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. RoHS Compliant A 3 A Refer to Safety Precautions for All Pushbutton Switches and Safety Precautions on page 8. List of Models Non-lighted Push-button Switches Appearance Lighted Push-button Switches Model Illumination A3AA-9@ @1-00@ Square Appearance Model Square A3AA-9@ @1-00E@ Round A3AT-9@ @1-00E@ LED surface illumination A3AT-9@ @1-00@ Round 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 (5) Color Symbol Shape A Square T Round 1. Pushbutton (Non-lighted Models) Symbol Color L Light gray (2) Terminal R Red* Symbol Type Y Yellow* 0 Solder G Green* 1 PCB A Blue B Black D Dark gray H Gray (3) Switch Specifications Symbol Operation A Momentary B Alternate K Momentary L Alternate Contact type SPDT VAC, ( 32AAatat125 30 VDC ) SPST-NO 6 A at 125 VAC, 2 A at 250 VAC, 4 A at 30 VDC ( ) 2. LED (Surface Illumination Models) (4) Illumination Symbol Operation 00 Non-lighted 00E Surface illumination Symbol * Specifications: Refer to page 3. Accessories: Refer to page 2. Color R Red Y Yellow G Green Common to both lighted and non-lighted models. Dimensions: Refer to page 5. 1 A3A Lighted Pushbutton Switch List of Models SPST-NO Appearance Terminal Operation Square/A3AA Illumination Model Non-lighted A3AA-90K1-00@ LED surface illumination A3AA-90K1-00E@ Color symbol for pushbutton Minimum packing unit (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) 100 Momentary Solder Non-lighted A3AA-90L1-00@ LED surface illumination A3AA-90L1-00E@ Non-lighted A3AA-91K1-00@ LED surface illumination A3AA-91K1-00E@ Non-lighted A3AA-91L1-00@ LED surface illumination A3AA-91L1-00E@ Non-lighted A3AT-90K1-00@ LED surface illumination A3AT-90K1-00E@ Non-lighted A3AT-90L1-00@ LED surface illumination A3AT-90L1-00E@ Non-lighted A3AT-91K1-00@ LED surface illumination A3AT-91K1-00E@ Non-lighted A3AT-91L1-00@ LED surface illumination A3AT-91L1-00E@ Alternate Momentary PCB Alternate A 3 A Round/A3AT Momentary Solder Alternate Momentary PCB Alternate 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 Terminal Operation Square/A3AA Illumination Model Non-lighted A3AA-90A1-00@ LED surface illumination A3AA-90A1-00E@ Non-lighted A3AA-90B1-00@ LED surface illumination A3AA-90B1-00E@ Non-lighted A3AA-91A1-00@ LED surface illumination A3AA-91A1-00E@ Non-lighted A3AA-91B1-00@ LED surface illumination A3AA-91B1-00E@ Non-lighted A3AT-90A1-00@ LED surface illumination A3AT-90A1-00E@ Non-lighted A3AT-90B1-00@ LED surface illumination A3AT-90B1-00E@ Color symbol for pushbutton Minimum packing unit (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) 100 Momentary Solder Alternate Momentary PCB Alternate Round/A3AT Momentary Solder Alternate Non-lighted A3AT-91A1-00@ LED surface illumination A3AT-91A1-00E@ Non-lighted A3AT-91B1-00@ LED surface illumination A3AT-91B1-00E@ Momentary PCB Alternate Accessories Flange (Select according to panel color.) Name Shape Classification Square @12.7 Model Black A3A-241 Light gray A3A-242 Black A3A-251 Light gray A3A-252 Minimum packing unit Flange alone Round 12.7 Leaf spring Flange Square @12.7 Round 12.7 Flange and leaf spring (one each) A3A-200 Black A3A-211 Light gray A3A-212 Black A3A-221 Light gray A3A-222 100 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 Lighted Pushbutton Switch Specifications Approved Standards Characteristics * SPST-NO UL CSA * SPDT 6 A at 125 VAC 3 A at 125 VAC 2 A at 250 VAC 2 A at 30 VDC Operating frequency 4 A at 30 VDC Type Contact form General load SPST-NO AC resistive load DC resistive load 6 A at 125 VAC 2 A at 250 VAC 4 A at 30 VDC Note: Minimum allowable load: 5 VDC 1 mA (Resistive) The ratings given above are for testing under the following conditions: (1) Ambient temperature: 20 2C (2) Ambient humidity: 65 5% (3) Operating frequency: 20 times/minute LED Illumination Forward voltage VF Standard value (V) * (IF = 10 mA) Yellow Green 2.0 2.1 2.1 Maximum value (V) Forward current IF 3.0 Maximum value (mA) 20 20 25 Permissible loss PD Maximum value (mW) 60 60 75 Reverse voltage VR Maximum value (V) 3 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 VF - IF characteristic graphs on page 8. Operating Characteristics 100 M min. (at 500 VDC) * Dielectric strength Vibration resistance Shock resistance OF max. 2.45 N Release force RF min. 0.15 N Total travel TT Pretravel PT max. 1.5 mm Locktravel alternate * LTA min. 0.5 mm Approx. 