Product Category

Switches

Push Buttons / Indicator Lamps

Square / Rectangular-body Type

A3P

M2P

A3S

Lighted Pushbutton Switch (Square)

A3S

Pushbutton Switch Series with Square 40-mm Body

Line Up
Specification

Model Number Structure

Model Number Legend

The model numbers used to order sets are illustrated below. One set comprises the Operation Unit, Lamp, and Socket Unit. For more information, refer to Ordering Information. Some forms may not be available for order depending on the combination of functions and specifications described below. Contact your OMRON sales representative for more detailed information. 

 image

Ordering Information

Ordering as a Set

The model numbers used to order sets of Units are given in the following tables. One set comprises the Operation Unit, Lamp, and Socket Unit. Not all combinations are possible. Ask your OMRON representative for details. 

Standard Loads

image

Single screen

Contact type

Standard load (250 VAC, 2 A; 125 VDC 0.4 A)

Operation Unit color symbol

Operation

Momentary operation
 (Self-resetting)

Alternate operation
 (Self-holding)

Output

Lighting

SPDT

LED

5 VDC

A3SJ-90A1-05E[]

A3SJ-90B1-05E[]

Enter the desired color symbol
 for the Pushbutton in [].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

12 VDC

A3SJ-90A1-12E[]

A3SJ-90B1-12E[]

24 VDC

A3SJ-90A1-24E[]

A3SJ-90B1-24E[]

DPDT

LED

5 VDC

A3SJ-90C1-05E[]

A3SJ-90D1-05E[]

12 VDC

A3SJ-90C1-12E[]

A3SJ-90D1-12E[]

24 VDC

A3SJ-90C1-24E[]

A3SJ-90D1-24E[]

Vertical 2-split screen

Contact type

Standard load (250 VAC, 2 A; 125 VDC 0.4 A)

Operation Unit color symbol

Operation

Momentary operation
 (Self-resetting)

Alternate operation
 (Self-holding)

Output

Lighting

SPDT

LED

24 VDC

A3SJ-90A3-24E[][]

A3SJ-90B3-24E[][]

Enter the desired color symbol for
 the Pushbutton in [][].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

DPDT

LED

24 VDC

A3SJ-90C3-24E[][]

A3SJ-90D3-24E[][]

Microloads

Single screen

Contact type

Microload
 (125 VAC, 0.1 A; 30 VDC 0.1 A)

Operation Unit color symbol

Operation

Momentary operation
 (Self-resetting)

Output

Lighting

SPDT

LED

12 VDC

A3SJ-90E1-12E[]

Enter the desired color symbol for the
 Pushbutton in [].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

24 VDC

A3SJ-90E1-24E[]

DPDT

LED

5 VDC

A3SJ-90G1-05E[]

12 VDC

A3SJ-90G1-12E[]

24 VDC

A3SJ-90G1-24E[]

Vertical 2-split screen

Contact type

Microload
 (125 VAC, 0.1 A; 30 VDC 0.1 A)

Operation Unit color symbol

Operation

Momentary operation
 (Self-resetting)

Output

Lighting

SPDT

LED

24 VDC

A3SJ-90E3-24E[][]

Enter the desired color symbol for the
 Pushbutton in [][].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

DPDT

LED

24 VDC

A3SJ-90G3-24E[][]

Standard Loads

image

Single screen

Contact type

Standard load (250 VAC, 2 A; 125 VDC 0.4 A)

Operation Unit
 color symbol

Operation

Momentary operation
 (Self-resetting)

Alternate operation
 (Self-holding)

Output

Lighting

SPDT

LED

5 VDC

A3SA-90A1-05E[]

A3SA-90B1-05E[]

Enter the desired color symbol
 for the Pushbutton in [].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

12 VDC

A3SA-90A1-12E[]

A3SA-90B1-12E[]

24 VDC

A3SA-90A1-24E[]

A3SA-90B1-24E[]

DPDT

LED

5 VDC

A3SA-90C1-05E[]

A3SA-90D1-05E[]

12 VDC

A3SA-90C1-12E[]

A3SA-90D1-12E[]

24 VDC

A3SA-90C1-24E[]

A3SA-90D1-24E[]

Microloads

Single screen

Contact type

Microload
 (125 VAC, 0.1 A; 30 VDC 0.1 A)

Operation Unit color symbol

Operation

Momentary operation
 (Self-resetting)

Output

Lighting

SPDT

LED

5 VDC

A3SA-90E1-05E[]

Enter the desired color symbol for the
 Pushbutton in [].
 R (Red)
 Y (Yellow)
 G (Green)
 W (White)

12 VDC

A3SA-90E1-12E[]

24 VDC

A3SA-90E1-24E[]

DPDT

LED

5 VDC

A3SA-90G1-05E[]

12 VDC

A3SA-90G1-12E[]

24 VDC

A3SA-90G1-24E[]

Ordering Individually

Operation Units, Lamps, and Socket Units can be ordered separately. Combinations that are not available as sets can be created using individual Units. Also, store the parts as spares for maintenance and repairs. 

Operation Unit

LED-lighted Models (LED is not built in.)

Appearance

Rectangular Models (2 LEDs)

image


 (transparent legend plate
 built in)

Square Models (1 LED)

image


 (transparent legend plate
 built in)

Screen pattern

Display color

Single screen

image

White

A3SJ-5801

A3SA-5801

Red

A3SJ-5802

A3SA-5802

Green

A3SJ-5803

A3SA-5803

Yellow

A3SJ-5805

A3SA-5805

2-split
 screen
 *

Standard
 split
 screen

image

White/red

A3SJ-5901

---

White/green

A3SJ-5902

White/yellow

A3SJ-5904

Red/green

A3SJ-5905

Red/yellow

A3SJ-5907

Green/yellow

A3SJ-5909

Reverse
 split
 screen

Red/white

A3SJ-5911

---

Green/white

A3SJ-5912

Green/red

A3SJ-5915

Yellow/red

A3SJ-5917

Yellow/green

A3SJ-5919

One-color
 2-split
 screen

White/white

A3SJ-5921

---

Red/red

A3SJ-5922

Green/green

A3SJ-5923

Yellow/yellow

A3SJ-5925

Note: The color cap is transparent when the display color is white.         
 * Two-split screen configurations are given with the OMRON surface of the case downward. 

