A-20GV-B7-K Omron Automation, A-20GV-B7-K Datasheet - Page 6

• Manufacturer Part Number: A-20GV-B7-K
• Description: SWITCH, 20 AMP, HEAVY DUTY SWITCH, HINGE LEVER
• Manufacturer: Omron Automation
• Type: Basicr

Specifications of A-20GV-B7-K

• Actuator Type: Lever
• Brand/series: A-20 Series
• Contact Form: SPDT
• Current, Rating: 20 A
• Number Of Poles: 1
• Operating Force: 2.47 Oz.
• Operation: Snap Action
• Standards: UL Listed, CSA Certified
• Temperature, Operating: -25 to +80 °C
• Termination: Screw
• Voltage, Rating: 250 VAC
• Lead Free Status / Rohs Status: RoHS Compliant part

Safety Precautions
Be sure to read the precautions and information common to all Snap Action and Detection Switches, contained in the Technical User’s Guide,
“Snap Action Switches, Technical Information” for correct use.
Precautions for Safe Use
Terminal Connection
When soldering lead wires to the Switch, make sure that the capacity
of the soldering iron is 60 W maximum. Do not take more than 5 s to
solder any part of the Switch. The characteristics of the Switch will
deteriorate if a soldering iron with a capacity of more than 60 W is
applied to any part of the Switch for 5 s or more.
Operation
• Make sure that the switching frequency or speed is within the
1. If the switching speed is extremely slow, the contact may not be
2. If the switching speed is extremely fast, switching shock may
• Make sure that the actuator travel does not exceed the permissible
Precautions for Correct Use
Mounting Location
• Do not use the switch alone in atmospheres such as flammable or
• Switches are generally not constructed with resistance against
• Install the switch in a location that is not directly subject to debris
24
specified range.
OT position. The operating stroke must be set to 70% to 100% of
the rated OT.
explosive gases. Arcing and heat generation associated with
switching may cause fires or explosions.
water. Use a protective cover to prevent direct spraying if the switch
is used in locations subject to splashing or spurting oil or water,
dust adhering.
and dust from cutting. The actuator and the switch body must be
protected from accumulated cutting debris and dirt.
switched smoothly, which may result in a contact failure or contact
welding.
damage the Switch soon. If the switching frequency is too high,
the contact may not catch up with the speed.
The rated permissible switching speed and frequency indicate the
switching reliability of the Switch.
The life of a Switch is determined at the specified switching
speed. The life varies with the switching speed and frequency
even when they are within the permissible ranges. In order to
determine the life of a Switch model to be applied to a particular
use, it is best to conduct an appropriate durability test on some
samples of the model under actual conditions.
Incorrect
Snap Action Switch
Terminal box
Incorrect
A
Terminal box
Correct
Correct
• Do not use the switch in locations subject to hot water (greater than
• Do not use the switch outside the specified temperature and
• Mount a cover if the switch is to be installed in a location where
• Subjecting the switch to continuous vibration or shock may result in
• If silver contacts are used with relatively low frequency for a long
• Do not use the switch in atmospheres with high humidity or heat or
• The switch includes contacts. If the switch is used in an atmosphere
Panel-mounting model (A-20GQ@)
• If a Switch is side-mounted with screws, remove the hexagonal nut
• If a Switch is side-mounted and secured with screws, make sure
• If a Switch is panel-mounted, pay utmost attention to make sure
60°C) or in water vapor.
atmospheric conditions.
The permissible ambient temperature depends on the model.
(Refer to the specifications in this catalog.) Sudden thermal
changes may cause thermal shock to distort the switch and result
in faults.
worker inattention could result in incorrect operation or accidents.
contact failure or faulty operation due to abrasion powder and in
reduced durability. Excessive vibration or shock will cause the
contacts to operate malfunction or become damaged. Mount the
switch in a location that is not subject to vibration or shock and in a
direction that does not subject the switch to resonance.
time or are used with microloads, the sulfide coating produced on
the contact surface will not be broken down and contact faults will
result. Use a microload switch that uses gold contacts.
in harmful gases, such as sulfide gas (H
(NH
impair functionality, such as with damage due to contacting faults or
corrosion.
with silicon gas, arc energy may cause silicon oxide (SiO
accumulate on the contacts and result in contact failure. If there is
silicon oil, silicon filling, silicon wiring, or other silicon products in
the vicinity of the switch, use a contact protection circuit to limit
arcing and remove the source of the silicon gas.
of the actuator.
that the angle or speed of the actuating object is not excessively
large or too high, otherwise the Switch may be damaged.
that the actuating speed or OT distance is not excessively high or
large. Not doing so may damage the Switch.
Incorrect
3
Incorrect
), nitric acid gas (HNO
3
), or chlorine gas (Cl
(preventing malfunctions)
Correct
Correct
2
S, SO
2
2
), ammonia gas
). Doing so may
Separate the
installation lo-
cation from
heat sources.
2
) to