2mm Between terminals of same polarity 600 VAC, 50/60 Hz for 1 min Between each terminal and ground 2,000 VAC, 50/60 Hz for 1 min Malfunction 10 to 55 Hz, 1.5-mm double amplitude *2 Destruction 500 m/s2 Malfunction 150 m/s2 *2 Mechanical Momentary action: 1,000,000 operations min. Alternate action: 50,000 operations min. *1 Electrical Approx. 3.2 g Ambient operating temperature -10C to +55C (with no icing) Ambient operating humidity 35% to 85% Ambient storage temperature -25C to +65C (with no icing) Degree of protection IP00 Electric shock protection class Class II PTI (proof tracking index) 175 Pollution degree 3 (IEC947-5-1) *2. A 3 A 50,000 operations min. Weight *1. Operating force 20 operations/minute max. 100 m max. (initial value) Surface illumination Red Electrical Contact resistance Durability Item Momentary action: 120 operations/minute max. Alternate action: 60 operations/minute max. *1 Insulation resistance Ratings Item Mechanical With alternate operation models, one operation cycle consists of set and reset operations. Indicates malfunctions of less than 1 ms. Contact Form Contact name Contact form Double-break SPST-NO Double-throw SPDT Contact type NO Alternate operation models only. NO NC COM NO 3 A3A Lighted Pushbutton Switch Nomenclature Model Structure <Pushbutton> 1. Shape Square (A3AA) 4.Color cap Round (A3AT) 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 Leaf spring 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) 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 Lighted Pushbutton Switch Dimensions (Unit: mm) Non-lighted Model Square Pushbutton SPST-NO SPDT Square push-button @8.9 1.7 1.7 1 1 Round Pushbutton 12.5 3.5 12.5 3.5 18 18 Round push-button 15.2 Three, t0.4 terminals Two, t0.4 terminals 12.7 A 3 A 8.9 dia. Surface Illumination Model Square Pushbutton SPST-NO SPDT Square push-button @8.9 1.7 1.7 1 12.5 1 12.5 Round Pushbutton 3.5 3.5 18 18 Round push-button Three, t0.4 terminals 15.2 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. 5 A3A Lighted Pushbutton Switch Terminals Contact Solder terminal PCB terminal Terminal Hole Non-lighted Models Dimensions Non-lighted Models 1 Lighted Models Switch terminal: t0.4 1 1 2 3.5 3.5 0.8 3.5 1.7 0.5 1 2 SPST-NO 0.8 A 3 A Switch terminal: t0.4 Lamp terminal: t0.3 3.5 0.5 1.7 Switch terminal: t0.4 Switch terminal: t0.4 Lamp terminal: t0.3 Terminal Arrangement (BOTTOM VIEW) 0.8 x 2 PCB Dimensions (BOTTOM VIEW) Holes for models with illuminating push-button Terminal for models with an illuminating push-button LED terminal Terminal for models with an illuminating push-button LED terminal 0.6 1.7 0.6 1.7 Lighted Models Four, 1 dia. holes (0.67) 10.16 NO 4.48 NO 10.16 4.48 10.16 4.48 NO (1.87) 10.16 NO 10.16 (2.52) (2.52) 10.16 Terminal Hole Dimensions Non-lighted Models Non-lighted Models Lighted Models Switch terminal: t0.4 2 3.5 1 0.8 0.5 0.8 0.6 3.5 0.6 1.7 1.7 1.7 Switch terminal: t0.4 LED terminal: t0.3 Switch terminal: t0.4 Lighted Models Switch terminal: t0.4 Lamp terminal: t0.3 Terminal Arrangement (BOTTOM VIEW) 2 L+ 0.8 0.5 0.8 PCB Dimensions (BOTTOM VIEW) Five, 1-dia. holes LED terminal 1 SPDT 3.5 Holes for models with illuminating push-button L5.7 3.5 5.7 1.7 NC NO C 1.95 LED terminal 1.95 NC L+ 10.16 L5.7 NC NO C 1.95 10.16 6 C (2.54) 10.16 NO A3A Lighted Pushbutton Switch Accessories Dimensions Leaf