CM Choke E/EF 2507

CM Choke E/EF 2507
Common Mode Chokes / Line Filters > E/EF Core Type

CM Choke E/EF 2507

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GENERAL INFORMATION ::
A common mode choke is an electrical filter that blocks high frequency noise common to two or more data or power lines while allowing the desired DC or low-frequency signal to pass. Common mode (CM) noise current is typically radiated from sources such as unwanted radio signals, unshielded electronics, inverters and motors. Left unfiltered, this noise presents interference problems in electronics and electrical circuits.
 
Common mode chokes have the two or more windings arranged such that the common mode current creates a magnetic field that opposes any increase in common mode current. This is similar to how single line (differential) inductors function. Inductors create magnetic fields that oppose changes in current. In common mode, the current in a group of lines travels in the same direction so the combined magnetic flux adds to create an opposing field to block the noise, as illustrated by the red and green arrows in the toroid core shown in figure below. In differential mode, the current travels in opposite directions and the flux subtracts or cancels out so that the field does not oppose the normal mode signal.
 
TYPICAL CHARATERSTICS ::
Magnetics Shielding             :   Good
Cost of Core                        :   Low
Cost of Winding & Assembly  :   High
Heat Dissipation                   :   Very Good
Uniform Cross Section           :   Yes
 
APPLICATIONS ::
  Switch Mode Power Supplies (SMPS)
  DC-DC Converters
  RFI / EMI Filtering
 
CORE DETAILS ::
 Core Size
 E/EF 2507
 Core Base Material
 MnZn
 Core Le
 57.5mm
 Core Ae
 52.5mm2
 Mounting
 Pin Through Hole
 Package Height
 21mm (typ)
 Package Length
 26.5mm (typ)
 Package Width
 26.5mm (typ)
 


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