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Lighted PushButton Switch
Cylindrical 12mm dia. Pushbutton Series with Superb Operability, High Visibility and Compact Housing
Three models of pushbutton units (round, square and rectangular), two types of light-emitting elements (LED and lamp) and two types of switch units (switching general-purpose and microcurrent/ voltage loads) available. Models that can be used as an indicator also available. Requires only 20mm mounting depth. All LEDs, lamps, lenses and legends replaceable without tools. Degree of protection conforms to IP40. UL (E41515) and CSA (LR45258-31) approved.
A3C
Ordering Information
Illuminated types
When placing your order, specify the individual component part model numbers of the screen, LED/lamp and switch unit as listed in the ordering tables below. Screen LED LED/Lamp Incandescent Lamp Switch Unit
A3C--500-
A3B-0---
A3B-0---
A3C--7--M2C--7---*
* Model number unique for indicator unit
Screen
LED Illuminated
Shape Rectangular Square Round
Incandescent Lamp Illuminated
Shape Rectangular Square Round
Button colour Red Yellow Green White Note: A3CJ-500R A3CJ-500Y A3CJ-500GY A3CJ-500W A3CA-500R A3CA-500Y A3CA-500GY A3CA-500W A3CT-500R A3CT-500Y A3CT-500GY A3CT-500W
Button colour Red Yellow Green White Blue A3CJ-500R A3CJ-500Y A3CJ-500G A3CJ-500W A3CJ-500A A3CA-500R A3CA-500Y A3CA-500G A3CA-500W A3CA-500A A3CT-500R A3CT-500Y A3CT-500G A3CT-500W A3CT-500A
1. With the exception of green, all screens can be used with either LED or incandescent lamps. Since the hue of green changes with an incandescent light source, use the green LED light source listed elsewhere.
Illumination Source
LED
Rated voltage Colour Red Yellow Green White 5VDC 12VDC 24VDC
A3B-005R A3B-005Y A3B-005G A3B-005W
A3B-012R A3B-012Y A3B-012G A3B-012W
A3B-024R A3B-024Y A3B-024G A3B-024W
Incandescent lamp
Rated voltage All Colours Model 6VDC 14VDC 18VDC 28VDC
A3B-006
A3B-014
A3B-018
A3B-028
Switch Unit
Degree of protection Appearance Rectangular IP40 Square Round
Configuration General p p purpose Micro-load
Contact
SPST-NO+ SPST-NC
Switch action Momentary Alternate Momentary y Alternate
Terminal Solder Solder PCB Solder PCB Solder PCB
Indicator
A3CJ-7011 A3CJ-7021 A3CJ-7111 A3CJ-7112 A3CJ-7121 A3CJ-7122 M2CJ-7001 M2CJ-7002
A3CA-7011 A3CA-7021 A3CA-7111 A3CA-7112 A3CA-7121 A3CA-7122 M2CA-7001 M2CA-7002
A3CT-7011 A3CT-7021 A3CT-7111 A3CT-7112 A3CT-7121 A3CT-7122 M2CT-7001 M2CT-7002
Specifications
Contact Ratings
Type General purpose load Micro* current/voltage load Note: AC resistive load 0.5A, 250VAC 1A, 125VAC 0.1A, 125VAC DC resistive load 1A, 30VDC 0.1A, 30VDC
Applicable load range
* The minimum permissible load is 1mA, 5VDC.
LED Ratings
Rated voltage 5 VDC 12 VDC 24 VDC Rated current 30mA 15mA 10mA Operating voltage 5VDC 5% 12VDC 5% 24VDC 5%
Lamp Ratings
Rated voltage 6V 14V 18V 28V Rated current 60mA 40mA 26mA 24mA Operating voltage 5V 12V 15V 24V
Current (mA) Note: The load range shown above is applicable only during the standard conditions.
