A-20G Datasheet, PDF (4/8 Pages) Omron Electronics LLC – Snap Action Switch

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
A-20G-B
PT
OP
4.2
+0.075
−0.025
dia.
19.05±0.25
4.2
+0.075
−0.025
dia.
hole
2.3 dia.
2.3SR *
4.36 ⁺−^00..105dia.
25.4±0.1
11.9
49.2
24.2
9.2
17.45±0.2
* Stainless-steel plunger
Short Spring Plunger
A-20GD-B
19.05±0.25
PT
OP
15 dia.
11.2 dia.
7.15
dia. 11.9SR *
7.5
24.2
* Stainless-steel plunger
Panel Mount Plunger
A-20GQ-B
PT
OP
13.1 ^*2
16.3
19.05±0.25
16 dia.
8.35 dia.
11.9SR *1
Note: Do not use both M12
M12 × 1 mounting screw
mounting screw and
Two hexagon nuts
(2 t × 14 width across flats)
mounting holes at the
same time.
Two lock nuts
(2 t × 15.6 width across flats)
Panel Mount Roller Plunger
A-20GQ22-B
PT
19.05±0.25
OP
15.5 *2
16.3
16 dia.
Panel Mount Cross Roller Plunger
A-20GQ21-B
PT
19.05±0.25
OP
15.5 *2
16.3
16 dia.
*1 Stainless-steel plunger
*2 Incomplete screw part with a maximum length of 1.5 mm.
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
M12 × 1 mounting screw
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.
12.7 dia. × 4.8 *1
Two hexagon nuts
(3 t × 17 width across flats)
M12 × 1 mounting screw
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