FERROXCUBE DATA SHEET 3E25 Material specification Supersedes data of September 2004 2008 Sep 01 Ferroxcube Material specification 3E25 3E25 SPECIFICATIONS A medium permeability material mainly for use in current compensated chokes in EMI-suppression filters. SYMBOL CONDITIONS VALUE 25 °C; ≤10 kHz; 0.25 mT 6000 ± 20% B 25 °C; 10 kHz; 1200 A/m ≈ 390 100 °C; 10 kHz; 1200 A/m ≈ 220 25 °C; 100 kHz; 0.25 mT ≤ 25 × 10−6 25 °C; 300 kHz; 0.25 mT ≤ 200 × 10 −6 DC; 25 °C ≈ 0.5 Ωm TC ≥ 125 °C density ≈ 4900 kg/m3 tanδ/µi ρ 3E25 µ's , µ''s UNIT µi MBW026 10 5 handbook, halfpage 10 4 µ's mT µ''s 10 3 2 10 10 2 10 Fig.1 f (MHz) 10 Complex permeability as a function of frequency. 500 handbook, halfpage 25oC 100oC handbook, halfpage 3E25 µi 1 MBW011 MBW029 20000 1 B (mT) 3E25 400 15000 300 10000 200 5000 100 0 −50 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. 137 Ferroxcube Material specification 3E25 MBW040 10 4 handbook, halfpage MBW082 16000 handbook, halfpage 3E25 f = 10 kHz o T=25 C µp 3E25 µ rev 12000 10 3 8000 5 µs 10 2 2 µs 4000 1 µs 0.5 µs 10 1 Fig.4 2008 Sep 01 10 10 2 H (A/m) 10 0 3 0 100 200 300 400 B (mT) Reversible permeability as a function of magnetic field strength. Fig.5 Pulse characteristics (unipolar pulses). 138 Ferroxcube Material specification 3E25 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 01 139