Refer to Safety Precautions for All Pushbutton Switches and
Safety Precautions on page 8.
A
3
A
List of Models
●Non-lighted
Push-button Switches
Appearance
Model
●Lighted
Push-button Switches
Illumination
Appearance
Model
Square
A3AA-9@
@1-00@
LED
surface
illumination
Square
A3AA-9@
@1-00E@
Round
A3AT-9@
@1-00@
Round
A3AT-9@
@1-00E@
Model Number Structure
■Model
Number Legend (Ordering as a Set)......
(1)
(2)
(3)
The model numbers used to order sets of Units are illustrated below.
One set comprises the Pushbutton (LED lamp built-in) and Switch.
For information on combinations, refer to Ordering Information.
(4)
(5)
A 3 A
A
- 9
0 K
1 -
00E R
(1) Shape of Pushbutton
Symbol
A
T
Shape
Square
Round
(5) Color
1. Pushbutton
(Non-lighted Models)
Symbol
L
R
Color
Light gray
Red*
Yellow*
Green*
Blue
Black
Dark gray
Gray
(2) Terminal
Symbol
0
1
Type
Solder
PCB
Y
G
A
B
D
H
Contact type
SPDT
(3) Switch Specifications
Symbol
A
B
K
L
Operation
Momentary
Alternate
Momentary
Alternate
SPST-NO
(
3 A at 125 VAC,
2 A at 30 VDC
6 A at 125 VAC,
2 A at 250 VAC,
4 A at 30 VDC
)
(4) Illumination
Symbol
00
00E
Operation
Non-lighted
Surface illumination
2. LED (Surface
Illumination Models)
Symbol
R
Y
G
*
Color
Red
Yellow
Green
(
)
Common to both lighted and
non-lighted models.
■Specifications:
Refer to page 3.
■Accessories:
Refer to page 2.
■Dimensions:
Refer to page 5.
1
A3A
List of Models
SPST-NO
Appearance
Square/A3AA
Momentary
LED surface illumination
Solder
Non-lighted
Alternate
LED surface illumination
Non-lighted
Momentary
LED surface illumination
PCB
Non-lighted
Alternate
LED surface illumination
Terminal
Operation
Illumination
Non-lighted
Model
Lighted Pushbutton Switch
Color symbol for
pushbutton
Minimum
packing unit
A3AA-90K1-00@
A3AA-90K1-00E@
A3AA-90L1-00@
A3AA-90L1-00E@
A3AA-91K1-00@
A3AA-91K1-00E@
A3AA-91L1-00@
A3AA-91L1-00E@
A3AT-90K1-00@
A3AT-90K1-00E@
A3AT-90L1-00@
A3AT-90L1-00E@
A3AT-91K1-00@
A3AT-91K1-00E@
A3AT-91L1-00@
A3AT-91L1-00E@
(Non-lighted)
R (red)
Y (yellow)
G (green)
L (light gray)
A (blue)
B (black)
D (dark gray)
H (gray)
(Surface illumination)
R (red)
Y (yellow)
G (green)
A
3
A
Round/A3AT
Momentary
Solder
100
Non-lighted
LED surface illumination
Non-lighted
Alternate
LED surface illumination
Non-lighted
Momentary
LED surface illumination
PCB
Non-lighted
Alternate
LED surface illumination
Note: The above models each have a SPST-NO contact that can switch 6 A at 125 VAC, 2 A at 250 VAC, and 4 A at 30 VDC. When ordering any of the above models,
replace
@
of the model number with a code to indicate the pushbutton color of the model (i.e., replace
@
with R, Y, G, L, A, B, D, H, and L). The pushbutton of
an A3A does not illuminate if the color of the pushbutton is dark gray, gray, light gray, blue, or black.
SPDT
Appearance
Square/A3AA
Momentary
LED surface illumination
Solder
Non-lighted
Alternate
LED surface illumination
Non-lighted
Momentary
LED surface illumination
PCB
Non-lighted
Alternate
LED surface illumination
Round/A3AT
Momentary
LED surface illumination
Solder
Non-lighted
Alternate
LED surface illumination
Non-lighted
Momentary
LED surface illumination
PCB
Non-lighted
Alternate
LED surface illumination
A3AT-91B1-00E@
A3AT-91B1-00@
A3AT-91A1-00E@
A3AT-90B1-00E@
A3AT-91A1-00@
A3AT-90B1-00@
A3AT-90A1-00E@
Non-lighted
A3AA-91B1-00E@
A3AT-90A1-00@
A3AA-91B1-00@
A3AA-91A1-00E@
A3AA-90B1-00E@
A3AA-91A1-00@
(Non-lighted)
R (red)
Y (yellow)
G (green)
L (light gray)
A (blue)
B (black)
D (dark gray)
H (gray)
(Surface illumination)
R (red)
Y (yellow)
G (green)
A3AA-90B1-00@
A3AA-90A1-00E@
Terminal
Operation
Illumination
Non-lighted
Model
A3AA-90A1-00@
Color symbol for
pushbutton
Minimum
packing unit
100
■Accessories
Flange
(Select according to panel color.)
Name
Square
@12.7
Flange alone
Round
φ12.7
Flange
Square
@12.7
Round
φ12.7
Leaf spring
Black
Flange and leaf
spring
(one each)
Light gray
Black
Light gray
Black
Light gray
A3A-251
A3A-252
A3A-200
A3A-211
A3A-212
A3A-221
A3A-222
100
Shape
Classification
Black
Light gray
Model
A3A-241
A3A-242
Minimum
packing unit
Note: An A3A with solder terminals is provided with a round or square black flange and leaf spring. A round black flange is provided with each A3A having solder
terminals and a round pushbutton. A square black flange is provided with each A3A having solder terminals and a square pushbutton.
