FERROXCUBE DATA SHEET 3B7 Material specification Supersedes data of September 2004 2008 Sep 01 Ferroxcube Material specification 3B7 3B7 SPECIFICATIONS A low frequency filter material optimized for frequencies up to 0.1 MHz. SYMBOL µi B tanδ/µi CONDITIONS VALUE 25 °C; ≤10 kHz; 0.25 mT 25 °C; 10 kHz; 1200 A/m 2300 ±20% 100 °C; 10 kHz; 1200 A/m 25 °C; 100 kHz; 0.25 mT 25 °C; 500 kHz; 0.25 mT ≈ 320 UNIT ≈ 440 3B7 µ's , µ''s 10 3 µ's mT µ''s 10 2 ≤ 5 × 10−6 ≈ 25 × 10−6 25 °C; 1 MHz; 0.25 mT ≈ 120 × 10−6 DF 25 °C; 10 kHz; 0.25 mT ≤ 4.5 × 10−6 αF +20 to 70 °C; ≤10 kHz; 0.25 mT DC, 25 °C (0 ±0.6) × 10−6 ≈1 ≥ 170 ≈ 4 800 ρ TC density MBW057 10 4 handbook, halfpage 10 10 1 1 10 f (MHz) 10 2 K−1 Ωm °C kg/m3 Fig.1 Complex permeability as a function of frequency. MBW058 5000 handbook, halfpage 3B7 µi MBW020 500 25oC 100oC handbook, halfpage 4000 B (mT) 3B7 400 3000 300 2000 200 1000 100 0 50 50 150 T ( o C) 250 0 25 0 25 50 150 250 H (A/m) Fig.2 2008 Sep 01 Initial permeability as a function of temperature. Fig.3 Typical B-H loops. 85 Ferroxcube Material specification 3B7 MBW077 4000 handbook, halfpage f = 10 kHz o T=25 C µp 3B7 3000 2000 0.2 µs 2 µs 1000 0.1 µs 1 µs 0.5 µs 0 0 100 200 300 400 B (mT) Fig.4 Pulse characteristics (unipolar pulses). 2008 Sep 01 86 Ferroxcube Material specification 3B7 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 87