Omron A3AA-90K1-00 User manual

210
Lighted Pushbutton Switch A3A
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. RC
Ordering Information
Model Number Legend
A 3 A A - 9 0 K 1 - 00E R
(1) (2) (3) (4)
(1) Shape
Symbol Protection
A Square
T Round
(5)
(3) Switch
Symbol Operation Contact type
A (See note) Momentary SPDT
B (See note) Alternate
K Momentary SPST-NO
L Alternate
(2) Terminal
Symbol
(4) Illumination
Symbol Operation
00 Non-lighted
00E Surface illumination
Type
0 Solder
1 PCB
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
(5) Color
Pushbutton (Non-lighted Models)
Symbol Color
L Light gray
R Red (See note)
Y Yellow (See note)
G Green (See note)
A Blue
B Black
D Dark gray
H Gray
LED (Surface Illumination Models)
Symbol Color
R Red
Y Yellow
G Green
Note: Common to both lighted and non-
lighted models.
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List of Models
SPST-NO
Appearance Terminal Action Illumination Model Color
Square Solder Momentary Non-lighted A3AA-90K1-00j(Non-lighted)
q
A3AA-9jj1-00jSurface illumination A3AA-90K1-00Ej
(g)
R: red
A3AA 9jj100j
A3AA-9jj1-00EjAlternate Non-lighted A3AA-90L1-00j
R:
red
Y: yellow
Surface illumination A3AA-90L1-00Ej
Y:
yellow
G:
g
reen
PCB Momentary Non-lighted A3AA-91K1-00j
G:
green
L: li
g
ht
g
ra
y
(
see note
)
Surface illumination A3AA-91K1-00Ej
L:
light
gray
(see
note)
A: blue
(
see note
)
Alternate Non-lighted A3AA-91L1-00j
A:
blue
(see
note)
B: black (see note)
Surface illumination A3AA-91L1-00Ej
B:
black
(see
note)
D: dark gray (see note)
Round Solder Momentary Non-lighted A3AT-90K1-00j
D
:
d
ar
k
gray
(
see no
t
e
)
H: gray (see note)
A3AT-9jj1-00jSurface illumination A3AT-90K1-00Ej
H
: gray
(
see no
t
e
)
(Lighted)
A3AT 9jj100j
A3AT-9jj1-00EjAlternate Non-lighted A3AT-90L1-00j(Lighted)
R: red
Surface illumination A3AT-90L1-00EjR: red
Y: yellow
PCB Momentary Non-lighted A3AT-91K1-00jY: yellow
G
Surface illumination A3AT-91K1-00EjG: green
Alternate Non-lighted A3AT-91L1-00j
Surface illumination A3AT-91L1-00Ej
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 jof the model number with a code to indicate the pushbutton color of the model (i.e., replace jwith
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 Terminal Action Illumination Model Color
Square Solder Momentary Non-lighted A3AA-90A1-00jR: red
Square
A3AA-9jj1-00j
A3AA 9jj1 00Ej
y
Surface illumination A3AA-90A1-00EjY: yellow
A3AA-9jj1-00EjAlternate Non-lighted A3AA-90B1-00j
Y:
yellow
G: green
Surface illumination A3AA-90B1-00Ej
G:
green
L: li
g
ht
g
ra
y
(
see note
)
PCB Momentary Non-lighted A3AA-91A1-00j
L:
light
gray
(see
note)
A: blue
(
see note
)
y
Surface illumination A3AA-91A1-00Ej
A:
blue
(see
note)
B: black
(
see note
)
Alternate Non-lighted A3AA-91B1-00j
B:
black
(see
note)
D: dark gray (see note)
Surface illumination A3AA-91B1-00Ej
D:
dark
gray
(see
note)
H: gray (see note)
Round
A3AT 9jj100j
Solder Momentary Non-lighted A3AT-90A1-00j
H
: gray
(
see no
t
e
)
(Lighted)
A3AT-9jj1-00j
A3AT-9jj1-00Ej
y
Surface illumination A3AT-90A1-00Ej
(Li
g
ht
e
d)
R: red
A3AT
-
9jj1
-
00Ej
Alternate Non-lighted A3AT-90B1-00jR: red
Y: yellow
Surface illumination A3AT-90B1-00EjY: yellow
G: green
PCB Momentary Non-lighted A3AT-91A1-00jG: green
y
Surface illumination A3AT-91A1-00Ej
Alternate Non-lighted A3AT-91B1-00j
Surface illumination A3AT-91B1-00Ej
Note: 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 jof the model number with a code to indicate the pushbutton color of the model (i.e., replace jwith 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.
