provide the user with improved means for comparing different materials. there is no direct relationship between characte ristic material data and the data measured using other core shapes and/or core sizes made of the sa me material. in the absence of further agree- ments with the manufacturer, only those specificati ons given for the core shape and/or core size in question are binding. effects of core combination on a l value stresses in the core affect not only the mechanica l 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 init ial permeability. thus the embedding medium should have the greatest possible elasticity. for detailed information see data book 2 007, chapter ?general ? definitions, 8.2?. heating up ferrites can run hot during operation at higher flux densitie s and higher frequencies.
6 04/09 important notes the following applies to all produc ts 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 reas ons, 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 us e 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 c ontact 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 publicati on 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, mkk, mlsc, motorcap, pcc, phasecap, phasecube, 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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