OMRON A20GDB7K

Snap Action Switch
A
General-purpose Snap Action Switch
• High-capacity switch capable of handling 20 A loads with
large inrush currents
• Directly switches such loads as motors, halogen lamps and
solenoids
• Same shape as OMRON snap action switch model Z
except in pin plunger position, yet endures inrush currents
as large as 75 A.
Ordering Information
Terminal
Solder terminal
Screw terminal (-B)
Actuator
Model
Model
Pin plunger
A-20G
A-20G-B
Short spring plunger
A-20GD
A-20GD-B
Panel mount plunger
A-20GQ
A-20GQ-B
A-20GQ22
A-20GQ22-B
---
A-20GQ21-B
A-20GV21
A-20GV21-B
A-20GV
A-20GV-B
Short hinge roller lever
A-20GV22
A-20GV22-B
Hinge roller lever
A-20GV2
A-20GV2-B
Panel mount roller plunger
Panel mount cross roller plunger
Short hinge lever
Hinge lever
Model Number Legend
A - 20 G
1 2 3 4
1. Ratings
20: 20 A (250 VAC)
2. Contact Gap
G: 0.5 mm
3. Actuator
None: Pin plunger
D:
Short spring plunger
Q:
Panel mount plunger
Q21: Panel mount cross roller plunger
Q22: Panel mount roller plunger
V:
Hinge lever
V2:
Hinge roller lever
V21: Short hinge lever
V22: Short hinge roller lever
4. Terminals
None: Solder terminal
B:
Screw terminal
(with toothed washer)
Snap Action Switch
A
19
Specifications
■ Characteristics
Operating speed
0.01 mm to 1m/s (see note 1)
Operating frequency
Mechanical
240 operations/min
Electrical
20 operations/min
Contact resistance
15 mΩ max. (initial value)
Insulation resistance
100 MΩ min. (at 500 VDC)
Dielectric strength
1,000 VAC, 50/60 Hz for 1 min between terminals of the same polarity
2,000 VAC, 50/60 Hz for 1 min between the current-carrying metal parts and the ground, and
between each terminal and non-current-carrying metal parts
Vibration resistance
Malfunction
Shock resistance
Destruction
10 to 55 Hz, 1.5-mm double amplitude (See note 2)
1,000 m/s2 max.
Malfunction
300 m/s2 max. (See notes 1 and 2)
Degree of protection
IP00
Degree of protection against electric shock
Class I
Proof tracking index (PTI)
175
Ambient operating temperature
− 25°C to 80°C (with no icing)
Ambient operating humidity
35% to 85%RH
Service life
Mechanical
1,000,000 operations min.
Electrical
500,000 operations min.
Weight
Approx. 22 to 58 g
Note: 1. The value is for the pin plunger.
2. Malfunction: 1 ms max.
■ Operating Characteristics
Characteristics
A-20G-B
A-20GD-B
OF
RF min.
A-20GV21-B
A-20GV-B
A-20GV22-B
A-20GV2-B
400 to 625 g
A-20GQ-B
630 g max.
160 g
70 g
160 g
90 g
285 g
280g
42 g
14 g
42 g
14 g
6.5 mm
15.9 mm
6.3 mm
12 mm
2.4 mm
PT max.
A-20GQ22-B
A-20GQ21-B
1.3 mm
OT min.
0.25 mm
3 mm
MD max.
5.6 mm
3.58 mm
1.2 mm
4 mm
1.2 mm
0.35 mm
1.2 mm
2.4 mm
1.2 mm
2.2 mm
33.4±1.2 mm
19±0.8 mm
19±0.8 mm
29.8±0.8 mm
30.2±0.8 mm
0.2 mm
OP
16.3±0.4 mm
26.2±0.5 mm
21.8±0.8 mm
■ Ratings
Non-inductive load (A)
Rated voltage
(V)
Resistive load
NC
NO
125 VAC
250 VAC
500 VAC
20
20
15
8 VDC
14 VDC
30 VDC
125 VDC
250 VDC
20
20
6
0.5
0.25
Inductive load (A)
Lamp load
NC
Inductive load
NO
NC
7.5
7.5
4
3
3
3
0.5
0.25
Note: 1. The above values are for steady-state current.
2. Inductive load has a power factor of 0.4 min. (AC) and a time
constant of 7 ms max. (DC).
