3R1 FERROXCUBE | Alldatasheet

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Supersedes data of September 2004 2008 Sep 01 FERROXCUBE 3R1 Material specification

2008 Sep 01 200

Material specification 3R1 3R1 SPECIFICATIONS MnZn ferrite with a nearly rectangular hysteresis loop for use in magnetic regulators/amplifiers. SYMBOL CONDITIONS VALUE UNIT µi 25 °C; ≤10 kHz; 0.25 mT 800 ±20% B2 5 °C; 10 kHz;

1200 A/m

≈ 410 mT 100 °C; 10 kHz; ≈ 340 Br from 1 kA/m; 25 °C ≥ 310 mT from 1 kA/m; 100 °C ≥ 220 Hc from 1 kA/m; 25 °C ≤ 52 A/m from 1 kA/m; 100 °C ≤ 23 ρ DC; 25 °C ≈ 103 Ωm TC ≥ 230 °C density ≈ 4700 kg/m 3 Fig.1 Complex permeability as a function of frequency. handbook, halfpage MBW061 11 0 1 0 2 10 4 f (MHz) µ' ,s µ''s 10 3 10 2 10 1 3R1 µ''s µ' s Fig.2 Initial permeability as a function of temperature. handbook, halfpage5000 50 50 250 MBW062 150 1000 2000 3000 4000 µ i T ( C)o 3R1 Fig.3 Typical B-H loops. handbook, halfpage500 MBW018 100 200 300 400 B (mT) 3R1 25oC 100oC 50 500 50 10001000 H (A/m)

2008 Sep 01 201

Material specification 3R1 Fig.4 Specific power loss as a function of peak flux density with frequency as a parameter. handbook, halfpage MBW001 102 103 B (mT)11 0 10 4 Pv (kW/m )3 3R1 10 2 10 3

1 MHz

Fig.5 Specific power loss for several frequency/flux density combinations as a function of temperature. handbook, halfpage 04 0 8 0 800 600 200 400 MBW002 120T ( C) Pv (kW/m )3 3R1 o f (kHz) B (mT) 100 100 30 200 10 200 Remark: When 3R1 ring cores are driven exactly at their natural mechanical resonant frequencies a magneto-elastic resonance will occur. With large flux excursions and no mechanical damping, amplitudes can become so high that the maximum tensile stress of the ferrite is exceeded. Cracks or even breakage of the ring core could be the result. It is advised not to drive the toroidal cores at their radial resonant frequencies or even subharmonics (e.g. half this resonant frequency). Resonant frequencies can be calculated for any ring core with the following simple formula: where: f = radial resonant frequency (kHz) D o = outside diameter (mm) Di = inside diameter (mm). fr 5700 π Do Di+

2008 Sep 01 202

Material specification 3R1 DATA SHEET STATUS DEFINITIONS 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 DATA SHEET STATUS PRODUCT STATUS DEFINITIONS Preliminary specification Development This data sheet contains prelimin ary 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. 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.