New Product
Plateau Head Pushbutton Switch
A3U
Easy connector enables less assembly and less wiring
• Highly reliable Major Omron basic switch, SS model built in.
• Possible cross over wiring on circuit construction.
• Easy one push to connect the Operation and Switch Units.
• 22 dia of the push button head size is suitable for operation.
Model Number Structure
Model Number Legend....
For information on combinations, refer to Ordering Information.
A3U
(1)
-T
(2) (3)
-
(4)
A
(5)
C-
( 6)
M
Lighted
(Cap type/Color)
Transparent Cap/White
−
Transparent Cap/Red
Transparent Cap/Yellow
Transparent Cap/Green
Transparent Cap/White
Transparent Cap/Blue
−
−
Non-Lighted
(Cap type/Color)
Non-Transparent Cap/White
Transparent Cap/White
Transparent Cap/Red
Transparent Cap/Yellow
Transparent Cap/Green
−
Transparent Cap/Blue
Non-Transparent Cap/Black
Transparent Cap/Black
(4) Voltage Used (LED)
Symbol
No symbol
1
2
3
Operating Voltage
Non-lighted
5 VDC
12 VDC
24 VDC
(1) Lighted/Non-lighted
Symbol
No symbol
L
Type
Non-lighted
Lighted
(3) Color of Pushbutton and Light
Symbol
W
S
R
Y
G
U
A
B
K
Color
White
White
Red
Yellow
Green
Umber
Blue
Black
Black
(5) Contact Configuration
Symbol
1
2
Type
SPDT
DPDT
(2) Flange Color
Symbol
B
M
Color
Black
Metallic
(6) Degree of Protection
Symbol
None
5
Protection
IP40
IP65 (Oil-proof type)
Ordering Information
Plateau Head Pushbutton Switches
Degree of Protection : IP40
Flange Color: Black
Lighting Output
LED
Voltage
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
−
−
Model
A3UL-TB@-1A1C-M
A3UL-TB@-2A1C-M
A3UL-TB@-3A1C-M
A3UL-TB@-1A2C-M
A3UL-TB@-2A2C-M
A3UL-TB@-3A2C-M
A3UL-TBG-1A1C-M
A3UL-TBG-2A1C-M
A3UL-TBG-3A1C-M
A3UL-TBU-1A1C-M-S
A3UL-TBU-2A1C-M-S
A3UL-TBU-3A1C-M-S
A3UL-TBG-1A2C-M
A3UL-TBG-2A2C-M
A3UL-TBG-3A2C-M
A3UL-TBU-1A2C-M-S
A3UL-TBU-2A2C-M-S
A3UL-TBU-3A2C-M-S
A3UL-TB@-1A1C-M
A3UL-TB@-2A1C-M
A3UL-TB@-3A1C-M
A3UL-TB@-1A2C-M
A3UL-TB@-2A2C-M
A3UL-TB@-3A2C-M
A3U-TB@-A1C-M
A3U-TB@-A2C-M
@Pushbutton
color symbol
Flange Color: Metallic
Lighting Output
LED
Voltage
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
−
−
Model
A3UL-TM@-1A1C-M
A3UL-TM@-2A1C-M
A3UL-TM@-3A1C-M
A3UL-TM@-1A2C-M
A3UL-TM@-2A2C-M
A3UL-TM@-3A2C-M
A3UL-TMG-1A1C-M
A3UL-TMG-2A1C-M
A3UL-TMG-3A1C-M
A3UL-TMU-1A1C-M-S
A3UL-TMU-2A1C-M-S
A3UL-TMU-3A1C-M-S
A3UL-TMG-1A2C-M
A3UL-TMG-2A2C-M
A3UL-TMG-3A2C-M
A3UL-TMU-1A2C-M-S
A3UL-TMU-2A2C-M-S
A3UL-TMU-3A2C-M-S
A3UL-TM@-1A1C-M
A3UL-TM@-2A1C-M
A3UL-TM@-3A1C-M
A3UL-TM@-1A2C-M
A3UL-TM@-2A2C-M
A3UL-TM@-3A2C-M
A3U-TM@-A1C-M
A3U-TM@-A2C-M
@Pushbutton
color symbol
SPDT
SPDT
W, A
DPDT
W, A
DPDT
G
SPDT
U
LED
G
DPDT
U
G
SPDT
U
LED
G
DPDT
U
SPDT
SPDT
R, Y
DPDT
