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data sheet data sheet date: june 2013 ?? epcos ag 2013. reproduction, publication and dissemination of this data sheet and the information contained therein without epco s? prior express consent is prohibited. ferrites and accessories rm 8, rm 8 lp ? cores and accessories series/type: b65811, b65812
2 06/13 please read cautions and warnings and ? important notes at the end of this document. example of an assembly set individual parts part no. page adjusting screw b65812 10 core b65811 3 clamps b65812 9 insulating washer 1 b65812 9 coil former b65812 5 , 6 core b65811 3 threaded sleeve (glued-in) insulating washer 2 b65812 9 also available: coil former for ? smps transformers ? b65812 ? 7 coil former for ? power applications ? b65812 ? 8 ? rm 8 low-profile: ? ? core b65811p 11 clamp b65812 12 insulating washers 1 + 2 b65812 12 core and accessories rm 8
3 06/13 please read cautions and warnings and ? important notes at the end of this document. to iec 62317-4 cores without center hole ? for transformer applications delivery mode: sets magnetic characteristics (per set) approx. weight (per set) gapped with ? center hole without ? center hole ? l / a ? l e ? a e ? a min ? v e 0.68 ? 35.1 ? 52 ? ? ? 1825 0.59 ? 38 ? 64 ? 55 ? 2430 mm ?1 ? mm ? mm 2 ? mm 2 ? mm 3 m 10.7 12 g material a l value ? ? ? nh s ? ? approx. ? mm ? e ordering code 1) ? -d with center hole ? -f with threaded sleeve ? -j without center hole n48 250 ? 3% 0.23 134 b65811+0250a048 315 ? 3% 0.17 169 b65811+0315a048 400 ? 3% 0.14 215 b65811+0400a048 630 ? 5% 0.10 338 b65811+0630j048 n41 160 ? 3% 0.49 76 b65811j0160a041 250 ? 5% 0.24 118 b65811j0250j041 630 ? 5% 0.11 298 b65811j0630j041 1600 ? 10% 0.04 756 b65811j1600k041 n87 250 ? 3% 0.30 118 b65811j0250a087 400 ? 3% 0.18 189 b65811j0400a087 1) replace the + by the code letter ?f? or ?d? for the required version. standard version is ?d?. b65811 core rm 8
4 06/13 please read cautions and warnings and ? important notes at the end of this document. ungapped material a l value ? ? nh ? e p v ? ? w/set ordering code ? -d with center hole ? -j without center hole n48 2900 +30/?20% 1550 b65811d0000r048 n30 5700 +30/?20% 2690 b65811j0000r030 t38 12500 +40/?30% 5910 b65811j0000y038 n49 2200 +30/?20% 1040 < 0.37 ( 50 mt, 500 khz, 100 ? c) b65811j0000r049 n87 3300 +30/?20% 1560 < 1.20 (200 mt, 100 khz, 100 ? c) b65811j0000r087 n97 3300 +30/?20% 1560 < 1.00 (200 mt, 100 khz, 100 ? c) b65811j0000r097 n41 4100 +30/?20% 1940 < 0.37 (200 mt, 25 khz, 100 ? c) b65811j0000r041 b65811 core rm 8
5 06/13 please read cautions and warnings and ? important notes at the end of this document. coil former, squared pins material: gfr thermosetting plastic (ul 94 v-0, insulation class to iec 60085: ? h max. operating temperature 180 ? c), color code black ? sumikon pm 9630 ? ? e41429 (m) ? , sumitomo bakelite co ltd 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 2013, chapter ?processing notes, 2.1? for matching clamp and insulating washers see page 9 . sections a n ? mm 2 l n ? mm a r value ? ?? pins ordering code 1 30 42 47 5 b65812n1005d001 8 b65812n1008d001 12 b65812n1012d001 2 28.4 42 50 5 b65812n1005d002 12 b65812n1012d002 version pins omitted 5 pins ? 8 pins 3, 4, 6, 7, 9, 10, 12 ? 3, 4, 9, 10 b65812 accessories rm 8
6 06/13 please read cautions and warnings and ? important notes at the end of this document. coil former, pins squared in the start-of-winding area material: gfr thermosetting plastic (ul 94 v-0, insulation class to iec 60085: ? h max. operating temperature 180 ? c), color code white ? bakelite up 3420 ? ? e61040 (m) ? , hexion specialty chemicals gmbh 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 2013, chapter ?processing notes, 2.1? for matching clamp and insulating washers see page 9 . sections a n ? mm 2 l n ? mm a r value ? ?? pins ordering code 1 30 42 47 5 b65812p1005d001 8 b65812p1008d001 12 b65812p1012d001 2 28.4 42 50 8 b65812p1008d002 hole arrangement ? view in mounting direction 12 pins version pins omitted 5 pins ? 8 pins 3, 4, 6, 7, 9, 10, 12 ? 3, 4, 9, 10 b65812 accessories rm 8