Voltage (VDC)
Characteristics
Operating frequency Mechanical Electrical Insulation resistance Dielectric strength Momentary-action type: 120 operations per minute max. Alternate-action type: 60 operations per minute max. 20 operations/minute max. 100M min. (at 500VDC) 1,000VAC, 50/60Hz for 1 minute between terminals of same polarity 2,000VAC, 50/60Hz for 1 minute between terminals of different polarity and also between each terminal and ground Malfunction Durability Malfunction Ambient temperature Humidity Life expectancy Life expectancy Weight Mechanical Electrical 10 to 55Hz, 1.5mm double amplitude Approx. 500m/s2 (50G) Approx. 150m/s2 (15G) Operating: -10_C to 55_C 35 to 85% RH Momentary-action type: 1,000,000 operations min. Alternate-action type: 100,000 operations min. 100,000 operations min. Approx. 5g
Vibration Shock
Operating Characteristics
OF max. RF min. TT LTA min. PT max. 250g 30g 3.50.5mm 0.5mm 2.5mm
Approved by Standards
UL (File No.E41515) CSA (File No. LR45258-31)
Dimensions
Rectangular A3CJ Panel cutout
Note:
Recommended panel thickness is 1.0 to 3.2mm.
Square A3CA
Panel cutout
Note:
Recommended panel thickness is 1.0 to 3.2mm.
Round A3CT
Panel cutout
Note:
Recommended panel thickness is 1.0 to 3.2mm.
Legend plate A3CJ
A3CA
A3CT
Note:
1
The thickness is 0.8mm
2. Since the legend plate is made of polycarbonate, use alcohol-based paints such as melanin, phthalic acid or acryl paint when marking the legend.
Terminals/Connections
Type Terminal SPST-NO+SPST-NC Lighted type For Indication Indicator
Solder Terminal
Lamp terminal 0.3t
Lamp terminal 0.3t
Terminal hole
Terminal hole
(Bottom view)
(Bottom view)
Lighted type
Indicator
Lamp terminal 0.3t
Lamp terminal 0.3t
PCB Terminal
Mounting hole (Bottom view) (Bottom view)
Mounting hole (Bottom view) (Bottom view)
Accessories (Order Separately)
Name Socket Shape Classification Wire-wrap terminal PCB terminal Solder terminal Switch guard Rectangular Model A3C-4101 A3C-4102 A3C-4103 A3CJ-5050 - Remarks -
Tightening tool
-
A3C-3004
Useful for mounting switch units one after another. Do not over-tighten.
Assembly/Disassembly
Mounting and Replacing Pushbutton Unit
Mounting directions for the LED/lamp and Screen
The OMRON screen doubles the roles in which a pushbutton switch is normally used. The screen may be inserted one of two ways: 1. For operation as a lighted pushbutton switch, fit the LED/lamp so that its guide projection is inserted into the wider opening in the receptacle of the screen. Projection LED/lamp guide
Removing the pushbutton unit
While holding the recessed portions on both sides, firmly and steadily pull out the top of the screen with your thumb and forefinger. Pulling out the cap with pliers or a similar tool will damage the cap.
Recess
Mounting the switch unit on panel
Nut mounting * Insert the switch unit from the front of the panel and tighten the
mounting nut inserted from the rear of the panel.
LED/lamp guide
* * *
Since a projection exists on the rear portion of the switch unit, if the mounting unit cannot be fitted into position, turn the nut slightly. The tightening torque of the mounting nut should be less than 5kg-cm. Solder the terminals after mounting the nut. Otherwise, the terminals, when thickened by solder, may prevent the nut from being screwed down onto the switch unit.
2. For operation as an indicator unit, insert the LED/lamp guide projection into the narrower opening in the indicator unit's receptacle. Push the projection of the LED/lamp in the groove of the screen so that the LED/lamp is firmly inserted into the screen of the indicator unit. LED/lamp guide
Wiring * Finish soldering within 5 seconds with a 30 watt soldering
Groove of the indicator unit iron, or within 3 seconds at a solder temperature of 240_C. Do not apply any force to the switch unit for about a minute after soldering, to avoid deforming the softened plastic base of the switch unit.
*
Projection of the LED/lamp Note: The inserting direction of the LED/lamp for the screen is opposite to that for the indicator unit. Pay attention to the mounting direction of the legend plate.
Use a non-corrosive, resin-based soldering flux.
Construction
Lens
Legend plate Reflection plunger
Screen
LED/lamp
Switch unit
Nut

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