W, S, R, Y,
G, A, B, K
Non-
lighted
SPDT
DPDT
R, Y
DPDT
Non-
lighted
SPDT
DPDT
W, S, R, Y,
G, A, B, K
1
A3U
Degree of Protection : IP65 (Oil-proof Type)
Flange Color: Black
Lighting Output
LED
Voltage
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
−
−
Model
A3UL-TB@-1A1C-5M
A3UL-TB@-2A1C-5M
A3UL-TB@-3A1C-5M
A3UL-TB@-1A2C-5M
A3UL-TB@-2A2C-5M
A3UL-TB@-3A2C-5M
A3UL-TBG-1A1C-5M
A3UL-TBG-2A1C-5M
A3UL-TBG-3A1C-5M
A3UL-TBU-1A1C-5M-S
A3UL-TBU-2A1C-5M-S
A3UL-TBU-3A1C-5M-S
A3UL-TBG-1A2C-5M
A3UL-TBG-2A2C-5M
A3UL-TBG-3A2C-5M
A3UL-TBU-1A2C-5M-S
A3UL-TBU-2A2C-5M-S
A3UL-TBU-3A2C-5M-S
A3UL-TB@-1A1C-5M
A3UL-TB@-2A1C-5M
A3UL-TB@-3A1C-5M
A3UL-TB@-1A2C-5M
A3UL-TB@-2A2C-5M
A3UL-TB@-3A2C-5M
A3U-TB@-A1C-5M
A3U-TB@-A2C-5M
@Pushbutton
color symbol
Flange Color: Metallic
Lighting Output
LED
Voltage
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
−
−
Model
A3UL-TM@-1A1C-5M
A3UL-TM@-2A1C-5M
A3UL-TM@-3A1C-5M
A3UL-TM@-1A2C-5M
A3UL-TM@-2A2C-5M
A3UL-TM@-3A2C-5M
A3UL-TMG-1A1C-5M
A3UL-TMG-2A1C-5M
A3UL-TMG-3A1C-5M
A3UL-TMU-1A1C-5M-S
A3UL-TMU-2A1C-5M-S
A3UL-TMU-3A1C-5M-S
A3UL-TMG-1A2C-5M
A3UL-TMG-2A2C-5M
A3UL-TMG-3A2C-5M
A3UL-TMU-1A2C-5M-S
A3UL-TMU-2A2C-5M-S
A3UL-TMU-3A2C-5M-S
A3UL-TM@-1A1C-5M
A3UL-TM@-2A1C-5M
A3UL-TM@-3A1C-5M
A3UL-TM@-1A2C-5M
A3UL-TM@-2A2C-5M
A3UL-TM@-3A2C-5M
A3U-TM@-A1C-5M
A3U-TM@-A2C-5M
@Pushbutton
color symbol
SPDT
SPDT
W, A
DPDT
W, A
DPDT
G
SPDT
U
LED
G
DPDT
U
G
SPDT
U
LED
G
DPDT
U
SPDT
SPDT
R, Y
DPDT
W, S, R, Y,
G, A, B, K
Non-
lighted
SPDT
DPDT
R, Y
DPDT
Non-
lighted
SPDT
DPDT
W, S, R, Y,
G, A, B, K
Accessories and Tools (Sold Separately)
Accessories
Accessory
Appearance
Type
Model number
Remarks
Used to plug a panel cutout hole for fu-
ture expansion.
Do not use it on a panel cutout hole that
will be used to position a Switch and en-
sure that the Switch will not rotate. Use
this Plug for a 25-dia. panel cutout hole.
Refer to page 6 for information on panel
cutout holes.
The color is black.
Panel Plug
A22Z-3530
25-dia. Ring
Round
A22Z-R25
Used together with a Panel Plug.
Cap Removal Suction
Cup
A3UZ-3010
Used to remove a cap.
Harness
A3UZ-5010-10
Used to connect to a connector.
Lead length: 1 m
Tools
Tool
Appearance
Type
Model number
Remarks
Tightening Tool
−
A22Z-3905
Used to tighten nuts from the back of
the panel and to replace caps on Light-
ed Emergency Stop Switches.
2
A3U
Specifications
Approved Standard Ratings
Certification Authority
Certification no.
Rating
File no.
UL (See Note: 1 and Note: 2)
UL508
CSA C22.2 No.14
30 VDC 0.1 A
E41515
CSA (See Note: 1 and Note: 2)
CSA C22.2 No. 14
30 VDC 0.1 A
2650068
TÜV (See Note: 3)
EN60947-5-1
12 30 VDC 0.1 A
J50236157
Note: 1.
