A3A Lighted Pushbutton Switch
Compact High-capacity Push-button Switch
- Ideal for use as a high breaking capacity Power Switch.
- Switches from micro load (minimum applicable load: 5 VDC 1mA) to high capacity load.
Model | 2D/3D CAD | |
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A3AA-90A1-00R | Download | |
A3AA-91A1-00R | Download | |
A3AT-91A1-00A | Download | |
A3AT-91K1-00A | Download | |
A3AT-91K1-00B | Download | |
A3AT-91K1-00D | Download | |
A3AT-91K1-00G | Download | |
A3AT-91K1-00H | Download | |
A3AT-91K1-00L | Download | |
A3AT-91K1-00R | Download | |
A3AT-91K1-00Y | Download | |
A3AT-91L1-00A | Download | |
A3AT-91L1-00B | Download | |
A3AT-91L1-00D | Download | |
A3AT-91L1-00G | Download | |
A3AT-91L1-00H | Download | |
A3AT-91L1-00L | Download | |
A3AT-91L1-00R | Download | |
A3AT-91L1-00Y | Download |

SPST-NO
Appearance | Terminal | Action | Illumination | Model | Color |
---|---|---|---|---|---|
Solder | Momentary | Non-lighted | A3AA-90K1-00□ | ( Non-lighted) 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 |
|
Surface illumination | A3AA-90K1-00E□ | ||||
Alternate | Non-lighted | A3AA-90L1-00□ | |||
Surface illumination | A3AA-90L1-00E□ | ||||
PCB | Momentary | Non-lighted | A3AA-91K1-00□ | ||
Surface illumination | A3AA-91K1-00E□ | ||||
Alternate | Non-lighted | A3AA-91L1-00□ | |||
Surface illumination | A3AA-91L1-00E□ | ||||
Solder | Momentary | Non-lighted | A3AT-90K1-00□ | ||
Surface illumination | A3AT-90K1-00E□ | ||||
Alternate | Non-lighted | A3AT-90L1-00□ | |||
Surface illumination | A3AT-90L1-00E□ | ||||
PCB | Momentary | Non-lighted | A3AT-91K1-00□ | ||
Surface illumination | A3AT-91K1-00E□ | ||||
Alternate | Non-lighted | A3AT-91L1-00□ | |||
Surface illumination | A3AT-91L1-00E□ |
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. |
Appearance | Terminal | Action | Illumination | Model | Color |
---|---|---|---|---|---|
Solder | Momentary | Non-lighted | A3AA-90A1-00□ | 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 |
|
Surface illumination | A3AA-90A1-00E□ | ||||
Alternate | Non-lighted | A3AA-90B1-00□ | |||
Surface illumination | A3AA-90B1-00E□ | ||||
PCB | Momentary | Non-lighted | A3AA-91A1-00□ | ||
Surface illumination | A3AA-91A1-00E□ | ||||
Alternate | Non-lighted | A3AA-91B1-00□ | |||
Surface illumination | A3AA-91B1-00E□ | ||||
Solder | Momentary | Non-lighted | A3AT-90A1-00□ | ||
Surface illumination | A3AT-90A1-00E□ | ||||
Alternate | Non-lighted | A3AT-90B1-00□ | |||
Surface illumination | A3AT-90B1-00E□ | ||||
PCB | Momentary | Non-lighted | A3AT-91A1-00□ | ||
Surface illumination | A3AT-91A1-00E□ | ||||
Alternate | Non-lighted | A3AT-91B1-00□ | |||
Surface illumination | A3AT-91B1-00E□ |
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 □ 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. |
Contact Ratings
|
Resistive load | ||||||
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General load | 1a | 6 A at 125 VAC 2 A at 250 VAC |
4 A at 30 VDC | ||||
1c | 3 A at 125 VAC |
2 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%RH 3. Operating frequency: 20 times/minute |
LED Ratings
Illumination Item |
LED Surface Illumination | |||
---|---|---|---|---|
Red | Yellow | Green | ||
Forward voltage VF | Standard value | 2.0 V | 2.1 V | 2.1 V |
Maximum value | 3 V | |||
Forward current IF | Maximum value | 20 mA | 20 mA | 25 mA |
Permissible loss PD | Absolute max. value | 60 mW | 60 mW | 75 mW |
Reverse voltage VR | Absolute max. value | 3 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. |
Characteristics
Operating frequency |
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Insulation resistance | 100 MΩ min. (at 500 VDC with insulation tester) | ||||||||
Contact resistance (initial value) | 100 mΩ max. | ||||||||
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.) |
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Vibration resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude (See note 3.) | ||||||||
Shock resistance | Destruction: 500 m/s2 max. Malfunction: 150 m/s2 (See note 3.) |
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Durability |
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Weight | Approx. 3.2 g | ||||||||
Ambient operating temperature |
−10°C to +55°C (with no icing or condensation) | ||||||||
Ambient operating humidity | 35% to 85%RH | ||||||||
Ambient storage temperature | −25°C to +65°C (with no icing or condensation) | ||||||||
Degree of protection | IEC IP40 | ||||||||
Electric shock protection class | Class II | ||||||||
PTI (proof tracking index) | 175 | ||||||||
Pollution degree | 3 (IEC60947-5-1) |
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. |
Contact Form
Contact name | Contact form |
---|---|
SPST-NO | |
SPDT |
(Unit: mm)
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. | |
3. | Unless specified, there is a tolerance of ±0.4mm for dimensions. |
Square Pushbutton
Round Pushbutton
LED Surface Illumination Models
Square Pushbutton
Round Pushbutton
Terminals
Solder terminal | PCB terminal | |
---|---|---|
SPST -NO |
||
SPDT |
Correct Use
Please do not perform wiring or touch the charged parts of terminals while power is supplied to the Switch.Doing so may result in electric shock.
Make sure to keep a secure insulationdistance after wiring to the Switch.
●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 mechanism 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 surface 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.
●Example
Conditions: Red LED with an IF of -10 mA at 24 V and a Ta of 25°C. From the red LED characteristic below, VF will be 2 V when IF is 10 mA. Therefore, R = (24 V - 2 V)/0.01 A = 2,200 Ω. Thus the recommended resistance is 2.2 kΩ at 0.5 W (2* x IF2R).
●Pushbutton
When exchanging the Pushbutton (except the ones for the mechanical 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 paint when marking legend.
●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.