Ferrites and accessories Toroids R 34.0 × 20.5 × 12.5 Series/Type: B64290L0048 Date: July 2014 Data Sheet EPCOS AG 2015. 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.
R 34.0 × 20.5 × 12.5 B64290L0048 R 34.0 × 20.5 × 12.5 (mm) R 1.339 × 0.807 × 0.492 (inch) ■ Epoxy coating Dimensions da (mm) di (mm) Height (mm) da (inch) di (inch) Height (inch) 34.0 ±0.7 20.5 ±0.5 12.5 ±0.3 1.339 ±0.028 0.807 ±0.020 0.492 ±0.012 uncoated 1) 35.5 max. 19.2 min. 13.6 max. 1.398 max. 0.756 min. 0.535 max. coated Characteristics and ordering codes Mate- AL value rial Ordering code μi (approx.
Ferrites and accessories 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 Symbol Meaning Unit A Ae AL AL1 Amin AN AR B ΔB B̂ ΔB̂ BDC BR BS C0 CDF DF d Ea f fcutoff fmax fmin fr fCu g H Ĥ HDC Hc h h/μi 2 I IDC Î J k k3 k3c L Cross section of coil Effective magnetic cross section Inductance factor; AL = L/N2 Minimum inductance at defined high saturation ( μa) Minimum core cross section Winding cross section Resistance factor; AR = RCu /N2 RMS value of magnetic flux density Flux density deviation Peak value of magnetic flux density P
Ferrites and accessories Symbols and terms Symbol Meaning Unit ΔL/L L0 LH Lp Lrev Ls le lN N PCu Ptrans PV PF Q R RCu Rh ΔRh Ri Rp Rs Rth RV s T ΔT TC t tv tan δ tan δL tan δr tan δe tan δh tan δ/μi 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 power Relative core losses Performance factor Quality
Ferrites and accessories Symbols and terms Symbol Meaning Unit α αF αe εr Φ η ηB ηi λs μ μ0 μa μapp μe μi μ p' μ p" μr μrev μs' μs" μtot 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 permeabili
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.
