FERROXCUBE DATA SHEET 3E28 Material specification Supersedes data of September 2004 2008 Sep 01 Ferroxcube Material specification 3E28 3E28 SPECIFICATIONS A medium permeability material optimized for use in wideband LAN transformers with a high DC-bias current over a wide temperature range. SYMBOL CONDITIONS VALUE 25 °C; ≤10 kHz; 0.25 mT 4000 ± 20% B 25 °C; 10 kHz; 1200 A/m ≈ 440 100 °C; 10 kHz; 1200 A/m ≈ 280 tanδ/µi 25 °C; 100 kHz; 0.25 mT ≤ 5 × 10−6 ρ DC; 25 °C ≈1 Ωm TC ≥ 145 °C density ≈ 4800 kg/m3 3E28 µ's , µ''s UNIT µi CBW445 10 5 handbook, halfpage 10 4 µ's mT µ''s 10 3 2 10 10 2 10 Fig.1 CBW448 10000 handbook, halfpage 25oC 100oC B (mT) 400 6000 300 4000 200 2000 100 f (MHz) 10 CBW446 500 8000 1 Complex permeability as a function of frequency. handbook, halfpage 3E28 µi 0 50 1 3E28 0 50 Fig.2 2008 Sep 01 150 T ( o C) 250 25 0 25 50 150 250 H (A/m) Initial permeability as a function of temperature. Fig.3 Typical B-H loops. 149 Ferroxcube Material specification 3E28 CBW444 10 4 handbook, halfpage 3E28 µ rev 10 3 10 2 10 1 Fig.4 2008 Sep 01 10 10 2 3 H (A/m) 10 Reversible permeability as a function of magnetic field strength. 150 Ferroxcube Material specification 3E28 DATA SHEET STATUS DEFINITIONS DATA SHEET STATUS PRODUCT STATUS DEFINITIONS Preliminary specification Development This data sheet contains preliminary data. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. DISCLAIMER Life support applications These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube for any damages resulting from such application. PRODUCT STATUS DEFINITIONS STATUS INDICATION DEFINITION Prototype These are products that have been made as development samples for the purposes of technical evaluation only. The data for these types is provisional and is subject to change. Design-in These products are recommended for new designs. Preferred These products are recommended for use in current designs and are available via our sales channels. Support These products are not recommended for new designs and may not be available through all of our sales channels. Customers are advised to check for availability. 2008 Sep 01 151