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Accessories (Order Separately)
Flange
Select according to panel color.
Name Shape Classification Model
Flange Square, 12.7 x 12.7 Flange alone Black A3A-241
Light gray A3A-242
Round, 12.7 dia. Black A3A-251
Light gray A3A-252
Leaf spring A3A-200
Square, 12.7 x 12.7 Flange and leaf spring
(
one each
)
Black A3A-211
(one
each)
Light gray A3A-212
Round, 12.7 dia. Black A3A-221
Light gray A3A-222
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 Contact form Resistive load
High capacity SPST-NO 6 A at 125 VAC
2 A at 250 VAC 4 A at 30 VDC
Note: 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 Surface illumination
Red Yellow Green
Forward voltage VFStandard value 2.0 V 2.1 V 2.1 V
Maximum value 3 V
Forward current IFStandard value 10 mA
Maximum value 20 mA 25 mA 25 mA
Permissible loss PD Absolute max. value 60 mW 75 mW 75 mW
Reverse voltage VRAbsolute max. value 3 V
Note: 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 VF– IFcharacteristic graphs on page 219.
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Characteristics
Operating frequency Mechanical:
Momentary action: 120 operations/minute max.
Alternate action: 60 operations/minute max. (See note 1.)
Electrical: 20 operations/minute max.
Insulation resistance 100 MΩmin. (at 500 VDC)
Contact resistance 100 mΩmax. (initial value)
Dielectric strength 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.)
Vibration resistance Malfunction: 10 to 55 Hz, 1.5-mm double amplitude (See note 3.)
Shock resistance Destruction: 500 m/s2
Malfunction: 150 m/s2(See note 3.)
Life expectancy Mechanical:
Momentary action: 1,000,000 operations min.
Alternate action: 50,000 operations min. (See note 1.)
Electrical: 50,000 operations min.
Weight Approx. 3.2 g
Ambient temperature Operating: –10°C to 55°C (with no icing)
Storage: –25°C to 65°C
Ambient humidity Operating: 35% to 85%
Degree of protection IP00
Electric shock protection class Class II
PTI (proof tracking index) 175
Pollution degree 3 (IEC947-5-1)
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. 2.45 N
RF min. 0.15 N
TT Approx. 2 mm
PT max. 1.5 mm
LTA min. (See note.) 0.5 mm
Note: The above lock stroke figure applies to A3A alternate
operation models only.
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Nomenclature
Pushbutton
Square (A3AA) Round (A3AT) Color cap
Color
Non-lighted Model
Red, yellow, light gray, gray, dark gray, green blue,
black
Surface Illumination Model
Red, yellow, green
Flange
Leaf spring
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
Diffusion sheet (milky white)
Contact Form
Contact Type
Contact form Contact type
SPST-NO NO NO
SPDT NC
NOCOM
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.
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Dimensions
Note: 1. All units are in millimeters unless otherwise indicated.
2. The illustrations below show switches with solder terminals, without a flange or leaf spring.
Non-lighted Model
Square Pushbutton
Round Pushbutton
Surface Illumination Model
Square Pushbutton
Round Pushbutton
Square push-button
8.9 ×8.9
Round push-button
8.9 dia.
8.9 ×8.9
Square push-button
Round push-button Two, t0.4 terminals
Surface illumination
Surface illumination
Two, t0.3 LED terminals
8.9 dia.