3. Lamp load has an inrush current of 10 times the steady-state current.
■ Contact Specification
1.5
1.5
1.5
0.5
0.25
Motor load
NO
NC
NO
20
20
10
12.5
8.3
2
20
15
5
0.05
0.03
12.5
12.5
5
0.05
0.03
4. Motor load has an inrush current of 6 times the steady-state current.
5. The ratings values apply under the following test conditions:
(1) Ambient temperature: 20±2°C
(2) Ambient humidity: 65±5%RH
(3) Operating frequency: 20 operations/min
■ Safety Standards Ratings
UL/CSA (General ratings only)
Contacts
Shape
Rivet
Material
Silver alloy
Gap (standard value)
Inrush current
20
0.5 mm
NC
75 A max.
NO
75 A max.
Snap Action Switch
A
Rated voltage
A-20G
125 VAC
1 HP and 10 A "L" (Tungsten)
250 VAC
2 HP
480 VAC
20 A
125 VDC
0.5 A
250 VDC
0.25 A
Engineering Data
1,000
700
Ambient temperature: 20 ±2 °C
Ambient humidity: 65 ±5%RH
Without load
Operating frequency:
240 operations/min
500
300
100
■ Electrical Durability (A-20G)
Durability (x10 4 operations)
Durability (x10 4 operations)
■ Mechanical Durability (A-20G)
1,000
700
300
70
50
50
30
30
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7 0.8
125 VAC, cosφ = 1
125 VAC,
cosφ = 0.4
250 VAC,
cosφ = 1
100
70
10
Ambient temperature: 20 ±2 °C
Ambient humidity: 65 ±5%RH
Operating frequency:
20 operations/min
500
250 VAC, cosφ = 0.4
10
0
5
10
15
20
25
Switching current (A)
Overtravel (mm)
■ Structure
Contact Form (SPDT)
COM
NC
NO
Dimensions
Note: Unless otherwise specified, all units are in millimeters and a tolerance of ± 0.4 mm applies to all dimensions.
■ Terminals
Screw Terminals (-B)
Solder Terminal (Blank)
6.4
9.2
20
25.4±0.1
20
11.9
17.45±0.2
17.45±0.2
3
COM
1
NO
NC
3
2
49.2
1 NO
COM
NC
2
Three, M4 × 5.5
Terminal screws
(with toothed washer)
49.2
Note: Appropriate terminal screw tightening torque: 0.78 to 1.18 N·m.
■ Mounting Holes
All switches can be mounted using M4 mounting screws with plane
washers or spring washers to securely mount the Switch. Tighten the
screws to a torque of 1.18 to 1.47 N·m.
Two, 4.2 dia. mounting
holes or M4
Versions with panel mount plungers can be panel mounted via the
plunger, provided that the hexagonal nut of the actuator is tightened
to a torque of 2.94 to 4.9 N·m.
Panel Mount Plunger
12.5
Panel Mount Roller Plunger
+ 0.2
0 dia.
12.5
+ 0.2
0 dia.
25.4±0.1
5 + 0.2
0
13 + 0.2
0
Note: Mount using either the side mounting holes or the panel mount plunger, not both. If using the side mounting holes, then remove the hexagonal nut(s)
from the panel mount plunger.
Accessories (Terminal Covers, and Separators): Refer to ‘Z/A/X/DZ Common Accessories’ datasheet
Snap Action Switch
A
21
Note: 1. All drawings show the switches with screw terminals. For solder terminals, remove the “-B” from the end of the part number
2. Unless otherwise specified, all units are in millimeters and a tolerance of ± 0.4 mm applies to all dimensions.
Pin Plunger
19.05±0.25
PT
A-20G-B
2.3 dia.
4.2 +0.075
−0.025 dia. hole
2.3SR *
OP
24.2
9.2
4.2 +0.075
−0.025 dia.
4.36 +0.1
−0.05dia.
11.9
25.4±0.1
49.2
17.45±0.2
* Stainless-steel plunger
Short Spring Plunger
15 dia.
A-20GD-B
11.2 dia.
7.15
11.9SR *
dia.
PT
19.05±0.25
7.5
OP
24.2
* Stainless-steel plunger
Panel Mount Plunger
PT
19.05±0.25
8.35 dia.
11.9SR *1
Note: Do not use both M12
mounting screw and
mounting holes at the
Two hexagon nuts
same time.
(2 t × 14 width across flats)
M12 × 1 mounting screw
A-20GQ-B
OP
13.1
*2
16.3
16 dia.
