Pushbutton Switches

PART1 General Knowledge

PART2 OMRONSwitches

PART2OMRON Switches

PART1General Knowledge

Pushbutton Switches

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Definition

Pushbutton Switches operate via a pushing or pulling action that moves the operating part in the direction of the force required to open or close the contacts.
The operating part is generally equipped with an incandescent lamp or LED to provide illumination and status indication.

Features

Status Indication By adding illumination and status indication to the switch, the user can get visual feedback on the operation input they make.
Rich Product Variations Pushbutton Switches are used in a wide variety of applications from miniature devices to large-scale equipment, and therefore come in a rich selection of sizes, specifications and functions.

Pushbutton Switches are used in a wide variety of devices, and therefore our product lineup includes an extremely large number of different items to meet those needs.

Models

Pushbutton Switches come in round and rectangular bodies.
Round Pushbuttons are inserted into a circular hole on the mounting surface. The product series are categorized by the diameter of that mounting hole.
Each product series includes a variety of products based on the color, illumination and shape of the operating part.
We can also provide other items that might be mounted on the same panel, such as Indicators, Selectors and Buzzers.

Round Pushbutton Switch Variations
Buzzers      
M2BJ		      
Key Selectors      
A165K		  
A22K		  
Knob Selectors (Illuminated and Non-illuminated)      
A165S/W		  
A22		  
Indicators
M2D		  
M2C
M16		  
M22		  
Pushbutton Switches (Illuminated and Non-illuminated)
A3D
VAQ

A2A
A3C
A16
VAP
A22
ZAP
Mounting hole diameter (mm) 8 10.5 12 16 16.5 22 30

  • Small  For Commercial Devices

  • For Industrial Equipment and Facilities  Large

Rectangular Pushbutton series are categorized by their external size.
Each product series includes a variety of products based on the color, illumination and illumination method of the operating part.
We have also added indicator lamps commonly mounted on the same panel to our lineup.

Square Pushbutton Switch Variations
Indicators

M2S

M2K
(Short-body Types)

M2S

M2K
(Short-body Types)
M2P
 
M2P
 
Pushbutton Switches (Illuminated and Non-illuminated)

A3S

A3K
(Short-body Types)

A3S

A3K
(Short-body Types)
A3P
 
A3P
 
Mounting hole shape (mm) 16.2 × 16.2
Square		 16.2 × 22.4
Rectangle		 23.5 × 22.5
Square		 23.5 × 30.5
Rectangle

  • Small  For Commercial Devices

  • For Industrial Equipment and Facilities  Large

Select the best configuration for your applications from a wide variety of external sizes and specifications.

Structures

Pushbutton Switches generally consist of an operating part, mounting part, switch unit and case part.

2
Mounting Part
This is the part that secures the switch to the panel.
3
Switch Unit
This part opens and closes the electrical circuit.

1
Operating Part
The operating part relays the external operating force to the switch unit.
5
Light Source
This is the light source for illumination.
4
Case Part
The case protects the internal mechanisms of the switch.

1. Operating Part

The operating part relays the external operating force or movement to the switch unit.
The surface of the operating part on Illuminated Switches is illuminated from the light source.
There are two different types of Pushbutton Switches: Momentary Operation (self-resetting) Switches that are ON only while they are being pressed, and Alternate Operation (self-holding) Switches that stay ON when pressed and released and only turn OFF when they are pressed again.

2. Mounting Part

Round Pushbuttons use a mounting nut to secure them into place, while Rectangular Pushbuttons can be snapped into a panel by simply pushing it into the appropriate mounting hole.

3. Switch Unit

The external force or movement received by the operating part is relayed to the pushbutton inside the switch, and it moves the moving armature to open or close the contacts.

4. Case Part

The case protects the internal switch mechanisms.
Wiring is soldered to the terminals protruding from the bottom of the case.
On some switches, the switch unit can be separated from the case to improve wiring efficiency.

Applications Examples

Operation Input, Setting Condition Input, and Operation Status Confirmation for Production Lines

  • Mounted on control panels for large-scale assembly or processing lines and plants

Operation Input for Industrial Equipment

  • Mounted on control panels for machine tools or semi-conductor manufacturing equipment

Plant Control Panels
Machine Tools
Semiconductor Manufacturing Equipment