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A3S

Lighted Pushbutton Switch (Square)

A3S

Pushbutton Switch Series with Square 40-mm Body

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.

A3S Lineup 2

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

A3S Lineup 5

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)
A (Blue)
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)
A (Blue)
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 5 VDC A3SJ-90E1-05E[] Enter the desired color symbol for the
Pushbutton in [].
R (Red)
Y (Yellow)
G (Green)
A (Blue)
W (White)
12 VDC A3SJ-90E1-12E[]
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)
A (Blue)
DPDT LED 24 VDC A3SJ-90G3-24E[][]

Standard Loads

A3S Lineup 11

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)
A (Blue)
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)
A (Blue)
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)
1126_lu_9_1
(transparent legend plate
built in)
Square Models (1 LED)
1126_lu_9_2
(transparent legend plate
built in)
Screen pattern Display color
Single screen
1126_lu_9_3
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
1126_lu_9_4
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
Yellow/white A3SJ-5914
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
1126_lu_13_1
Square
models
1126_lu_13_2
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
1126_lu_14_1
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
1126_lu_14_2
- A3SJ-5050 Cannot be used with Barrier or Seal Cover.
Seal Cover
1126_lu_14_3
- A3SJ-5060 Cannot be used with Barrier or Switch Guard.
Cap material: Vinyl chloride
Long
Mounting Plate
1126_lu_14_4
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.

Accessories for Square Models

Name Appearance Classification Model Application precautions
Barrier
1126_lu_15_1
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
1126_lu_15_2
- A3SA-5050 Cannot be used with Barrier or Seal Cover.
Seal Cover
1126_lu_15_3
- A3SA-5060 Cannot be used with Barrier or Switch Guard.
Cap material: Vinyl chloride

Replacements for Rectangular Models

Name Appearance Classification Model Application precautions
Socket 1126_lu_16_1 Wire-wrap terminals A3SJ-4104 Sockets cannot be used for multiple
mounting.
PCB terminals A3SJ-4105
Solder terminals A3SJ-4106
Dispersion
plate
1126_lu_16_2 Milk-white Single
screen
A3SJ-5107 -
Color cap 1126_lu_16_3 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
1126_lu_16_4 Transparent 2-split
screen
A3SJ-5630
Green A3SJ-5633
Yellow A3SJ-5635
Legend
plate
1126_lu_16_5 Transparent A3SJ-4204 A transparent legend plate is mounted on
the Operation Unit.
Milk-white A3SJ-4203

Replacements for Square Models

Name Appearance Classification Model Application precautions
Socket 1126_lu_17_1 Wire-wrap terminals A3SA-4101 Sockets cannot be used for multiple
mounting.
PCB terminals A3SA-4102
Solder terminals A3SA-4103
Dispersion
plate
1126_lu_17_2 Milk-white A3SA-5107 -
Color cap 1126_lu_17_3 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
1126_lu_17_4 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
1126_lu_18_1
- A3PJ-5080 Convenient for extracting the Operation Unit.