2
A3A
Specifications
■Approved
Standards
• SPST-NO
UL
CSA
6 A at 125 VAC
2 A at 250 VAC
4 A at 30 VDC
• SPDT
3 A at 125 VAC
2 A at 30 VDC
Lighted Pushbutton Switch
■Characteristics
Operating
frequency
Mechanical
Electrical
Momentary action: 120 operations/minute max.
Alternate action: 60 operations/minute max. *1
20 operations/minute max.
100 MΩ min. (at 500 VDC)
100 mΩ max. (initial value)
600 VAC, 50/60 Hz for 1 min
Insulation resistance
Contact resistance
Between
terminals of
same polarity
Between
each terminal
and ground
Malfunction
Destruction
Malfunction
Mechanical
Electrical
Weight
Ambient operating
temperature
Ambient operating humidity
25
75
Ambient storage
temperature
Degree of protection
Electric shock protection
class
PTI (proof tracking index)
Pollution degree
*1.
■Ratings
Item
Type
General load
Contact form
SPST-NO
AC resistive load
6 A at 125 VAC
2 A at 250 VAC
DC resistive load
4 A at 30 VDC
Vibration
resistance
Shock
resistance
Dielectric
strength
2,000 VAC, 50/60 Hz for 1 min
Note: Minimum allowable load: 5 VDC 1 mA (Resistive)
The ratings given above are for testing under the following conditions:
(1) Ambient temperature: 20 ±2°C
(2) Ambient humidity: 65 ±5%
(3) Operating frequency: 20 times/minute
10 to 55 Hz, 1.5-mm double amplitude *2
500 m/s
2
150 m/s
2
*2
Momentary action: 1,000,000 operations min.
Alternate action: 50,000 operations min. *1
50,000 operations min.
Approx. 3.2 g
−10°C
to
+55°C
(with no icing)
35% to 85%
−25°C
to
+65°C
(with no icing)
IP00
Class II
175
3 (IEC947-5-1)
A
3
A
LED
Illumination
Item
Forward voltage V
F
Forward current I
F
Standard value (V) *
(I
F
= 10 mA)
Maximum value (V)
Maximum value (mA)
20
60
Surface illumination
Red
2.0
Yellow
2.1
3.0
20
60
3
Green
2.1
Durability
Permissible loss PD Maximum value (mW)
Reverse voltage V
R
Maximum value (V)
Note: The above built-in LEDs do not have a resistor. Connect to each of the
above built-in LEDs a resistor that satisfies the above conditions.
*
Refer to the V
F
– I
F
characteristic graphs on page 8.
■Operating
Characteristics
Operating force
Release force
Total travel
Pretravel
Locktravel alternate *
*
OF max.
RF min.
TT
PT max.
LTA min.
2.45 N
0.15 N
Approx. 2mm
1.5 mm
0.5 mm
*2.
With alternate operation models, one operation cycle consists of set and
reset operations.
Indicates malfunctions of less than 1 ms.
■
Contact Form
Contact name
Double-break
Double-throw
Contact form
SPST-NO
SPDT
NO
Contact type
NO
NC
COM
NO
Alternate operation models only.
3
A3A
Nomenclature
■Model
Structure
<Pushbutton>
1.
Shape
Square
(A3AA)
Round
(A3AT)
Lighted Pushbutton Switch
4.Color cap
Diffusion
sheet
(milky white)
5. Color
• Non-lighted Model
A
3
A
Red , yellow , light gray ,
gray , dark gray ,
Flange
green ,
blue
,
black
•
Surface
Illumination Model
Red , yellow , green
<Switch>
3.
Ratings
Standard
load
6 A
at
125 VAC
2 A
at
250 VAC
4 A
at 30
VDC
*
Minimum
applicable
load:
1 mA
at
5 VDC (resistive load)
Leaf
spring
2. Terminals
•
Solder
terminal
• PCB terminal
Note 1. The above is for the A3AA.
2. An A3A with solder terminals is provided with a black flange and leaf spring, however an A3A with PCB terminals is not provided with them. If a black flange
and leaf spring are required for an A3A with PCB terminals, order them from your OMRON representative. (Refer to page 2.)
4
A3A
Dimensions
Non-lighted Model
Square Pushbutton
Square push-button
Lighted Pushbutton Switch
(Unit: mm)
SPST-NO
SPDT
@8.9
1.7
1.7
1
1
12.5
18
3.5
12.5
18
3.5
Round Pushbutton
Round push-button
15.2
Three, t0.4
terminals
Two, t0.4
terminals
8.9 dia.
12.7
A
3
A
Surface Illumination Model
Square Pushbutton
Square push-button
SPST-NO
SPDT
@8.9
1.7
1.7
1
1
12.5
3.5
18
12.5
3.5
Round Pushbutton
Round push-button
15.2
18
Three, t0.4 terminals
Two, t0.4 terminals
12.7
8.9 dia.
Two, t0.3 LED terminals
Two, t0.3 LED terminals
Note: All units are in millimeters unless otherwise indicated.
The illustrations below show switches with solder terminals, without a flange or leaf spring.
Unless specified, there is a tolerance of ±0.4mm for dimensions.
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Microcontroller MCU
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