Lighted Pushbutton Switch
Compact Switch Allows Signal and
Power Switching with the Same Model
Compact, high-capacity push-button switch that
has contacts with a 3-mm gap and is ideal as a
power switch.
Capable of switching within the range of 1 mA,
5 VDC to 6 A, 125 VAC.
Requires only 14.5 mm behind the panel.
Options include the following:
•
Round or square
•
Momentary or alternate
•
Surface illumination or non-lighted
UL and CSA approved.
A3A
RC
Ordering Information
Model Number Legend
(1)
(2)
(3)
(4)
(5)
A 3 A A - 9 0 K 1 - 00E R
(1) Shape
Symbol
A
T
(2) Terminal
Symbol
0
1
(3) Switch
Symbol
A (See note)
B (See note)
K
L
Operation
Momentary
Alternate
Momentary
Alternate
SPST-NO
Contact type
SPDT
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
Type
Solder
PCB
Protection
Square
Round
(5) Color
Pushbutton (Non-lighted Models)
Symbol
L
R
Y
G
A
B
D
H
Color
Light gray
Red (See note)
Yellow (See note)
Green (See note)
Blue
Black
Dark gray
Gray
LED (Surface Illumination Models)
Symbol
R
Y
G
Color
Red
Yellow
Green
Note:
Common to both lighted and non-
lighted models.
210
A3A
List of Models
SPST-NO
Appearance
Square
q
A3AA 9jj1 00j
A3AA-9jj1-00j
A3AA-9jj1-00Ej
Terminal
Solder
Action
Momentary
Alternate
PCB
Momentary
Alternate
Round
A3AT 9jj1 00j
A3AT-9jj1-00j
A3AT-9jj1-00Ej
Solder
Momentary
Alternate
PCB
Momentary
Alternate
Note:
Illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Model
A3AA-90K1-00j
A3AA-90K1-00Ej
A3AA-90L1-00j
A3AA-90L1-00Ej
A3AA-91K1-00j
A3AA-91K1-00Ej
A3AA-91L1-00j
A3AA-91L1-00Ej
A3AT-90K1-00j
A3AT-90K1-00Ej
A3AT-90L1-00j
A3AT-90L1-00Ej
A3AT-91K1-00j
A3AT-91K1-00Ej
A3AT-91L1-00j
A3AT-91L1-00Ej
R: red
Y: yellow
G: green
Color
(Non-lighted)
(
g
)
A3A
L: light gray (see note)
A: blue (see note)
B: black (see note)
D: dark gray (see note)
H: gray (see note)
(Lighted)
R: red
Y: yellow
G:
G green
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
j
of the model number with a code to indicate the pushbutton color of the model (i.e., replace
j
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-9jj1-00j
A3AA 9jj1 00Ej
A3AA-9jj1-00Ej
Terminal
Solder
Action
Momentary
y
Alternate
PCB
Momentary
y
Alternate
Round
A3AT 9jj1 00j
A3AT-9jj1-00j
A3AT-9jj1-00Ej
Solder
Momentary
y
Alternate
PCB
Momentary
y
Alternate
Illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Non-lighted
Surface illumination
Note:
Model
A3AA-90A1-00j
A3AA-90A1-00Ej
A3AA-90B1-00j
A3AA-90B1-00Ej
A3AA-91A1-00j
A3AA-91A1-00Ej
A3AA-91B1-00j
A3AA-91B1-00Ej
A3AT-90A1-00j
A3AT-90A1-00Ej
A3AT-90B1-00j
A3AT-90B1-00Ej
A3AT-91A1-00j
A3AT-91A1-00Ej
A3AT-91B1-00j
A3AT-91B1-00Ej
R: red
Y: yellow
G: green
L: light gray (see note)
A: blue (see note)
B: black (see note)
D: dark gray (see note)
H: gray (see note)
(Lighted)
R: red
Y: yellow
G: green
Color
The above models each have a SPDT contact that can switch 3 A at 125 VAC and 2 A at 30 VDC. When ordering any of the above
models, replace
j
of the model number with a code to indicate the pushbutton color of the model (i.e., replace
j
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.
