Lighted Pushbutton Switch
A3B
General Purpose and Micro-Voltage/Current
Load Switch
Requires only 22 mm mounting depth
■ All LEDs, lamps, legends and pushbutton units
replaceable without tools
■ Oil-resistant version (satisfies IP65)
also available, making it ideal for
machine tools subject to oil splashes
■
Ordering Information
Round
Rectangular
Square
■ PUSHBUTTON UNITS
Lighted Switches
Switch Type
LED
Degree of Sealing
IP40
Oil-tight IP65
Incandescent
Lamps
IP40
Oil-tight IP65
Color
Red
Yellow
Green*
White
Red
Yellow
Green*
White
Green*
Part Number
Round
A3BT-500R
A3BT-500Y
A3BT-500GY
A3BT-500W
A3BT-510R
A3BT-510Y
A3BT-510GY
A3BT-510W
A3BT-500G
Rectangular
A3BJ-500R
A3BJ-500Y
A3BJ-500GY
A3BJ-500W
A3BJ-510R
A3BJ-510Y
A3BJ-510GY
A3BJ-510W
A3BJ-500G
Square
A3BA-500R
A3BA-500Y
A3BA-500GY
A3BA-500W
A3BA-510R
A3BA-510Y
A3BA-510GY
A3BA-510W
A3BA-500G
Blue
Green*
Blue
A3BT-500A
A3BT-510G
A3BT-510A
A3BJ-500A
A3BJ-510G
A3BJ-510A
A3BA-500A
A3BA-510G
A3BA-510A
* Note: With the exception of green, all pushbutton units can be used with either LED or incandescent lamps. To avoid an undesirable
hue change with green pushbutton units, use a green LED lamp with a green LED pushbutton and an incandescent lamp with
a green incandescent pushbutton.
A3B
A3B
Round
Rectangular
Square
■ PUSHBUTTON UNITS
Non-Lighted/Mushroom Type Switches
Switch Type
Convex
Degree of Sealing
IP40
Oil-tight IP65
Color
Red
Yellow
Green
White
Blue
Black
Red
Yellow
Green
White
Blue
Black
Part Number
Round
A3BT-502R
A3BT-502Y
A3BT-502G
A3BT-502W
A3BT-502A
A3BT-502B
A3BT-512R
A3BT-512Y
A3BT-512G
A3BT-512W
A3BT-512A
A3BT-512B
Rectangular
A3BJ-502R
A3BJ-502Y
A3BJ-502G
A3BJ-502W
A3BJ-502A
A3BJ-502B
A3BJ-512R
A3BJ-512Y
A3BJ-512G
A3BJ-512W
A3BJ-512A
A3BJ-512B
Square
A3BA-502R
A3BA-502Y
A3BA-502G
A3BA-502W
A3BA-502A
A3BA-502B
A3BA-512R
A3BA-512Y
A3BA-512G
A3BA-512W
A3BA-512A
A3BA-512B
LED
Incandescent
■ LAMPS
Type
LED Light
Incandescent Lamp
Color
Red
Yellow
Green*
White
Part Number
5 VDC
A3B-005R
A3B-005Y
A3B-005G
A3B-005W
14 V
A3B-014
12 VDC
A3B-012R
A3B-012Y
A3B-012G
A3B-012W
28 V
A3B-028
24 VDC
A3B-024R
A3B-024Y
A3B-024G
A3B-024W
* Note: With the exception of green, all pushbutton units can be used with either LED or incandescent lamps. To avoid an undesirable
hue change with green pushbutton units, use a green LED lamp with a green LED pushbutton and an incandescent lamp with
a green incandescent pushbutton.
Rectangular
Standard
Rectangular
Large Flange
Rectangular ThreeDirection Barrier
Square
Standard
Round
Standard
■ SWITCH UNITS
IP40 Cases
Part Number
Rectangular
Application Contacts
Switch Action Terminal Standard
GeneralSPST-NO + Momentary
Solder
A3BJ-7011-1
purpose
SPST-NC
Alternate
–
A3BJ-7021-1
DPST-NO + Momentary
–
A3BJ-7031-1
DPST-NC
Alternate
–
A3BJ-7041-1
Micro-load SPST-NO + Momentary
Solder
A3BJ-7111-1
SPST-NC
PCB
A3BJ-7112-1
Alternate
Solder
A3BJ-7121-1
PCB
A3BJ-7122-1
DPST-NO + Momentary
Solder
A3BJ-7131-1
DPST-NC
PCB
A3BJ-7132-1
Alternate
PCB
A3BJ-7141-1
PCB
A3BJ-7142-1
For indication (without switch unit)
Solder
M2BJ-7001-1
PCB
M2BJ-7002-1
Note: 1.