Two lock nuts
(2 t × 15.6 width across flats)
*1 Stainless-steel plunger
*2 Incomplete screw part with a maximum length of 1.5 mm.
Panel Mount Roller Plunger
A-20GQ22-B
19.05±0.25
PT
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
OP
M12 × 1 mounting screw
15.5
*2
16.3
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
16 dia.
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
Panel Mount Cross Roller Plunger
A-20GQ21-B
19.05±0.25
PT
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
OP
15.5
M12 × 1 mounting screw
*2
16.3
16 dia.
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
22
Snap Action Switch
A
Note: 1. All drawings show the switches with screw terminals. For solder terminals, remove the “-B” from the end of the part number
2. Unless otherwise specified, all units are in millimeters and a tolerance of ± 0.4 mm applies to all dimensions.
Short Hinge Lever
24.56±0.25
A-20GV21-B
t=1*
.3R
28
4.9
PT
20.2 17.9
14.7 OP
* Stainless-steel lever
Hinge Lever
24.56±0.25
A-20GV-B
5R
63.
PT
t=1*
20.2 17.9
4.9
14.7 OP
* Stainless-steel lever
24.56±0.25
Short Hinge Roller Lever
9.5 dia. × 4
(plastic roller)
t=1*
PT
26
.2
R
A-20GV22-B
OP
20.2 17.9
14.7
* Stainless-steel lever
Hinge Roller Lever
9.5 dia. × 4
(plastic roller)
24.56±0.25
PT
A-20GV2-B
.4R
48
t=1*
OP
20.2 17.9
14.7
* Stainless-steel lever
Snap Action Switch
A
23
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
• Do not use the switch in locations subject to hot water (greater than
60°C) or in water vapor.
• Do not use the switch outside the specified temperature and
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.
Incorrect
Correct
• Make sure that the switching frequency or speed is within the
specified range.
1. If the switching speed is extremely slow, the contact may not be
switched smoothly, which may result in a contact failure or contact
welding.
2. If the switching speed is extremely fast, switching shock may
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.
• Make sure that the actuator travel does not exceed the permissible
OT position. The operating stroke must be set to 70% to 100% of
the rated OT.
Precautions for Correct Use
Mounting Location
• Do not use the switch alone in atmospheres such as flammable or
explosive gases. Arcing and heat generation associated with
switching may cause fires or explosions.
• Switches are generally not constructed with resistance against
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.
Incorrect
Terminal box
Correct
Terminal box
• Install the switch in a location that is not directly subject to debris
and dust from cutting. The actuator and the switch body must be
protected from accumulated cutting debris and dirt.
Incorrect
24
Snap Action Switch
Correct
A
Separate the
installation location from
heat sources.
• Mount a cover if the switch is to be installed in a location where
worker inattention could result in incorrect operation or accidents.
Correct
Incorrect
(preventing malfunctions)
• Subjecting the switch to continuous vibration or shock may result in
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.
• If silver contacts are used with relatively low frequency for a long
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.
• Do not use the switch in atmospheres with high humidity or heat or
in harmful gases, such as sulfide gas (H2S, SO2), ammonia gas
(NH3), nitric acid gas (HNO3), or chlorine gas (Cl2). Doing so may
impair functionality, such as with damage due to contacting faults or
corrosion.
• The switch includes contacts. If the switch is used in an atmosphere
with silicon gas, arc energy may cause silicon oxide (SiO2) to
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.
Panel-mounting model ([email protected])
• If a Switch is side-mounted with screws, remove the hexagonal nut
of the actuator.
• If a Switch is side-mounted and secured with screws, make sure
that the angle or speed of the actuating object is not excessively
large or too high, otherwise the Switch may be damaged.
• If a Switch is panel-mounted, pay utmost attention to make sure
that the actuating speed or OT distance is not excessively high or
large. Not doing so may damage the Switch.
MEMO
Snap Action Switch
A
All sales are subject to Omron Electronic Components LLC standard terms and conditions of sale, which
can be found at http://www.components.omron.com/components/web/webfiles.nsf/sales_terms.html
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
OMRON ON-LINE
OMRON ELECTRONIC
COMPONENTS LLC
Global - http://www.omron.com
USA - http://www.components.omron.com
55 E. Commerce Drive, Suite B
Schaumburg, IL 60173
847-882-2288
Cat. No. X303-E-1
11/10
Snap Action Switch
A
Specifications subject to change without notice
Printed in USA