Ferrites and accessories RM 12, RM 12 LP Core and accessories Series/Type: B65815, B65816 Date: Februiary 2016 a~í~=pÜÉÉí ¤ EPCOS AG 2016. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS’ prior express consent is prohibited. EPCOS AG is a TDK Group Company.
RM 12 Core and accessories Individual parts Part no. Page Core B65815 3 Clamps B65816 6 Coil former B65816 4 Core B65815 3 Coil former for power applications B65816 5 RM 12 low-profile: Core B65815P 7 Example of an assembly set Also available: Please read Cautions and warnings and Important notes at the end of this document.
RM 12 Core B65815 ■ To IEC 62317-4 ■ Optimized core cross section and increased thickness of base for power applications ■ Without center hole ■ Delivery mode: sets Magnetic characteristics (per set) 6l/A le Ae Amin Ve = 0.39 mm–1 = 57 mm = 146 mm2 = 125 mm2 = 8320 mm3 Approx. weight 45 g/set Gapped Material AL value nH s approx. mm Pe Ordering code -E without center hole N41 160 r3% 250 r3% 400 r5% 1000 r5% 1.30 0.70 0.35 0.
RM 12 Accessories B65816 Coil former Material: GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085: H max. operating temperature 155 qC), 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 qC, 2 s Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 qC, 3.5 s Winding: see Data Book 2013, chapter “Processing notes, 2.1” Squared pins. For matching clamp see page 6.
RM 12 Accessories B65816 Coil former for power applications Material: GFR polyterephthalate (UL 94 V-0, insulation class to IEC 60085: F max. operating temperature 155 qC), color code black Valox 420-SE0 ® >E45329 (M)@, Sabic Innovative Plastic Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 qC, 2 s Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 qC, 3.5 s Winding: see Data Book 2013, chapter “Processing notes, 2.1” For matching clamp see page 6.
RM 12 Accessories B65816 Clamp ■ With ground terminal, made of spring steel (tinned), 0.45 mm thick ■ Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 qC, 2 s Ordering code Clamp (ordering code per piece, 2 are required) Please read Cautions and warnings and Important notes at the end of this document.
RM 12 »Low Profile« Core ■ ■ ■ ■ B65815P To IEC 62317-4 For compact transformers Without center hole Delivery mode: sets Magnetic characteristics (per set) 6l/A le Ae Amin Ve = 0.29 mm–1 = 42 mm = 147.5 mm2 = 124.7 mm2 = 6195 mm3 Approx. weight 33.6 g/set Ungapped Material AL value Pe PV nH W/set Ordering code N49 4500 +30/–20% 1020 < 1.21 ( 50 mT, 500 kHz, 100 qC) B65815P0000R049 N92 4800 +30/–20% 1090 < 3.
Ferrites and accessories Cautions and warnings Cautions and warnings 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.
Ferrites and accessories Symbols and terms Symbols and terms Symbol Meaning Unit A Ae AL AL1 Amin AN AR B 'B B̂ 'B̂ BDC BR BS C0 CDF DF d Ea f fcutoff fmax fmin fr fCu g H Ĥ HDC Hc h h/Pi 2 I IDC Î Cross section of coil Effective magnetic cross section Inductance factor; AL = L/N2 Minimum inductance at defined high saturation ( Pa) Minimum core cross section Winding cross section Resistance factor; AR = RCu /N2 RMS value of magnetic flux density Flux dens
Ferrites and accessories Symbols and terms Symbol Meaning Unit 'L/L L0 LH Lp Lrev Ls le lN N PCu Ptrans PV PF Q R RCu Rh 'Rh Ri Rp Rs Rth RV s T 'T TC t tv tan G tan GL tan Gr tan Ge tan Gh tan G/Pi U Û Ve Z Zn 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 powe
Ferrites and accessories Symbols and terms Symbol Meaning Unit D DF De Hr ) K KB Ki Os P P0 Pa Papp Pe Pi Pp' Pp" Pr Prev Ps' Ps" Ptot 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
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.