2.
3.
4.
2
Large flange
A3BP-7011-1
A3BP-7021-1
A3BP-7031-1
A3BP-7041-1
A3BP-7111-1
A3BP-7112-1
A3BP-7121-1
A3BP-7122-1
A3BP-7131-1
A3BP-7132-1
A3BP-7141-1
A3BP-7142-1
M2BP-7001-1
M2BP-7002-1
3-dir. barrier
A3BK-7011-1
A3BK-7021-1
A3BK-7031-1
A3BK-7041-1
A3BK-7111-1
A3BK-7112-1
A3BK-7121-1
A3BK-7122-1
A3BK-7131-1
A3BK-7132-1
A3BK-7141-1
A3BK-7142-1
M2BK-7001-1
M2BK-7002-1
Square
Standard
A3BA-7011-1
A3BA-7021-1
A3BA-7031-1
A3BA-7041-1
A3BA-7111-1
A3BA-7112-1
A3BA-7121-1
A3BA-7122-1
A3BA-7131-1
A3BA-7132-1
A3BA-7141-1
A3BA-7142-1
M2BA-7001-1
M2BA-7002-1
Round
Standard
A3BT-7011-1
A3BT-7021-1
A3BT-7031-1
A3BT-7041-1
A3BT-7111-1
A3BT-7112-1
A3BT-7121-1
A3BT-7122-1
A3BT-7131-1
A3BT-7132-1
A3BT-7141-1
A3BT-7142-1
M2BT-7001-1
M2BT-7002-1
Can be used for both lighted and non-lighted units, except indicator.
Models A3BP and A3BK are available in micro-load and indication types.
These switch units usually are mounted with a nut. However, an optional leaf spring for snap-in mounting is also available.
The switch unit bears UL and CSA markings to indicate the standards by which the switch unit is recognized. The SEV marking
can also be marked on the switch unit if requested.
A3B
A3B
IP65 Cases (Oil Tight)
Part Number
Rectangular
Application Contacts
Switch Action Terminal Standard
GeneralSPST-NO + Momentary
Solder
A3BJ-7011-3
purpose
SPST-NC
Alternate
Solder
A3BJ-7021-3
DPST-NO + Momentary
Solder
A3BJ-7031-3
DPST-NC
Alternate
Solder
A3BJ-7041-3
Micro-load SPST-NO + Momentary
Solder
A3BJ-7111-3
SPST-NC
PCB
A3BJ-7112-3
Alternate
Solder
A3BJ-7121-3
PCB
A3BJ-7122-3
DPST-NO + Momentary
Solder
A3BJ-7131-3
DPST-NC
PCB
A3BJ-7132-3
Alternate
Solder
A3BJ-7141-3
PCB
A3BJ-7142-3
For indication (without switch unit)
Solder
M2BJ-7001-3
PCB
M2BJ-7002-3
Note: 1.
2.
3.
4.
Socket
Large flange
A3BP-7011-3
A3BP-7021-3
A3BP-7031-3
A3BP-7041-3
A3BP-7111-3
A3BP-7112-3
A3BP-7121-3
A3BP-7122-3
A3BP-7131-3
A3BP-7132-3
A3BP-7141-3
A3BP-7142-3
M2BP-7001-3
M2BP-7002-3
3-dir. barrier
A3BK-7011-3
A3BK-7021-3
A3BK-7031-3
A3BK-7041-3
A3BK-7111-3
A3BK-7112-3
A3BK-7121-3
A3BK-7122-3
A3BK-7131-3
A3BK-7132-3
A3BK-7141-3
A3BK-7142-3
M2BK-7001-3
M2BK-7002-3
Square
Standard
A3BA-7011-3
A3BA-7021-3
A3BA-7031-3
A3BA-7041-3
A3BA-7111-3
A3BA-7112-3
A3BA-7121-3
A3BA-7122-3
A3BA-7131-3
A3BA-7132-3
A3BA-7141-3
A3BA-7142-3
M2BA-7001-3
M2BA-7002-3
Round
Standard
A3BT-7011-3
A3BT-7021-3
A3BT-7031-3
A3BT-7041-3
A3BT-7111-3
A3BT-7112-3
A3BT-7121-3
A3BT-7122-3
A3BT-7131-3
A3BT-7132-3
A3BT-7141-3
A3BT-7142-3
M2BT-7001-3
M2BT-7002-3
Can be used for both lighted and non-lighted pushbutton units, except indicator.