Two, t0.4
terminals
Three, t0.4
terminals
SPST-NO SPDT
SPST-NO SPDT
Three, t0.4
terminals
Two, t0.3 LED terminals
15.2
15.2
Accessories (Order Separately)
Note: Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
Leaf Spring
A3A-200 Flange (Square)
A3A-24jFlange (Round) A3A-25j
12.7
9.1
t = 0.3
12.7 dia.
9.1 dia.
1.0 1.0
9.112.7
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Panel Cutouts
Square Pushbutton
Round Pushbutton
11.5+0.2
0
11.5+0.2
0
11.5+0.2
0 dia.
14.5 max.
Flange
Panel (See note.)
Leaf spring
Note: 1. Recommended panel
thickness: 1 to 1.6 mm
2. The diagram shows the
lighted SPST-NO model.
Panel Mounting Dimensions
For Side-by-side Mounting
Mounting Square pushbutton Round pushbutton
Horizontal multiple mounting
3.8 min
15.3 min.
11.5+0.2
–0
11.5+0.2
–0 15.3 min.
11.5+0.2
0 dia.
Vertical multiple mounting
11.5+0.2
–0
11.5+0.2
0 dia.
12.7 min.
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Terminals
Solder terminal PCB terminal
SPST-
NO Non-lighted Models
Lighted Models
Terminal Arrangement
(Bottom View)
LED
terminal
Terminal for models
with an illuminating
push-button
0.8 0.8 x 2
10.16
Switch terminal:
t0.4
Switch terminal: t0.4
Lamp terminal: t0.3
Non-lighted Models Lighted Models
Terminal Arrangement
(Bottom View) PCB Dimensions (Bottom View)
LED
terminal
Terminal for models
with an illuminating
push-button
Four,
1 dia.
holes
Holes for models
with illuminating
push-button
10.16
4.48
(0.67)
(1.87)
10.16
Switch terminal: t0.4 Switch terminal: t0.4
Lamp terminal: t0.3
SPDT Non-lighted Models
Lighted Models
Terminal Arrangement
(Bottom View)
LED
terminal
Switch terminal: t0.4
Lamp terminal: t0.3
Switch terminal:
t0.4
1.95
Non-lighted Models Lighted Models
Terminal Arrangement
(Bottom View) PCB Dimensions (Bottom View)
LED
terminal Five, 1-dia.
holes Holes for models
with illuminating
push-button
Switch terminal: t0.4 Switch terminal: t0.4
LED terminal: t0.3
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Installation
Mounting and Replacing the Pushbutton
Mounting Direction for the Pushbutton and Switch
•Insert the catches of the Pushbutton into the grooves of the
Switch and push down on the Pushbutton until it is fixed securely
to the Switch.
•With lighted models, the LED is built into the Switch and cannot
be replaced.
Catches on the Pushbutton
Grooves in the Switch
LED terminals
Removing the Pushbutton (Non-lighted Models Only)
•To remove the Pushbutton, hold both the Pushbutton and the
Switch on the longer sides and pull the Pushbutton away from
the Switch. (If the catches on the Pushbutton are bent outwards,
it may result in malfunction.)
Catch
•When replacing the Pushbutton, if the cap is held on the sides
with catches, internal components (e.g., plate) may come loose.
Be sure to hold the Pushbutton by the sides without catches (i.e.,
the longer sides of the Switch) when removing.
Mounting Switch on a Panel
Mount Leaf Spring
Press the leaf spring into the fitted groove on the upper surface of
the Switch. For an easier fitting, first fit one side of the leaf spring,
then press the other side into the fitting groove.
Leaf spring
Leaf spring
fitting groove
Switch
Note: Be sure to fit the leaf spring exactly into the groove, and do
not allow it to slip out of the groove.
Mount Flange on Panel
Insert the flange from the front surface of the panel.
Panel
Flange
Guide
The flange has two opposing guides to facilitate its insertion into the
panel cutout hole. Be sure the flange does not remain tilted with re-
spect to the panel surface after being installed.
Cross Section
Flange
Panel (t = 1 to 1.6 mm)
Note: The mounting direction of the flange determines the
orientation of the Switch.