Spring A3A-200 Flange (Square) A3A-24@ Flange (Round) 15 12.7 12.7 dia. 13 9.1 9.1 dia. A3A-25@ 12.2 1 1 t = 0.3 2.5 7.8 1.0 (10.1) 7.8 1.0 (10.1) 5.4 11.6 11.6 5.4 A 3 A Note: Unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions. Panel Cutouts Square Pushbutton For Side-by-side Mounting Panel Mounting Dimensions Square pushbutton Round pushbutton +0.2 11.5 0 +0.2 11.5 -0 15.3 min. 11.5 +0.2 0 Horizontal multiple mounting Round Pushbutton Panel * 11.5 +0.2 -0 1 11.5 +0.2 -0 3.8 min. Flange dia. 15.3 min. Leaf spring 14.5 max. +0.2 11.5 0 dia. +0.2 11.5 -0 dia. 11.5 +0.2 -0 Vertical multiple mounting +0.3 12.7(n-1)+11.5 -0 * Recommended panel thickness: 1 to 1.6 mm 12.7 min. (The diagram shows the lighted SPST-NO model.) 7 A3A Lighted Pushbutton Switch Precautions Refer to the "Push-button Switches Common Precautions" for correct use. Precautions for 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 insulation distance after wiring to the Switch. Mounting * When opening a hole on a panel to mount an A3A to the panel, make sure A that the hole has no burr. 3 * When mounting a flange to the A 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 350C 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. R= 8 E-VF IF 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 IF of -10 mA at 24 V and a Ta of 25C. 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 . Thus the recommended resistance is 2.2 k at 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 - IF Characteristics) Ta: Ambient Temperature (Red) IF 50 (mA) 20 Ta = 25C 10 5.0 2.0 1.0 0.5 0.2 0.1 1.0 1.5 2.0 2.5 3.0 VF (V) (Yellow) 50 IF (mA) 20 Ta = 25C 10 5.0 2.0 1.0 0.5 0.2 0.1 1.0 1.5 2.0 2.5 3.0 VF (V) (Green) 50 IF (mA) 20 Ta = 25C 10 5.0 2.0 1.0 0.5 0.2 0.1 1.0 1.5 2.0 2.5 3.0 VF (V) 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. A3A Lighted Pushbutton Switch Installation Mounting and Replacing the Pushbutton 1. Mounting Direction for the Pushbutton and Switch 2. Removing the Pushbutton (Non-lighted Models Only) * 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. * 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.) * 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. A 3 A Catches on the Pushbutton Grooves in the Switch Catch LED terminals Mounting Switch on a Panel 1. 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. (It will be easier mounting the leaf spring of one side first, then mount the other side.) 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. 2. Mount Flange on Panel * Insert the flange from the front surface of the panel. Flange Panel Guide 3. 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 housing, and fit the rectangular hole of the flange with the projections of the switch housing. 4. 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 * The flange has two opposing guides to facilitate its insertion into the panel cutout hole. Be sure the flange does not remain tilted with respect to the panel surface after being installed. Cross Section Flat-bladed screwdriver or tweezers Support Flange Panel Panel (t = 1 to 1.6 mm) Note: The mounting direction of the flange determines the orientation of the Switch. Projection Note: Completely remove any burrs on the panel cutout surface; otherwise, the flange and Switch will not attach solidly. Note: Do not pry up the flange support more than necessary or the switch holding portions may be damaged. 9 A3A Lighted Pushbutton Switch A 3 A * Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product. * Consult your OMRON representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or equipment, and be sure to provide the system or equipment with double safety mechanisms. Note: Do not use this document to operate the Unit. OMRON Corporation Electronic and Mechanical Components Company 10 Contact: www.omron.com/ecb Cat. No. A025-E1-05 0812(0207)(O)