Models A3BP and A3BK are available in micro-load and indication types.
These switch units usually are mounted with a nut. However, an optional leaf spring for snap-in mounting is also available.
The switch unit bears UL and CSA markings to indicate the standards by which the switch unit is recognized. The SEV marking
can also be marked on the switch unit if requested.
Switch Guard
Dust Cover
Snap-in Mounting
Leaf Spring
Insulation
Cover
Panel Plug
Tightening Tool
Extractor
Legend Plate
■ ACCESSORIES
Part
Socket
Remarks
Cannot be used with insulation cover.
Classification
Wire-wrap terminal
PCB terminal
Solder terminal
Remarks
Cannot be used with protective dust cover.
Cannot be used for A3BP switch unit.
Cannot be used with switch guard.
Cannot be used for A3BP switch unit.
Cannot be used with mounting nut.
Round
A3BT-5050
Rectangular
A3BJ-5050
Square
A3BA-5050
A3BT-5060
A3BJ-5060
A3BA-5060
Cannot be used with socket.
To reserve a hole cutout on a panel for future mounting.
Convenient for ganged installation. Do not overtighten.
Aids in getting a non-slip grip when removing keytops.
A3B-3002
A3BT-3003
A3B-3004
A3PJ-5080
A3BJ-3003
A3BA-3003
Remarks
A single legend plate
is included with the
standard unit.
Part Number
Round
A3BT-5201
A3BT-5202
A3BT-5203
Rectangular
A3BJ-5201
A3BJ-5202
A3BJ-5203
Square
A3BA-5201
A3BA-5202
A3BA-5203
■ ACCESSORIES
Part Number
A3B-4101
A3B-4102
A3B-4103
Part Number
Part
Switch Guard
Protective Dust Cover
Snap-in Mounting
Leaf Spring
Insulation Cover
Panel Plug
Tightening Tool
Extractor
Part
Legend Panel
Type
Dust Proof
IP40
Oil-resistant
IP65
A3B-3001
Opacity
White
Transparent
Transparent
3
A3B
A3B
Specifications
■ CONTACT RATINGS
Type
General purpose load
Micro-voltage/current load
AC Resistant Load
0.5 A, 250 VAC
1 A, 125 VAC
0.1 A, 125 VAC
DC Resistant Load
1A, 30 VDC
0.1 A, 30 VDC
Note: The minimum applicable load is 1 mA at 5 VDC.
■ LED RATINGS
Rated Voltage
5 VDC
12 VDC
24 VDC
Rated Current
30 mA
15 mA
10 mA
Operating Voltage
5 VDC ± 5%
12 VDC ± 5%
24 VDC ± 5%
Note: All switch models listed have a built-in current limiting resistor (for use with LED).
■ LAMP RATINGS
Rated Voltage
14 V
28 V
Rated Current
40 mA
24 mA
Operating Voltage
12 V
24 V
■ APPROVALS
UL (File No. E41515) / CSA (File No. LR45258)
Type
General purpose load
Micro-voltage/current load
Rating
3 A, 250 VAC
5 A, 125 VAC
1 A, 30 VAC
0.1 A, 125 VAC
0.1 A, 30 VDC
SEV (File No. D2.21/407)
Type
—
Rating
5 A, 250 VAC
Note: The rated values approved by each of the safety standards (e.g. UL, CSA) may be different from the performance
characteristics individually defined in this catalog.
4
A3B
A3B
Characteristics
Operating frequency
Mechanical
Momentary action type: 120 operations per minute max.
Alternate action type: 60 operations per minute max.
20 operations per minute max.
100 MΩ min. (at 500 VDC)
50 MΩ max. 6-8 VDC at rated current or 1A
100 MΩ max. 6-8 VDC/0.1A
1,000 VAC, 50/60 Hz for 1 minute between terminals of same polarity
2,000 VAC, 50/60 Hz for 1 minute between terminals of different polarity and also
between each terminal and ground
10 to 55 Hz, 1.5 mm double amplitude
Electrical
Insulation resistance
Contact resistance
General type
Micro-load type
Dielectric strength
Vibration
Mechanical/
malfunction durability
Mechanical durability
Malfunction durability
Operating
Shock
Ambient temperature
Humidity
Service life
500 m/s2 approx. (50 G)
50 m/s2 approx. (15 G)
-10° to 55° C
35% to 85% RH
Momentary action type: 1,000,000 operations per min.