Fit Flange with Switch
While holding the flange, insert the opposing supports into the gaps
between the leaf spring and Switch on the longer sides of the hous-
ing, and fit the rectangular hole of the flange with the projections of
the switch housing.
Support
Panel
Projection
Note: Completely remove any burrs on the panel cutout surface;
otherwise, the flange and Switch will not attach solidly.
Removing Switch
Insert a small flat-bladed screwdriver or tweezers into the flange
support exposed on the rear of the panel. Pry up on each side to pull
out the Switch.
Panel Flat-bladed screwdriver
or tweezers
Note: Do not pry up the flange support more than necessary or
the switch holding portions may be damaged.
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Precautions
Operation
When operating an A3A, make sure that the A3A has a pushbutton.
Do not operate the A3A with a screwdriver or tweezers without
mounting a pushbutton to the A3A, otherwise the A3A may malfunc-
tion.
Mounting
When opening a hole on a panel to mount an A3A to the panel, make
sure that the hole has no burr.
When mounting a flange to the switching mechanism of an A3A,
make sure that the flange and the casing of the switching mecha-
nism are engaged securely.
Wiring
When soldering the terminals of an A3A, refer to the following.
1. For manual soldering: Use a soldering iron with the terminals
at a temperature of 350°C maximum within three seconds.
2. Do not impose any external force on the terminals for one
minute after the terminals are soldered.
Do not pull the terminals of any A3A with a force exceeding 5.34 N,
otherwise the joint part of the A3A may be damaged.
When soldering the terminals of an A3A, apply non-corrosive rosin
flux to the terminals.
After soldering the terminals of an A3A, do not wash the A3A with
any solvent.
When mounting an A3A to a PCB and soldering the terminals of the
A3A to the PCB, make sure that the flux will not rise above the sur-
face of the PCB.
Operating Environment
When using an A3A, make sure that dust, metal powder, or oil will
not penetrate into the interior of the A3A.
LED
The polarity of the LED is indicated on the back of the Switch. Wire
the LED correctly according to the polarity.
An A3A with a built-in LED does not have a limiting resistor. Connect
a limiting resistor.
The resistance can be calculated by using the following expression.
R = (E –VF)/IF(Ω)
E: Applied voltage (V)
VF: LED forward voltage (V)
IF: LED forward current (A)
Note: Make sure that the limiting resistor connected to the built-in
LED of an A3A satisfies the characteristics of the built-in
LED. The mean forward current of the built-in LED must be
8 mA minimum.
Example
Conditions: Red LED with an IFof –10 mA at 24 V and a Ta of 25°C.
From the red LED characteristic below, VFwill be 2 V when IFis
10 mA. Therefore, R = (24 V – 2 V)/0.01 A = 2,200 Ω.
Thus the recommended resistance is 2.2 kΩat 0.5 W (2* x IF2R).
Note: A factor of 2 (marked with an asterisk) is applied because
the permissible wattage of the resistor must be twice as
large as the required wattage.
LED Characteristics (VF– IFCharacteristics)
Ta: Ambient Temperature
Red
Green
Yellow
Ta = 25°C
Forward Current: Ir (mA)
Forward Voltage: Vr (V)
Ta = 25°C
Forward Current: Ir (mA)
Forward Voltage: Vr (V)
Ta = 25°C
Forward Current: Ir (mA)
Forward Voltage: Vr (V)
Pushbutton
When exchanging the Pushbutton (except the ones for the mechan-
ical indicator models) with a new one, pull out the Pushbutton from
the Switch, holding the Pushbutton in the longitudinal direction.
Do not remove the Pushbutton of the mechanical indicator model.
Engraving of Pushbutton
Depth of engraving:
0.3 mm max. for illuminating pushbutton
Since the Pushbutton is made of polycarbonate, use an alcohol-
based solvent when cleaning the Unit.
Pressing of Pushbutton
Apply firm pressure to the Pushbutton when operating it. In doing
so, however, do not apply a pressure greater than 11.8 N.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. A25-E1-06
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