EZJPZV6R8GANIL Datasheet, PDF (13/13 Pages) Panasonic Semiconductor – Multilayer Varistors

Multilayer Varistors
The following figures are for your reference to
avoid bending the PC board.
Bending of
PC board
Prohibited setting
Check pin
Recommended setting
Check pin
Separated, Crack
Supporting pin
8. Protective Coating
When the surface of a PC board on which the Varistors
have been mounted is coated with resin to protect
against moisture and dust, it shall be confirmed that the
protective coating which is corrosive or chemically active
is not used, in order that the reliability of the Varistors in
the actual equipment may not be influenced. Coating
materials that expand or shrink also may lead to damage
to the Varistor during the curing process.
9. Dividing/Breaking of PC Boards
(1) Abnormal and excessive mechanical stress such as
bending or torsion shown below can cause cracking
in the Varistors.
Bending
Torsion
Prohibited dividing
Loading
point
Loading direction
PC
board
Chip
component
V-groove
Recommended dividing
PC
board
V-groove
Chip component
Loading direction
Loading
point
9. Mechanical Impact
(1) The Varistors shall be free from any excessive
mechanical impact. The Varistor body is made of
ceramics and may be damaged or cracked if
dropped.
Never use a Varistor which has been dropped; their
quality may be impaired and failure rate increased.
(2) When handling PC boards with Varistors mounted
on them, do not allow the Varistors to collide with
another PC board.
When mounted PC boards are handled or stored in
a stacked state, impact between the corner of a PC
board and the Varistor may cause damage or
cracking and can deteriorate the withstand voltage
and insulation resistance of the Varistor.
(2) Dividing/Breaking of the PC boards shall be done
carefully at moderate speed by using a jig or
apparatus to prevent the Varistors on the boards
from mechanical damage.
(3) Examples of PCB dividing/breaking jigs:
The outline of PC board breaking jig is shown
below.
When PC board are broken or divided, loading
points should be close to the jig to minimize the
extent of the bending.
Also, planes with no parts mounted on should be
used as plane of loading, which generates a
compressive stress on the mounted plane, in order
to prevent tensile stress induced by the bending,
which may cause cracks of the Varistors or other
parts mounted on the PC boards.
PC board
Outline of Jig
V-groove
■Other
The various precautions described above are typical.
For special mounting conditions, please contact us.
PC board
splitting jig
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
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