Alternate action type: 100,000 operations per min.
See “Characteristic Data”
Approx. 7 g
Mechanical
Electrical
Weight (see note)
Note: The weight indicated is for the lighted type (DPST-NO + DPST-NC).
■ CHARACTERISTIC DATA
Applicable load range
Electrical service life
General purpose and
high capacity load
125 VAC resistive load p.f. = 1
10
Micro voltage/current load
10
Zone 0
Zone 1
Zone 2 Zone 3
Operations (x 104)
Voltage (VDC)
10
Zone 4
1
250 VAC resistive load p.f. = 1
5
5 mW
0.1W 0.2W
0.3W
0.1
0.1 0.16
0.5
1
5
10
50 100
500
0
1
Current (mA)
2
3
4
5
Switching Current (A)
Note: The load range shown above is applicable only during the standard conditions.
■ OPERATING CHARACTERISTICS
Contacts
Operating force (OF) max.
Releasing force (RF) min.
Total Travel (TT)
Pretravel (PT) max.
Lock stroke (LTA) min. (see note)
A3B■
■ -7■
■ ■ ■-1
■
SPST-NO
+
SPST-NC
250 g
30 g
Approx. 3.5 mm
2.5 mm
0.5 mm
DPST-NO
+
DPST-NC
350 g
30 g
Approx. 3.5 mm
2.5 mm
0.5 mm
A3B■
■ -7■
■ ■ ■-3
■
SPST-NO
+
SPST-NC
400 g
30 g
Approx. 3.5 mm
2.5 mm
0.5 mm
DPST-NO
+
DPST-NC
500 g
30 g
Approx. 3.5 mm
2.5 mm
0.5 mm
Note: LTA denotes the distance from the free position (FP) to where the actuator locks after it reaches the operating position (OP).
5
A3B
A3B
Dimensions
Unit: mm (inch)
■ SWITCH UNITS
The following dimensions are applicable to the switch units with solder terminals and SPST-NO+SPST-NC contact configuration:
A3BJ (M2BJ), with standard pushbutton unit*
Panel cutout (top view)
(for mounting switch unit only)
* Use an optional leaf spring to snap-in mount
the switch unit. At this time, the panel cutout
changes to 16.2 dia + 0.3, -0 mm.
A3BA (M2BA), with standard pushbutton unit*
Panel cutout (top view)
* Use an optional leaf spring to snap-in mount
the switch unit. At this time, the panel cutout
changes to 16.2 dia + 0.3, -0 mm.
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
2. Recommended panel thickness is 1.0 to 3.2 mm.
3. Use sockets when mounting many switch units in a matrix.
6
A3B
A3BT (M2BT), with standard pushbutton unit*
A3B
Panel cutout (top view)
* Use an optional leaf spring to snap-in mount
the switch unit. At this time, the panel cutout
changes to 16.2 dia + 0.3, -0 mm.
A3BP, with large flange pushbutton unit*
Panel cutout (top view)
* A switch guard and dust-protective cover
cannot be attached.
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
2. Recommended panel thickness is 1.0 to 3.2 mm.
3. Use sockets when mounting many switch units in a matrix.
7
A3B
A3B
Unit: mm (inch)
A3BK, with 3-direction pushbutton unit
Panel cutout (top view)
A3BJ, with mushroom pushbutton unit
Panel cutout (top view)
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
2. Recommended panel thickness is 1.0 to 3.2 mm.
3. Use sockets when mounting many switch units in a matrix.
8
A3B
A3B
A3BA, with mushroom pushbutton unit
Panel cutout (top view)
A3BT, with mushroom pushbutton unit
Panel cutout (top view)