Lamp

LED Lamp

Operating voltage

5 VDC

12 VDC

24 VDC

Color

Model (DC only)

Model (DC only)

Model (DC only)

Red

SLL-05ER

SLL-12ER

SLL-24ER

Yellow

SLL-05EY

SLL-12EY

SLL-24EY

Green

SLL-05EG

SLL-12EG

SLL-24EG

White

SLL-05EW

SLL-12EW

SLL-24EW

Note: The A3SJ (M2SJ) requires two LEDs for each Switch. The A3SA (M2SA) requires one LED. 

Switch (LED models)

Appearance

Rectangular
 models

image

Square
 models

image

Selection precautions

Contact type

Number of
 outputs

Operation

Standard
 load

Silver
 contacts

1

Momentary operation

A3SJ-8010

A3SA-7010

Use the Socket Unit in combination
 with the same shape Operation Unit
 (rectangular or square).
 Example:
 For the A3SJ-5801 Rectangular
 Operation Unit, select the
 A3SJ-8[][]0 Socket Unit.
 
 Momentary operation is self-resetting,
 and alternate operation is self-holding
 (i.e., push-on, push-off).

Alternate operation

A3SJ-8020

A3SA-7020

2

Momentary operation

A3SJ-8030

A3SA-7030

Alternate operation

A3SJ-8040

A3SA-7040

Microload

Gold
 alloy
 contacts

1

Momentary operation

A3SJ-8050

A3SA-7050

Alternate operation

A3SJ-8060

A3SA-7060

2

Momentary operation

A3SJ-8070

A3SA-7070

Alternate operation

A3SJ-8080

A3SA-7080

Accessories, Replacements, and Tools

Accessories for Rectangular Models

Name

Appearance

Classification

Model

Application precautions

Barrier

image

Short edge Barriers (1 pair)

A3SA-4001

The purpose of a Barrier is to prevent malfunctioning
 and to improve design image of the mounting panel.
 There is one intermediate Barrier and one pair of edge
 Barriers (2 Barriers).
 Mount Short Barriers horizontally.
 Mount Long Barriers vertically.

Short intermediate Barriers

A3SA-4002

Long edge Barriers (1 pair)

A3SJ-4003

Long intermediate Barriers

A3SJ-4004

Switch Guard

image

-

A3SJ-5050

Cannot be used with Barrier or Seal Cover.

Seal Cover

image

-

A3SJ-5060

Cannot be used with Barrier or Switch Guard.
 Cap material: Vinyl chloride

Long
 Mounting Plate

image

1 pair

A3SJ-3002

Use when vertically mounting individual (with Barrier) or
 multiple Switches (in standard mounting style and with
 Barrier). A Short Mounting Plate is attached to the
 Switch; replace it with the long one.

Name

Appearance

Classification

Model

Application precautions

Socket

image

Wire-wrap terminals

A3SJ-4104

Sockets cannot be used for multiple
 mounting.

PCB terminals

A3SJ-4105

Solder terminals

A3SJ-4106

Dispersion
 plate

image

Milk-white

Single
 screen

A3SJ-5107

-

Color cap

image

Transparent

Single
 screen

A3SJ-5600

• Contact your OMRON representative for
 color changes or inscribing.
 • If LEDs are to be used, use a color cap
 that matches the LED color.

White

A3SJ-5601

Red

A3SJ-5602

Green

A3SJ-5603

Yellow

A3SJ-5605

image

Transparent

2-split
 screen

A3SJ-5630

Green

A3SJ-5633

Yellow

A3SJ-5635

Legend
 plate

image

Transparent

A3SJ-4204

A transparent legend plate is mounted on
 the Operation Unit.

Milk-white

A3SJ-4203

Accessories for Square Models

Name

Appearance

Classification

Model

Application precautions

Barrier

image

Short Edge Barriers (1 pair)

A3SA-4001

The purpose of the Barrier is to prevent malfunctioning
 and to improve design image of the mounting panel.

Short Intermediate Barrier

A3SA-4002

Switch Guard

image

-

A3SA-5050

Cannot be used with Barrier or Seal Cover.

Seal Cover

image

-

A3SA-5060

Cannot be used with Barrier or Switch Guard.
 Cap material: Vinyl chloride

Replacements for Rectangular Models

Replacements for Square Models

Name

Appearance

Classification

Model

Application precautions

Socket

image

Wire-wrap terminals

A3SA-4101

Sockets cannot be used for multiple
 mounting.

PCB terminals

A3SA-4102

Solder terminals

A3SA-4103

Dispersion
 plate

image

Milk-white

A3SA-5107

-

Color cap

image

Transparent

A3SA-5600

• Contact your OMRON representative for
 color changes or inscribing.
 • If LED colors are to be used, use a color
 cap that matches the LED color.

White

A3SA-5601

Red

A3SA-5602

Green

A3SA-5603

Blue

A3SA-5604

Yellow

A3SA-5605

Legend
 plate

image

Transparent

A3SA-4204

A transparent color cap is mounted to a
 standard Display.

Milk-white

A3SA-4203

Tools

Name

Appearance

Classification

Model

Application precautions

Extractor

image

-

A3PJ-5080

Convenient for extracting the Operation Unit.