211
A3A
Accessories (Order Separately)
Flange
Select according to panel color.
Name
Flange
Shape
Square, 12.7 x 12.7
Flange alone
Classification
Black
Light gray
Round, 12.7 dia.
Black
Light gray
Leaf spring
A3A-241
A3A-242
A3A-251
A3A-252
A3A-200
Model
A3A
Square, 12.7 x 12.7
Flange and leaf spring
(one each)
Black
Light gray
A3A-211
A3A-212
A3A-221
A3A-222
Round, 12.7 dia.
Black
Light gray
Note:
An A3A with solder terminals is provided with a round or square black flange and leaf spring for the switching mechanism of the A3A. 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.
Specifications
Contact Ratings
Type
High capacity
Note:
Contact form
SPST-NO
6 A at 125 VAC
2 A at 250 VAC
Resistive load
4 A at 30 VDC
1. Minimum allowable load: 5 VDC 1 mA (Resistive)
2. 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
LED Ratings
Item
Red
Forward voltage V
F
Forward current I
F
Permissible loss PD
Reverse voltage V
R
Note:
Standard value
Maximum value
Standard value
Maximum value
Absolute max. value
Absolute max. value
2.0 V
3V
10 mA
20 mA
60 mW
3V
25 mA
75 mW
25 mA
75 mW
2.1 V
Surface illumination
Yellow
2.1 V
Green
1. 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 condi-
tions.
2. Refer to the V
F
– I
F
characteristic graphs on page 219.
212
A3A
Characteristics
Operating frequency
Mechanical:
Momentary action:
Alternate action:
120 operations/minute max.
60 operations/minute max. (See note 1.)
A3A
Electrical: 20 operations/minute max.
Insulation resistance
Contact resistance
Dielectric strength
100 MΩ min. (at 500 VDC)
100 mΩ max. (initial value)
600 VAC, 50/60 Hz for 1 min between terminals of same polarity
2,000 VAC, 50/60 Hz for 1 min between each terminal and ground
600 VAC, 50/60 Hz for 1 min between LED terminals (See note 2.)
Malfunction: 10 to 55 Hz, 1.5-mm double amplitude (See note 3.)
Destruction: 500 m/s
2
Malfunction: 150 m/s
2
(See note 3.)
Mechanical:
Momentary action:
Alternate action:
Approx. 3.2 g
Operating: –10°C to 55°C (with no icing)
Storage:
–25°C to 65°C
Operating: 35% to 85%
IP00
Class II
175
3 (IEC947-5-1)
1,000,000 operations min.
50,000 operations min. (See note 1.)
Vibration resistance
Shock resistance
Life expectancy
Electrical: 50,000 operations min.
Weight
Ambient temperature
Ambient humidity
Degree of protection
Electric shock protection class
PTI (proof tracking index)
Pollution degree
Note:
1. With alternate-action models, a setting and resetting is regarded as one operation.
2. The figure for the dielectric strength between LED terminals in the above table is for when the LED is not installed in the Switch.
3. The figures for malfunctions in the above table are for malfunctions of at least 1 ms.
Approved Standards
UL (File No. E41515)/CSA (File No. LR45258)
SPST-NO: 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
Operating Characteristics
OF max.
RF min.
TT
PT max.
2.45 N
0.15 N
Approx. 2 mm
1.5 mm
LTA min. (See note.)
0.5 mm
Note:
The above lock stroke figure applies to A3A alternate
operation models only.
213
A3A
A3A
Nomenclature
Pushbutton
Square (A3AA)
Round (A3AT)
Color cap
Diffusion sheet (milky white)
Color
Non-lighted Model
Red, yellow, light gray, gray, dark gray, green blue,
black
Flange
Surface Illumination Model
Red, yellow, green
Switch
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)
Terminals
Solder terminal
PCB terminal
Leaf spring
Contact Form
Contact Type
Contact form
SPST-NO
NO
NO
NC
COM
NO
Contact type
SPDT
Note:
1. The above is for the A3AA.
2. An A3A with solder terminals is provided with a black flange and leaf spring for the switching mechanism, 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.
214
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