B68451-B0080-X351

Ferrite Polymer Composites General Information Ferrite polymer composites Ferrite cores are familiar as brittle, rigid and bulky components for high-inductance coils and transformers. The performance of such ferrites depends very much on external influences such as temperature, pressure, electromagnetic fields and frequency. FPC is a homogeneous mixture of ferrite powder and plastic with outstanding mechanical and magnetic properties. This rugged material can be processed into injection-molded parts or thin, flexible film to open up innovative applications. The new C351 film is suitable for high-temperature applications up to 200 °C and is UL 94-V0-listed. It is also available with copper coatings of 35 to 75 µm and in various thicknesses from 0,2 to 0,4 mm. FPC film of materials C350 and C351 can also be supplied in self-adhesive versions. FPC film is ideal for EMC applications, e.g. to shield coils against metals or absorb interference at frequencies of 500 MHz and higher. It opens up many other applications, such as implementation of low-profile coils for identification systems and electronic article surveillance in retailing and logistics, for sensors or contactless smart cards. FPC can also be used for compensation of deflection yoke coils in TV picture tubes and computer monitors. This innovative material is also suitable as spacing between ferrite cores – instead of air gaps or non-magnetic films – to suppress leakage fields, for instance, or to adjust the biasing curve. 559 08/01 FPC C302 C 302, C 351 Basic features I I I I I Composite material of polymer and ferrite for injection molded parts Minor influence of temperature High dc magnetic bias capability Suitable for a wide frequency range High electrical resistance Technical benefits I High mechanical stability I Excellent dimensional stability I Manufacturing technique: injection molding I Distributed air gap → low winding losses → production of any core shape possible Applications I I I I Inductive proximity switches Identification systems, e.g. immobilizer in automobiles Non-contact power transmission Resonance inductors for DC/DC converters Core shapes on request Physical properties Material Initial permeability; f = 1 MHz Flux density (near saturation) H = 25 kA/m; f = 10 kHz Remanent flux density H = 25 kA/m; f = 10 kHz Coercive field strength H = 25 kA/m; f = 10 kHz Relative loss factor f= 1 MHz f = 100 MHz Hysteresis material constant Temperature coefficient Density Resistivity f = 10 kHz f = 10 MHz Dielectric constant f = 10 kHz f = 10 MHz Max. operating temperature Tmax 560 08/01 Symbol Unit mT mT A/m C302 17 ± 20 % 330 15 770 µi BS (25 °C) Br (25 °C) HC (25 °C) tanδ/µi < 0,0004 < 0,03 ηB α = ∆µ/µ∆T ρ 10 –3/mT 1/K kg/m3 < 0,25 < 0,0002 3500 21 13 Ωm εr 280 100 °C 180 FPC Film C 350, C 351 Basic features I FPC is a composite material of polymer and ferrite I FPC film is a thin, mechanically flexible film B68450 … B68452 Technical benefits I I I I I I I I I I Stable magnetic characteristics Low weight: FPC film is 40% lower in density than ferrite High mechanical strength Shaping as required: customer-specific solutions possible Economy: easy transport and storage, simple, rationalized processing, low mounting volume C351 film suitable for high-temperature applications (up to 200 °C) Material C351 approved to UL 94-V0 (E 140 693) Various film thickness (from 0,2 to 0,4 mm) Self-adhesive versions C351 film with optional copper coatings 35 to 75 µm thick Applications I Implementation of low-profile coils, e.g. for I I I I – identification systems – security tags for electronic article surveillance – sensors – inductive reading of smart cards Electromagnetic shielding of coils from metals to prevent interference EMC: absorption of radiated emissions at frequencies ≥ 500 MHz Compensation of deflection yokes to correct distortion at the corners of TV screens and monitors Spacing between ferrite cores (as a substitute for air gaps or non-magnetic films) for – suppression of the leakage field – adjustment of the biasing curve 561 08/01 FPC Film C 350, C 351 Ordering details The ordering codes are structured as follows: 1st group Design B68450: Film on reel B68451: Film on reel, self-adhesive B68452: Film on reel, copper-coated (only in combination(with C351!) 2nd group Film thickness/width A: 0,2 mm B: 0,3 mm C: 0,4 mm A: 35 µm B: 50 µm C: 75 µm 351 0080: 80 mm 3rd group Copper coating1) /material X: Default letter 350 351 B68450 … B68452 Material C350 C351 C350 C350 C351 C351 C351 C351 Thickness (mm) 0,2 0,2 0,2 0,2 0,3 0,3 0,2 0,2 Extra features Ordering code B68450-A0080-X350 B68450-A0080-X351 self-adhesive self-adhesive copper-coated B68451-A0080-X350 B68451-A0080-X350 B68451-B0080-X351 B68451-B0080-X351 B68452-A0080-X351 B68452-A0080-X351 FPC film is supplied in units of 50 m length. 1) Copper coating only in combination with C351. 562 08/01 FPC Film C 350, C 351 Physical properties (material values defined on 0,2 mm thick film) Material Initial permeability 1) f = 1 MHz Flux density (near saturation) 1) H = 25 kA/m f = 10 kHz Remanent flux density 1) H = 25 kA/m f = 10 kHz Coercive field strength 1) H = 25 kA/m f = 10 kHz Relative loss factor 1) f = 10 MHz f = 1 GHz Hysteresis material constant Temperature Density Resistivity 1) f = 1 kHz f = 10 MHz Dielectric constant 1) f = 1 kHz f = 10 MHz Dielectric strength Max. operating temperature Tensile strength 2) Tearing resistance 2) Compressibility 2) Tmax coefficient1) BS mT 255 255 Symbol Unit C350 9 ± 20 % C351 3) 9 ± 20 % B68450 … B68452 µi Br mT 9 9 HC A/m 600 600 tanδ/µi < 0,005 < 0,400 < 0,005 < 0,400