Only Switch Blocks are recognized by UL/CSA. (Surrounding air Temperature: 55
°C)
Note: 2.
Please use the power supply specified in UL/CSA class 2.
Note: 3.
Use 4A 250V as short-circuit protective device when using under EN-compliant rating standard (IEC60127-2 SS1).
Ratings
Contacts
30 VDC, 0.1 A (Resistive load)
Minimum applicable load: 1 mA at 5 VDC
Rated values are obtained from tests conducted under the following conditions.
1. Load: Resistive load
2. Mounting conditions: No vibration and no shock
3. Temperature: 20
±
2
°C
4. Operating frequency: 20 operations/min
Super-bright LED
Rated voltage
5 VDC
12 VDC
24 VDC
15 mA
Rated current
Operating voltage
5 VDC
±
5 %
12 VDC
±
5 %
24 VDC
±
5 %
Characteristics
Item
Allowable Mechanical
operating
frequency Electrical
Insulation resistance
Contact resistance
Between terminals of
same polarity
Between terminals of
different polarity
Dielectric
strength
Between each
terminal and ground
Between all LED terminals
and all the other terminals
Vibration
Malfunction
resistance
Shock
Malfunction
resistance
Mechanical
Durability
Electrical
Connector holding force
Rated insulation voltage (Ui)
Electric shock protection class
Degree of contamination
Between terminals of
same polarity
Impulse
Between terminals of
withstand
different polarity
voltage
Between each
terminal and ground
Conditional short-circuit current
Conventional enclosed thermal
current (Ithe)
Weight
Degree of protection
Ambient operating temperature
Ambient operating humidity
Ambient storage temperature
Ambient storage humidity
Pushbutton Switch
60 operations/minute max.
30 operations/minute max.
100 MΩ min. (at 500 VDC)
250 mΩ max. (initial value)
500 VAC, 50/60 Hz for 1 minute
500 VAC, 50/60 Hz for 1 minute
1,500 VAC, 50/60 Hz for 1 minute
500 VAC, 50/60 Hz for 1 minute
Operating Characteristics
Features
Operating force (OF) max.
Pretravel (PT) max.
Total travel (TT) max.
4.5 N
3.3 mm
3.7 mm
A3U
Circuit Diagram
CN
1
2
3
SW1
TOP VIEW
10 to 55 Hz, 1.5-mm double amplitude
(malfunction within 1 ms)
300 m/s
2
max. (malfunction within 1 ms)
1,000,000 operations min.
200,000 operations min.
40 N max.
30 V (EN60947-5-1)
Class II
3 (EN60947-5-1)
4
5
6
7
8
9
10
R
LED
SW2
800 V (EN60947-5-1)
Note3
1. This circuits shows the lighted/bipolar type.
2. SW2 isn't mounted on 1 pole type.
3. An LED and R aren't mounted on the non-lighted type.
100A (EN60947-5-1)
0.1A (EN60947-5-1)
Approx. 30 g
IP40, IP65 (Oil-proof type)
-20
°C
to 70
°C
(Non-lighted type)
-20
°C
to 55
°C
(lighted type)
(with no icing or condensation)
35 % to 85 % RH
-40
°C
to 70
°C
(with no icing or condensation)
35 % to 85 % RH
3
A3U
Dimensions
A3U
22 dia.
Directionality display
( mark)
Connector B10B-PASK (JST)
Terminal No.
(unit: mm)
28.2 dia.
29
1.8
17
46.8
2
Pushbutton Unit
49.8
Mouthing
nut
Lot. No.
Switch unit
Lock ring
Marking
Safety Precautions
Refer to Safety Precautions for All Pushbutton Switches/Indicators.
Precautions for Safe Use
•
Do not disassemble or modify the Switch under any
circumstances. Doing so may cause malfunction.
•
Do not drop or subject the Switch to extreme shock or force.
This may prevent the Switch from functioning to its full capability.
•
The durability of the Switch varies considerably depending on the
switching conditions. Always test the switch under actual working
conditions before application and use the Switch only for the
number of switching operations allowed.
•
Do not allow the load current to exceed the rated value. This may
damage or burn out the Switch.
•
Refer to the Circuit Diagram and make sure to wire correctly. Only
the terminal (1) is printed and the right end of the terminal is read
as (10).