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
2. Recommended panel thickness is 1.0 to 3.2 mm.
3. Use sockets when mounting many switch units in a matrix.
9
A3B
A3B
Unit: mm (inch)
■ SOLDER TERMINALS
10
SPST-NO+SPST-NC
DPST-NO+DPST-NC
Lighted type
Lighted type
Indicator
Dimensions of terminal holes
Dimensions of terminal holes
Dimensions of terminal holes
Terminal arrangement
(bottom view)
Terminal arrangement
(bottom view)
Terminal arrangement
(bottom view)
A3B
A3B
■ PCB TERMINALS
SPST-NO+SPST-NC
DPST-NO+DPST-NC
Lighted/Non-lighted type
Lighted/Non-lighted type
Indicator
Terminal arrangement
(bottom view)
Terminal arrangement
(bottom view)
Terminal arrangement
(bottom view)
Mounting hole
(bottom view)
Mounting hole
(bottom view)
Mounting hole
(bottom view)
■ LEGEND PLATE
A3BJ
A3BA
A3BT
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
2. Recommended panel thickness is 0.6 mm.
3. The materials used in the switches are polycarbonate resin in products satisfying P40, and polyarirate resin in products satisfying
P65.
11
A3B
A3B
Unit: mm (inch)
■ WITH SOCKET MOUNTED
(The following dimensions are applicable to the rectangular type.)
Wire-wrap terminal
PCB terminal
Solder terminal
Mounting hole
(bottom view)
Terminal hole
Note: When mounting the socket, the side of the socket groove is the L+ terminal side.
■ WITH INSTALLED SWITCH GUARD
Rectangular
12
Panel cutout
Square, Round
Panel cutout
A3B
A3B
■ WITH MOUNTED DUST COVER
Round
Panel cutout
Tightening tool
A3B-3004
13
A3B
A3B
■ WITH ATTACHED INSULATION COVER
(The following dimensions are applicable to the rectangular
pushbutton unit.)
After mounting the switch unit on a panel, and after tightening the
mounting nut, insert the lead wires into the hole on the insulation
cover before wiring. Align the insulation cover so that the
cylindrical portion of the insulation cover will face the switch unit.
This means that the lead wires will be inserted from the barrier side
of the insulation cover. After wiring has been completed, slide the
insulation cover over the switch unit.
■ PANEL PLUG
Select the panel plug which best
compliments the design of the
mounting panel. The dimensions of
the hole cutout for the panel plugs are
the same as those of the switch unit.
Rectangular
Square
Round
Assembly/Disassembly
■ MOUNTING AND REPLACING THE
PUSHBUTTON UNIT
Mounting directions of the LED/lamp and pushbutton unit
The Omron pushbutton unit doubles the roles in which a
pushbutton switch is normally used. The pushbutton unit 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 pushbutton unit.
14
(2) For operation as an indicator unit:
Insert the LED/lamp guide into the narrower opening
in the indicator's receptacle.
A3B
A3B
■ REMOVING THE PUSHBUTTON UNIT
With your thumb and forefinger, while holding the recessed
portions on both sides, firmly and steadily pull out the top of the
pushbutton unit.
Pulling out the cap with pliers or a similar tool will damage the cap.
Mounting
■ NUT MOUNTING
• Insert the switch unit from the front of the panel (a rubber seal is
provided for the IP65 type only) and tighten the mounting nut
inserted from the rear of the panel.
• Since a projection exists on the rear portion of the switch unit, if
the mounting nut 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.
■ SNAP-IN MOUNTING
• Fit the spring mounting clip for snap-in mounting
to the switch unit.
• Insert the tab of the spring mounting clip into the
two grooves on the threaded part of the switch
unit.
• Be sure to use the two spring mounting clips.
Ensure that each tab is firmly inserted onto the
grooves.
• Do not use the spring mounting clips for the
switch unit conforming to IP65. The rubber seal
may not be held in close enough contact to
prevent the inflow of liquid. Use a nut to secure
the switch.
• Insert the switch unit from the front of the panel,
and push until you hear the clips snap into place.
■ SOCKET MOUNTING
• After mounting the switch unit on the panel, secured by the
mounting nut, attach the socket to the switch unit.
• In doing so, make sure that the projection on the switch unit fits
in the positioning hole (at the wider side) of the socket.
Hints on Correct Use
Refer to HINTS ON CORRECT USE under the General Information section.
15
A3B
OMRON ELECTRONICS, INC.
OMRON CANADA, INC.
One East Commerce Drive
Schaumburg, IL 60173
885 Milner Avenue
Scarborough, Ontario M1B 5V8
1-800-55-OMRON
416-286-6465
Cat. No. GC SW5
16
A3B
4/98
Specifications subject to change without notice.
Printed in the U.S.A.