7 06/13 please read cautions and warnings and ? important notes at the end of this document. coil former for smps transf ormers with line isolation the creepage distances and clearances are designed such that the coil former is suitable for use in smps transformers with line isolation. closed center flange with external wire guide pins squared in the start-of-winding area optimized for use with automatic winding machines material: gfr thermosetting plastic (ul 94 v-0, insulation class to iec 60085: ? f max. operating temperature 180 ? c), color code black ? sumikon pm 9630 ? ? e41429 (m) ? , sumitomo bakelite co ltd 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 2013, chapter ?processing notes, 2.1? sections a n ? mm 2 l n ? mm a r value ? ?? pins ordering code 2 28.4 42 50 8 B65812S1108D002 b65812 accessories rm 8
8 06/13 please read cautions and warnings and ? important notes at the end of this document. coil former for power applications optimized for automatic winding material: gfr polyterephthalate (ul 94 v-0, insulation class to iec 60085: ? f max. operating temperature 155 ? c), color code black ? valox 420-se0 ? ? e45329 (m) ? , ge plastics b v 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 2013, chapter ?processing notes, 2.1? for matching clamp and insulating washer 1 see page 9 . sections a n ? mm 2 l n ? mm a r value ? ?? pins ordering code 1 30 42 47 12 b65812c1512t001 hole arrangement ? view in mounting direction ? (note half pitch!) b65812 accessories rm 8
9 06/13 please read cautions and warnings and ? important notes at the end of this document. clamp with ground terminal, made of stainless spring steel (tinned), 0.4 mm thick solderability to iec 60068-2-20, te st ta, method 1 (aging 3): 235 ? c, 2 s also available as strip clamp on reels on request insulating washer 1 between core and coil former for tolerance compensation and for insulation made of polycarbonate (ul 94 v-0, insulation class to iec 60085: e 120 ? c), 0.08 mm thick ? aryphan f685, ? e167358 (m) ? , natural color, lofo high tech film gmbh insulating washer 2 for double-clad pcbs made of polycarbonate (ul 94 v-0, insulation class to iec 60085: e 120 ? c), 0.25 mm thick ? makrofol fr7-2, ? e118859 (m) ? , natural color, bayer materialscience ag clamp ordering code clamp (ordering code per piece, 2 are required) b65812a2203x000 insulating washer 1 (reel packing, pu = 1 reel) b65812a5000x000 insulating washer 2 (bulk) b65812c2005x000 insulating washer 1 insulating washer 2 (preliminary data) b65812 accessories rm 8
10 06/13 please read cautions and warnings and ? important notes at the end of this document. adjusting screw tube core with thread and core brake made of gfr polyterephthalate ? pocan b3235 ? ? e245249 (m) ? , lanxess ag tube core ordering code ? ? length (mm) material color code 3.85 ? 5.0 n22 gray b65812b3003x022 b65812 accessories rm 8
11 06/13 please read cautions and warnings and ? important notes at the end of this document. to iec 62317-4 for compact transformers without center hole delivery mode: sets magnetic characteristics (per set) ? l / a = 0.44 mm ?1 ? l e = 28.7 mm ? a e = 64.9 mm 2 ? a min = 55.4 mm 2 ? v e = 1860 mm 3 approx. weight 9.2 g/set ungapped material a l value ? ? nh ? e p v ? ? w/set ordering code n49 2900 +30/?20% 1020 < 0.33 ( 50 mt, 500 khz, 100 ? c) b65811p0000r049 n92 3100 +30/?20% 1090 < 1.10 (200 mt, 100 khz, 100 ? c) b65811p0000r092 n87 4100 +30/?20% 1440 < 0.92 (200 mt, 100 khz, 100 ? c) b65811p0000r087 b65811p core rm 8 ?low profile?
