B66457PX187 EPCOS Inc, B66457PX187 Datasheet - Page 6
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B66457PX187
Manufacturer Part Number
B66457PX187
Description
Manufacturer
EPCOS Inc
Datasheet
1.B66457PX187.pdf
(7 pages)
Specifications of B66457PX187
Lead Free Status / RoHS Status
Compliant
Cautions and warnings
Mechanical stress and mounting
Ferrite cores have to meet mechanical requirements during assembling and for a growing number
of applications. Since ferrites are ceramic materials one has to be aware of the special behavior
under mechanical load.
As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing
or tensile load. Especially high cooling rates under ultrasonic cleaning and high static or cyclic loads
can cause cracks or failure of the ferrite cores.
For detailed information see Data Book 2007, chapter “Definitions”, section 8.1.
Effects of core combination on A
Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent
that the initial permeability is dependent on the stress state of the core. The higher the stresses are
in the core, the lower is the value for the initial permeability. Thus the embedding medium should
have the greatest possible elasticity.
For detailed information see Data Book 2007, chapter “Definitions”, section 8.2.
Heating up
Ferrites can run hot during operation at higher flux densities and higher frequencies
NiZn-materials
The magnetic properties of NiZn-materials can change irreversible in high magnetic fields
Processing notes
Please read Cautions and warnings and
Important notes at the end of this document.
The start of the winding process should be soft. Else the flanges may be destroid.
To strong winding forces may blast the flanges or squeeze the tube that the cores can no more
be mount.
To long soldering time at high temperature ( 300 °C) may effect coplanarity or pin arrangement.
Not following the processing notes for soldering of the J-leg terminals may cause solderability
problems at the transformer because of pollution with Sn oxyd of the tin bath or burned insulation
of the wire. For detailed information see Data Book 2007, chapter “Processing notes”, section
2.2.
The dimensions of the hole arrangement have fixed values and should be understood as a rec-
ommendation for drilling the printed circuit board. For dimensioning the pins, the group of holes
can only be seen under certain conditions, as they fit into the given hole arrangement. To avoid
problems when mounting the transformer, the manufacturing tolerances for positioning the cus-
tomers' drilling process must be considered by increasing the hole diameter.
L
value
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09/06