E3490-AL_13 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Common Mode Line Chokes

Document 141-1
Common Mode Line Chokes – EE Styles
• Low cost
• 3 mm creepage and clearance from all terminations to the
core
• 3750 Vrms, one minute isolation between windings
• UL1446 Class B (130°C) Insulation System (UL File E83628)
• Industry-standard EE25 size
• Wide range of available inductances and current ratings
Coilcraft Designer’s Kit No. P402 contains samples
of eight standard EE and toroidal common mode line
chokes. To order, contact Coilcraft or purchase on-line at
buy.coilcraft.com.
Coilcraft common mode standard packages incorporate
several features to help meet the requirements of major
safety agencies. These include 2 mm thick center flanges
and 3 mm creepage and clearance from all terminations
to the core.
Common mode chokes are used to reduce AC line con-
ducted interference produced by switching power supplies.
This configuration produces opposing magnetic fluxes in
the core that serve to cancel in-phase noise signals ap-
pearing across the AC line.
This mode allows much more filtering capability in a given
core size than would be possible using differential filtering
alone. Use of common mode chokes therefore reduces
component count as well as inductor size.
Combining both common and differential mode chokes
gives the power supply designer the added flexibility
required to adjust the filtering to meet FCC, VDE, and
other requirements as well as optimize the circuit for the
particular noise levels and frequencies produced by each
power supply design.
The Coilcraft packaging of common mode chokes allows
windings to be balanced within 1% and features the cost
effectiveness of standard EE core styles.
Schematic
2
4
9
7
Typical Application
2
4
AC
input
0.1 µF
0.005 µF
0.005 µF
9
7
0.1 µF
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China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 141-1  Revised 04/20/12
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.