12 06/13 please read cautions and warnings and ? important notes at the end of this document. clamp with ground terminal, made of stainless spring steel (tinned), 0.4 mm thick solderability to iec 60068-2-20, te st ta, method 1 (aging 3): 235 ? c, 2 s also available as strip clamp on reels on request insulating washer 1 between core and coil former for tolerance compensation and for insulation made of polycarbonate (ul 94 v-0, insulation class to iec 60085: e 120 ? c), 0.08 mm thick ? aryphan f685, ? e167358 (m) ? , natural color, lofo high tech film gmbh insulating washer 2 for double-clad pcbs made of polycarbonate (ul 94 v-0, insulation class to iec 60085: e 120 ? c), 0.25 mm thick ? makrofol fr7-2, ? e118859 (m) ? , natural color, bayer materialscience ag clamp ordering code clamp (ordering code per piece, 2 are required) b65812p2203x000 insulating washer 1 (reel packing, pu = 1 reel) b65812a5000x000 insulating washer 2 (bulk) b65812c2005x000 insulating washer 1 ? (preliminary data) insulating washer 2 b65812 accessories rm 8 ?low profile?
13 06/13 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 chapter ?definitions? , section 8.1. effects of core combination on a l value stresses in the core affect not only the mechanical but also the magnetic properties. it is apparent that the initial permeability is depe ndent 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 chapter ?definitions? , section 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 c hange 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 solderin g of the j-leg terminals may cause solderability problems at the transformer because of pollution wi th sn oxyd of the tin bath or burned insulation of the wire. for detailed information see chapter ?processing notes? , section 8.2. ? the dimensions of the hole arrangement have fixed values and should be understood as ? a recommendation for drilling the printed circuit board. for di mensioning 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 c onsidered by increasing the hole diameter. cautions and warnings ferrites and accessories cautions and warnings
14 06/13 symbol meaning unit a ? a e ? a l ? a l1 ? a min ? a n ? a r ? b ? ? b ? b ? ? ? b ? ? b dc ? b r ? b s ? c 0 ? cdf ? df ? d ? e a ? f ? f cutoff ? f max ? f min ? f r ? f cu ? g ? h ? h ? ? h dc ? h c ? h ? h/ ? i 2 ? i ? i dc ? i ? ? j ? k ? k 3 ? k 3c ? l cross section of coil ? effective magnetic cross section ? inductance factor; a l = l/n 2 ? minimum inductance at defined high saturation ( ? a ) ? minimum core cross section ? winding cross section ? resistance factor; a r = r cu /n 2 ? rms value of magnetic flux density ? flux density deviation ? peak value of magnetic flux density ? peak value of flux density deviation ? dc magnetic flux density ? remanent flux density ? saturation magnetization ? winding capacitance ? core distortion factor ? relative disaccommodation coefficient df = d/ ? i ? disaccommodation coefficient ? activation energy ? frequency ? cut-off frequency ? upper frequency limit ? lower frequency limit ? resonance frequency ? copper filling factor ? air gap ? rms value of magnetic field strength ? peak value of magnetic field strength ? dc field strength ? coercive field strength ? hysteresis coefficient of material ? relative hysteresis coefficient ? rms value of current ? direct current ? peak value of current ? polarization ? boltzmann constant ? third harmonic distortion ? circuit third harmonic distortion ? inductance mm 2 ? mm 2 ? nh ? nh ? mm 2 ? mm 2 ? ?? = 10 ?6 ?? ? vs/m 2 , mt ? vs/m 2 , mt ? vs/m 2 , mt ? vs/m 2 , mt ? vs/m 2 , mt ? vs/m 2 , mt ? vs/m 2 , mt ? f = as/v ? mm ?4.5 ? ? ? j ? s ?1 , hz ? s ?1 , hz ? s ?1 , hz ? s ?1 , hz ? s ?1 , hz ? ? mm ? a/m ? a/m ? a/m ? a/m ? 10 ?6 cm/a ? 10 ?6 cm/a ? a ? a ? a ? vs/m 2 ? j/k ? ? ? h = vs/a symbols and terms ferrites and accessories symbols and terms
