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.
2.3 dia.
19.05 0.25
Pin Plunger
+0.075
PT
4.2
dia. hole
−0.025
2.3SR *
A-20G-B
OP
4.2
24.2
9.2
+0.075
dia.
−0.025
+0.1
4.36
dia.
−0.05
17.45 0.2
11.9
25.4 0.1
49.2
* Stainless-steel plunger
15 dia.
Short Spring Plunger
11.2 dia.
7.15
dia.
A-20GD-B
19.05 0.25
PT
11.9SR *
7.5
OP
24.2
* Stainless-steel plunger
8.35 dia.
PT
19.05 0.25
11.9SR *1
Panel Mount Plunger
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
M12 × 1 mounting screw
A-20GQ-B
Two hexagon nuts
OP
(2 t × 14 width across flats)
Two lock nuts
(2 t × 15.6 width across flats)
*2
13.1
16 dia.
16.3
*1 Stainless-steel plunger
*2 Incomplete screw part with a maximum length of 1.5 mm.
Panel Mount Roller Plunger
19.05 0.25
A-20GQ22-B
PT
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
OP
M12 × 1 mounting screw
15.5
*2
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
16 dia.
16.3
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
Panel Mount Cross Roller Plunger
19.05 0.25
A-20GQ21-B
PT
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
OP
M12 × 1 mounting screw
15.5
*2
Note: Do not use both M12
mounting screw and
mounting holes at the
same time.
16 dia.
16.3
*1 Stainless-steel roller
*2 Incomplete screw part with a maximum length of 1.5 mm.
22
Snap Action Switch A
OMRON [ OMRON ELECTRONICS LLC ]
