FERROXCUBE
DATA SHEET
E40/27/12
EI cores
Supersedes data of September 2004 2008 Sep 01
Ferroxcube
EI cores E40/27/12
CORES
Effective core parameters of an E / I combination handbook, halfpage 40.2 ± 0.7
29 ± 0.5
SYMBOL PARAMETER VALUE UNIT
11.85
Σ(I/A) core factor (C1) 0.542 mm −1 ± 0.35
Ve effective volume 11100 mm 3 handbook, halfpage
20.25
Ie effective length 77.5 mm ± 0.25 27.25
Ae effective area 143 mm 2 ± 0.25
Amin minimum area 133 mm 2
m mass of E core ≈ 42 g
m mass of I core ≈ 17 g
Ordering information for I cores 11.85 ± 0.35
GRADE TYPE NUMBER MFP098
3C90 I40/7.5/12-3C90
Dimensions in mm.
Fig.1 E40/27/12 core.
handbook, halfpage 11.85
40.2 ± 0.7
± 0.35
7.5
± 0.3
MFP099
Dimensions in mm.
Fig.2 I40/7.5/12.
Core halves for use in combination with an I core
AL measured in combination with an I core, clamping force for AL measurements 40 ± 20 N;
AL AIR GAP
GRADE µe TYPE NUMBER
(nH) (µm)
3C90 4110 ± 25 % ≈ 1770 ≈0 E40/27/12-3C90
Properties of core sets under power conditions
B (mT) at CORE LOSS (W) at
GRADE H = 250 A/m; f = 25 kHz; f = 100 kHz;
f = 25 kHz; ˆ = 200 mT;
B B̂ =100 mT;
T = 100 °C T = 100 °C T = 100 °C
E40/27/12+I40/7.5/12-3C90 ≥ 330 ≤ 1.3 ≤ 1.3
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Ferroxcube
EI cores E40/27/12
DATA SHEET STATUS DEFINITIONS
DATA SHEET PRODUCT
DEFINITIONS
STATUS STATUS
Preliminary Development This data sheet contains preliminary data. Ferroxcube reserves the right to
specification 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
These are products that have been made as development samples for the purposes of
Prototype technical evaluation only. The data for these types is provisional and is subject to
change.
Design-in These products are recommended for new designs.
These products are recommended for use in current designs and are available via our
Preferred
sales channels.
These products are not recommended for new designs and may not be available
Support
through all of our sales channels. Customers are advised to check for availability.
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