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C-6
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Technical Guide for Pushbutton Switches
•
Do not place PCBs that have had flux applied or have been
soldered on top of each other. Otherwise, the flux on the PCBs
solder surface may stain the upper part of the Switch or even
permeate the inside of the Switch and cause contact failure.
Be sure to insert a special PCB stocker.
•
When performing soldering with a dip soldering bath, ensure that
the flux does not reach a higher level than the PCB.
•
Flux is especially likely to rise up at the edges of the PCB. If the
Switch is mounted near the edge of the PCB, create a gap between
the edge by using a split PCB, and insert the PCB in the soldering
bath so that the edge that is farthest from the Switch enters the bath
first.
Storage
•
When the Switch is left unused or stored for long periods, the
ambient conditions can have a great effect on the condition of the
Switch. In certain environments, leaving the Switch exposed may
result in deterioration (i.e., oxidation, or the creation of an oxide
film) of the contacts and terminals, causing the contact resistance
to increase, and making it difficult to solder the lead wires.
Therefore, store in a well-ventilated room, inside, for example, a
non-hygroscopic case, in a location where no corrosive gases are
present.
•
If the Switch is stored in a location where it will be exposed to direct
light, colored resin in the colored plate may fade. Therefore, do not
store the Switch in locations where it will be exposed to direct light.
Flux
Do not place PCBs
with solder or flux on
top of each other.
Create distance
Split PCB
Create distance
Insert in soldering
bath from this
edge.
Flux is more likely
to rise at the edges.
