Business > Industrial Devices > Automation Controls Top > Components & Devices > Switches > Light Touch Switches > Light Touch Switches Lineup > 5N Type Side-operational (EVQPF) > Cautions For Use
To Be Discontinued
|
When using our Light Touch Switches, please observe the following items ("prohibited items") and be cautious of the following in order to prevent dangerous accidents and deterioration of performance.
The following shall be described for safety precaution:
[Limitation of Application]
(a) This product has been designed and manufactured for
general electronic devices, such as home electronics, office
equipment, information devices and communication devices.
(b) Regardless of its applications, in an event that this product is used for equipment with high safety standards, protective circuits or back up circuits must be used and safety tests must be performed.
When performing reflow soldering using a hot-air oven or an
infrared oven, please follow the recommended reflow soldering
conditions in the product specification sheet for each
product. Since the temperature applied to a switch and its
terminals varies with the type and size of the PWB and the
mounting density of the parts, sufficiently check the conditions
in advance.
Please do not apply any coating material to the switch after
reflow soldering.
Please do not touch them until the switch and PCB get back to
their normal temperature after reflow soldering.
There is a possibility the flux from solder paste infiltrates into
the body if plenty of solder paste was applied by switch on the
P.W.B.
So we recommend to use our proposed land design and
solder thickness in order to prevent above problem.
Also please avoid putting additional land by the switch on the
P.W.B
We selected our recommended solder paste whose flux
doesn't intrude easily, based on our experience and evaluation
result of the paste.
Please choose a solder paste wisely by paying attention to
solderability and flux's osmosis/spread.
Be careful not to apply excess heat to switch to prevent
deformation/characteristics deterioration/peel off at reworking
on switch mounted PCB.
Please follow the rework conditions in the delivery specification.
When performing dip soldering, comply with the recommended
dip soldering conditions in the product specification
sheet for each product. Do not wash the switch after solder
dipping because flux may enter the switch, resulting in contact
failure. Avoid use of jumper cables near the switches because
flux may attach to them.
If processing double-sided through-hole boards, because of
the risk of switch cases melting, avoid designs with throughholes
located just under the switch case.
Please be cautions not to give excessive static load or shock
to switches.
Please be careful not to pile up P.W.B. after switches were
soldered.
For switch mounting hole, see PWB mounting hole reference
diagrams shown in “Dimensions”. For shapes of operating
parts in a set, refer to recommended shapes described in
"Product Specifications for Information". We recommend to
use harder material such as resin for key top,and we do not
recommend softer material such as rubber may affect operation
feeling. However in case if you still would like to use softer
material,please consult with us beforehand. Operation feeling
may deteriorate in case operation angle for set knob and the
amount of eccentricity are out of our recommended range.
Please design set knob within the range of our recommendation
for the angle and the amount.
When designing set assemblies ensure that neither overloading
nor impacts are applied to the push board of the switch
during the assembly process.
Do not store the switches under high temperatures and/or high humidity, or in a location where corrosive gas may be generated. Store the switches at room temperature and room humidity in a packed condition. Use them within a maximum of 6 months after delivery. Check the date of manufacture on the package box and apply the "first-in-first-out" rule. When a package box is opened, for protection against the external atmosphere, temporarily store remaining inventory items in polyethylene bags or containers.
Avoid pressing the film portion of the product with sharpedged object. Avoid the use of the switch under pushed ON condition is continued for a long time.
IP67
Switch shall not be operated during test. Water or dust ingress
shall be limited enough to prevent deleterious effect to the
switch function. However, IP67 shall be guaranteed under
single product state, then there is a possibility that IP67 performance
become impaired depending on your mounting
condition or usage. So, please ask us in advance, if the switch
is applied to important usage for water and dust resistant.
•Absolutely avoid use of a switch beyond its rated range because doing so may cause a fire. If misuse or abnormal use may result in conditions in which the switch is used out of its rated range, take proper measures such as current interruption using a protective circuit.
•The grade of nonflammability for resin used in Light Touch Switches is "94HB", which is based on UL94 Standards (flammability test for plastic materials). Prohibit use in a location where a spread ing fire may be generated or prepare against a spreading fire.
Although care is taken to ensure switch quality, variation of
contact resistance (increase), short circuits, open circuits,
and temperature rise are some problems that might be
generated. To design a set which places maximum emphasis
on safety, review the affect of any single fault of a switch
in advance and perform virtually fail-safe design to ensure
maximum safety by:
1.preparing a protective circuit or a protective device to
improve system safety, and
2.preparing a redundant circuit to improve system safety so
that the single fault of a switch does not cause a dangerous
situation.
Requests to customers (Automation Control Components & Industrial Device) [Excluding specific product]
Requests to customers (Automation Control Components & Industrial Device) [For specific product]
Requests to customers (FA Sensors & Components [Excluding motors])
Requests to customers (Dedicated to industrial motors)