N72

Ferrites and accessories SIFERRIT material N72 Date: September 2006 Data Data Sheet © EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS’ prior express consent is prohibited. SIFERRIT materials N72 Material properties Preferred application Material Base material Symbol Initial permeability (T = 25 °C) μi Unit 2500 ±25% 480 370 15 11 25 … 300 Power transformers N72 MnZn Flux density BS (25 °C) mT (H = 1200 A/m, f = 10 kHz) BS (100 °C) mT Coercive field strength (f = 10 kHz) Optimum frequency range Hysteresis material constant Curie temperature Mean value of αF at 25 … 55 °C Density (typical values) Relative core losses (typical values) 25 kHz, 200 mT, 100 °C 100 kHz, 200 mT, 100 °C 300 kHz, 100 mT, 100 °C 500 kHz, 50 mT, 100 °C Resistivity Core shapes ρ PV kW/m3 kW/m3 kW/m3 kW/m3 Ωm ηB TC Hc (25 °C) A/m Hc (100 °C) kHz 10–6/mT 210 3 4750 80 540 500 — 12 E, EFD Please read Cautions and warnings and Important notes at the end of this document. 2 09/06 SIFERRIT materials N72 Complex permeability versus frequency (measured on R29 toroids, B ≤0.25 mT) Initial permeability μi versus temperature (measured on R29 toroids, B ≤0.25 mT) Amplitude permeability versus AC field flux density (measured on ungapped U cores) Please read Cautions and warnings and Important notes at the end of this document. 3 09/06 SIFERRIT materials N72 Dynamic magnetization curves (typical values) (f = 10 kHz, T = 25 °C) Dynamic magnetization curves (typical values) (f = 10 kHz, T = 100 °C) DC magnetic bias measured on E cores (B ≤0.25 mT, f = 10 kHz, T = 25 °C) 10 4 5 µ rev 5 200 10 2 5 µ e = 100 1900 1000 500 FAL0725-3 DC magnetic bias measured on E cores (B ≤0.25 mT, f = 10 kHz, T = 100 °C) 10 4 5 µ rev 5 210 10 2 5 µ e = 100 2500 1200 530 FAL0726-B 10 1 5 10 1 5 10 0 _ 10 1 10 0 10 1 10 2 A/m 10 4 HDC 10 0 _ 10 1 10 0 10 1 10 2 A/m 10 4 HDC Please read Cautions and warnings and Important notes at the end of this document. 4 09/06 SIFERRIT materials N72 Relative core losses versus AC field flux density (measured on R29 toroids) Relative core losses versus temperature (measured on R29 toroids) Relative core losses versus frequency (measured on R29 toroids) Please read Cautions and warnings and Important notes at the end of this document. 5 09/06 SIFERRIT materials Cautions and warnings General Based on IEC 60401-3, the data specified here are typical data for the material in question, which have been determined principally on the 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 characteristic material data and the data measured using other core shapes and/or core sizes made of the same material. In the absence of further agreements with the manufacturer, only those specifications given for the core shape and/or core size in question are binding. Effects of core combination on AL value Stresses in the core affect not only the mechanical 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 initial permeability. Thus the embedding medium should have the greatest possible elasticity. For detailed information see Data Book 2007, chapter “General – Definitions, 8.2”. Heating up Ferrites can run hot during operation at higher flux densities and higher frequencies. 6 09/06 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. 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 unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described 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 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 therefore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. installation of protective circuitry or redundancy) 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 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). 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