15 06/13 symbol meaning unit ? l/l ? l 0 ? l h ? l p ? l rev ? l s ? l e ? l n ? n ? p cu ? p trans ? p v ? pf ? q ? r ? r cu ? r h ? ? r h ? r i ? r p ? r s ? r th ? r v ? s ? t ? ? t ? t c ? t ? t v ? tan ?? ? tan ?? l ? tan ?? r ? tan ?? e ? tan ?? h ? tan ?? / ? i ? u ? ? ? v e ? z ? z n relative inductance change ? inductance of coil without core ? main inductance ? parallel inductance ? reversible inductance ? series inductance ? effective magnetic path length ? average length of turn ? number of turns ? copper (winding) losses ? transferrable power ? relative core losses ? performance factor ? quality factor (q = ? l/r s = 1/tan ?? l ) ? resistance ? copper (winding) resistance (f = 0) ? hysteresis loss resistance of a core ? r h change ? internal resistance ? parallel loss resi stance of a core ? series loss resistance of a core ? thermal resistance ? effective loss resistance of a core ? total air gap ? temperature ? temperature difference ? curie temperature ? time ? pulse duty factor ? loss factor ? loss factor of coil ? (residual) loss factor at h ? 0 ? relative loss factor ? hysteresis loss factor ? relative loss factor of material at h ? 0 ? rms value of voltage ? peak value of voltage ? effective magnetic volume ? complex impedance ? normalized impedance |z| n = |z| /n 2 ? ? (l e /a e ) h ? h ? h ? h ? h ? h ? mm ? mm ? ? w ? w ? mw/g ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? k/w ? ? ? mm ? c ? k ? c ? s ? ? ? ? ? ? ? ? v ? v ? mm 3 ? ? ? ? /mm symbols and terms ferrites and accessories
16 06/13 all dimensions are given in mm. surface-mount device symbol meaning unit ? ? ? f ? ? e ? ? r ? ? ? ? ? ? b ? ? i ? ? s ? ? ? ? 0 ? ? a ? ? app ? ? e ? ? i ? ? p ' ? ? p " ? ? r ? ? rev ? ? s ' ? ? s " ? ? tot ? ? ? ? ? l/a ? ? cu ? ? temperature coefficient (tk) ? relative temperature coefficient of material ? temperature coefficient of effective permeability ? relative permittivity ? magnetic flux ? efficiency of a transformer ? hysteresis material constant ? hysteresis core constant ? magnetostriction at saturation magnetization ? relative complex permeability ? magnetic field constant ? relative amplitude permeability ? relative apparent permeability ? relative effective permeability ? relative initial permeability ? relative real (inductive) component of ? (for parallel components) ? relative imaginary (loss) component of ? (for parallel components) ? relative permeability ? relative reversible permeability ? relative real (inductive) component of ? (for series components) ? relative imaginary (loss) component of ? (for series components) ? relative total permeability ? derived from the static magnetization curve ? resistivity ? magnetic form factor ? dc time constant ? cu = l/r cu = a l /a r ? angular frequency; ?? = 2 ? f 1/k ? 1/k ? 1/k ? ? vs ? ? mt -1 ? a ?1 h ?1/2 ? ? ? vs/am ? ? ? ? ? ? ? ? ? ? ? ? ? ? m ?1 ? mm ?1 ? s ? s ?1 symbols and terms ferrites and accessories
17 06/13 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 prod ucts for a particular customer application . as a rule, epcos is either unfamiliar with indi vidual customer applicat ions 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 safe ty and especially in customer applications in which the malfunction or failure of an elec tronic component could endanger human life or health (e.g. in accident prevention or lifesav ing systems), it must therefore be ensured by means of suitable design of the customer applic ation or other action taken by the customer (e.g. installation of protective circuitry or r edundancy) 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 re strictions in certain jurisdictions (e.g. because they are classed as hazardous) . useful information on th is will be found in our ma- terial data sheets on the internet (www.epc os.com/material). should you have any more de- tailed questions, please contact our sales offices. 5. we constantly strive to im prove 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 pro ducts 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 version of the "general terms of delivery for produc ts and services in the electrical industry" 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, form fit, miniblue, minicell, mkd, mkk, mlsc, motorcap, pcc, phasecap, phasecube, phas emod, phicap, siferrit, sifi, sikorel, silvercap, simdad, simic, simid, sinefor mer, siov, sip5d, sip5k, thermofuse, windcap are trademarks registered or pending in europe and in other countries. further information will be found on the in ternet at www.epcos.com/trademarks. important notes

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