A-20G-B Omron, A-20G-B Datasheet - Page 3

• Manufacturer Part Number: A-20G-B
• Description: BASIC SWITCH
• Manufacturer: Omron
• Series: Ar

Specifications of A-20G-B

• Circuit: SPDT
• Switch Function: On-Mom
• Contact Rating @ Voltage: 20A @ 125VAC
• Actuator Type: Round (Pin Plunger)
• Mounting Type: Chassis Mount
• Termination Style: Screw Terminal
• Operating Force: 625gf
• Microswitch Type: Snap Action
• Actuator Style: Pin Plunger
• Operating Force Max: 625gf
• Contact Voltage Ac Nom: 500V
• Contact Voltage Dc Nom: 250V
• Contact Current Max: 20A
• Switch Terminals: Screw
• Contact Form: SPDT
• Contact Rating: 20 Amps at 250 Volts
• Actuator: Plunger, Pin
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: A20GB

Dimensions and Operating Characteristics
The models, illustrations, and graphics are for screw-terminal models. (The dimensions for models that are omitted here are the same as for pin-plunger models.)
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Pin Plunger
A-20G-B
Short Spring Plunger
A-20GD-B
Panel Mount Plunger
A-20GQ-B
Panel Mount Roller Plunger
A-20GQ22-B
Panel Mount Cross Roller Plunger
A-20GQ21-B
Operating Characteristics
Operating force
Release force
Pretravel
Over Travel
Movement differential
Operating Position
OF
RF min.
PT max.
OT min.
MD max.
OP
Model
3.92 to 6.13 N
16.3±0.4 mm
PT
OP
PT
OP
PT
OP
A-20G-B
0.25 mm
1.3 mm
0.2 mm
2.79 N
13.1
15.5
15.5
PT
OP
4.2
+0.075
−0.025
16.3
16.3
16.3
OP
PT
*2
*2
*2
dia.
16 dia.
16 dia.
16 dia.
4.36
3.92 to 6.13 N
19.05±0.25
19.05±0.25
25.4±0.1
19.05±0.25
19.05±0.25
19.05±0.25
26.2±0.5 mm
49.2
A-20GD-B
+0.1
1.3 mm
0.2 mm
−0.05
2.79 N
3 mm
dia.
11.9
4.2
+0.075
−0.025
dia. hole
*1 Stainless-steel plunger
*2 Incomplete screw part with a maximum length of 1.5 mm.
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
3.92 to 6.13 N
21.8±0.8 mm
A-20GQ-B
1.3 mm
5.6 mm
0.2 mm
2.79 N
* Stainless-steel plunger
17.45±0.2
8.35 dia.
11.2 dia.
2.3 dia.
15 dia.
7.15
dia.
2.3SR *
12.7 dia. × 4.8 *1
11.9SR *
11.9SR *1
12.7 dia. × 4.8 *1
M12 × 1 mounting screw
* Stainless-steel plunger
24.2
Two hexagon nuts
(3 t × 17 width across flats)
7.5
M12 × 1 mounting screw
M12 × 1 mounting screw
Two hexagon nuts
(3 t × 17 width across flats)
9.2
Two hexagon nuts
(2 t × 14 width across flats)
Two lock nuts
(2 t × 15.6 width across flats)
24.2
A-20GQ22-B
33.4±1.2 mm
6.18 N max.
3.58 mm
0.35 mm
1.3 mm
2.75 N
Note: Do not use both M12
Note: Do not use both M12
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
mounting screw and
mounting holes at the
same time.
mounting screw and
mounting holes at the
same time.
A-20GQ21-B
33.4±1.2 mm
6.18 N max.
3.58 mm
0.35 mm
1.3 mm
2.75 N
A
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