The switch back
Terminal (1)
Rubber washer
30
Operation Unit.
2. For a Switch with IP65 protection, make sure that the rubber
washer is in place between the Operation Unit and the panel.
3. Align the Lock Ring with the slot on the case and insert it so that
the edge is flush with the panel.
4. Tighten the Mounting Nut to between 0.98 and 1.96
.
5. To mount the Switch Unit to the Operation Unit, align the the
triangle marks on the Operation Unit and Switch Unit and insert
the Switch Unit until it locks securely in place.
6. The push marks on both sides are only for removal. Do not push
them when you insert the Switch Unit into the Pushbutton Unit.
Otherwise, the Pushbutton Unit will be hooked incorrectly.
7. To remove the Switch, press the levers on both sides in the
direction indicated by PUSH marks. Applying too much force
may damage the Switch.
8. Remove the Switch Unit before you remove the Pushbutton Unit.
If you loosen the mounting nut while the Switch Unit is still
attached, you will damage the Pushbutton Unit.
Lock Ring
Triangle Mark
Lever
•
Do not use the Switch in locations where explosive or flammable
gases or liquid may be present or scattered. The electric ark or the
heat caused by switching contacts may trigger off a fire or
explosion.
•
Do not use the Switch in locations where toxic gases, such as H
2
S,
SO
2
, NH
3
, HNO
3
, and Cl
2
, may be present, or in locations subject
to high temperature or humidity. Doing so may damage the Switch
due to contact failure or corrosion.
•
Do not let the Switch submerged in oil or water, or use in locations
continuously subject to splashes of oil/water. Doing so may result
in oil or water entering the Switch.
•
Do not use the Switch in the following locations;
- subject to severe temperature changes.
- subject to high humidity or condensation.
- subject to severe vibration or shock.
- where direct rays of the sun strike.
- where sea breeze may be present.
•
When the Switch is exposed to the environment that are not
required, or stored in locations where condensation presents, or
damaged by fall out, or stored for more than an year, please test it
under the usage conditions before application.
•
Mounting and Removing the Switch
1. Insert the Operation Unit from the front of the panel, insert the
Lock Ring and Mounting Nut from the back of the panel, and
tighten the Mounting Nut. Then, attach the Switch Unit to the
Tab
Operation Unit
Mounting Nut
Panel
Switch Unit
4
A3U
•
Wiring
1. Do not wire the Switch while power is being supplied. Doing so
may result in electric shock.
2. Make sure to insert the connector to the end. This may prevent
the Switch from functioning to its full capability.
3. Do not subject the Switch to an excessive force when wiring. Fix
the cables first to avoid the connector and cables from being
pulled with. Otherwise, the connector may be disassembled or
damaged, resulting in the contact damages.
Too much tension
to the cables.
Appropriate force
to the cables.
2) Attach the cap, aligning the slots on the slot on the cap with the
tab on the operation plunger.
Cutout Portions
Cap
Operation Plunger
Protruding Portions
4. Refer to specification of each connector or catalogue for details
of installing or wiring the terminal side of the connector.
Recommended connector;
Manufacture
J.S.T. Mfg Co.
Name
Contact
Housing
Model
SPHD-002T-P0.5
SPHD-001T-P0.5
PAP-10V-S
Applicable lead wire
AWG#28 to 24
AWG#26 to 22
AWG#28 to 22
•
Character Films
1) In addition to engraving characters on legend plungers, you can
insert a character film to display characters.
Applicable Character Film Size
19±0.1
1.1
+0.2
0
20±0.1 dia.
19±0.1
1.1
+0.2
0
•
Choose the applicable contact to the wire.
Precautions for Correct Use
•
Attaching and Removing Caps and Legend Plungers
Removal
1) Use the A3UZ-3010 Cap Removal Suction Cup (sold
separately) to remove the cap.
(Unit: mm)
Thickness: 0.2 mm max.
Recommended material: Polyethylene
Note: A Character Film is not included with the product.
2)The following figure shows the tabs on the legend plunger that
are used to position the character film.
Tabs for character
film positioning
Character film
2) After you remove the cap, you can remove the legend plunger
and engrave it.
You cannot remove the legend plungers from Switches with
IP65 protection.
Attachment
1) The legend plunger fits in only one direction. Align the tabs on
the legend plunger with the slots on the operation plunger and
press the cap onto the operation plunger.
Operation Plunger
Legend Plunger
Cap
Insert the legend plunger so that
the groove widths are lined up.
5
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