OMRONElectronics TechnicalHelpDesk on 0181-450 4646 1
Lighted PushButton Switch A3D
Cylindrical8mm dia.Subminiature
Series Featuring Short Mounting Depth
Round,square and rectangularLEDpushbutton
units.
Indicatortypesalso available.
Requiresonly18mm mounting depth.
Efficiencyinwiringimprovedbyterminalsarranged
on the samelevel.
All LEDs,lamps,lensesand legendsreplaceable
without tools.
Degree ofprotection conformstoIP40.
Ordering Information
Illuminatedtypes Pushbutton UnitSwitchUnit
A3D---500-
M2D---500-*
*Modelnumberunique for
indicatorunit
A3D---7---
M2D---7---*
*Modelnumberunique for
indicatorunit
When placing yourorder,specifythe individual
componentpartnumbersof the pushbutton unit, LED,
lamp and switch unit, aslisted inthe ordering tables
below.
Pushbutton Unit
Lightedtype,Built-in LED
S
h
a
p
e
Button
colour
R
e
c
t
a
n
g
u
l
a
r
S
q
u
a
r
e
R
o
u
n
d
RedA3DJ--500RA3DA--500RA3DT--500R
YellowA3DJ--500Y A3DA--500Y A3DT--500Y
GreenA3DJ--500GY A3DA--500GY A3DT--500GY
WhiteA3DJ--500WA3DA--500WA3DT--500W
Indicator
Shape
Button
colour
R
e
c
t
a
n
g
u
l
a
r
S
q
u
a
r
e
R
o
u
n
d
RedM2DJ--500RM2DA--500RM2DT--500R
YellowM2DJ--500YM2DA--500YM2DT--500Y
GreenM2DJ--500GYM2DA--500GYM2DT--500GY
WhiteM2DJ--500WM2DA--500WM2DT--500W
SwitchUnitDegree ofprotection IP40
Appearance RectangularSquareRound
Switch
Contactconfiguration Terminalaction
SPST--NO+SPST--NC MomentarySolderA3DJ--7111 A3DA--7111 A3DT--7111
P
S
T
-
-
N
O
+
S
P
S
T
-
-
N
C
o
m
e
n
t
a
r
y
PCB A3DJ--7112 A3DA--7112 A3DT--7112
AlternateSolderA3DJ--7121 A3DA--7121 A3DT--7121
l
t
e
r
n
a
t
e
PCB A3DJ--7122 A3DA--7122 A3DT--7122
ForIndication (withoutswitch)SolderM2DJ--7001 M2DA--7001 M2DT--7001
o
r
I
n
d
i
c
a
t
i
o
n
(
w
i
t
h
o
u
t
s
w
i
t
c
h
)
PCB M2DJ--7002 M2DA--7002 M2DT--7002
Card
ReadersRelays Lighted
PushbuttonsMicro
Switches Switches
DIPMechanical
Key Switches
Opto--
Switches
A3D
A3D
LEADERSINELECTRONIC COMPONENTS
2
Specifications
ContactRatings
DC (Resistive load)0.1A,30VDC
Note:The minimumpermissibleload is1mA,5VDC
Built-in LED Ratings
ItemLEDcolourRedYellow Green
ForwardvoltageVFStandardvalue*1.7V2.2V1.7V
o
r
w
a
r
d
v
o
l
t
a
g
e
V
F
Max.value2.0V2.5V2.0V
ForwardcurrentIFStandardvalue*20mA20mA20mA
o
r
w
a
r
d
c
u
r
r
e
n
t
I
F
Absolutemax.value50mA50mA50mA
Permissibleloss PDAbsolutemax.value100mW125mW122mW
Reverse voltageVRAbsolutemax.value4V4V4V
*RefertoVFvs. IFcharacteristics inHintson CorrectUse.Because no resistorisincorporated inthe LED,connectan appropriate external
resistancewithinthe abovelimit.
Applicableloadrange
Note:The load range shown aboveisapplicable onlyduring
the standardconditions.
Voltage (VDC)
Current(mA)
Characteristics
Operating frequency MechanicalMomentary-action type:120 operationsperminutemax.
Alternate-action type:60 operationsperminutemax.
Electrical20 operations/minutemax.
Insulation resistance 100MWmin.(at500VDC)
Dielectric strength1,000VAC,50/60Hzfor1minute between terminalsofsame polarity
2,000VAC,50/60Hzfor1minute between terminalsofdifferentpolarityand also between each
terminaland ground
Vibration Malfunction 10 to 55Hz,1.5mm double amplitude
Shock Destruction Approx.500m/s2(50G)
h
o
c
k
Malfunction Approx.150m/s2(15G)
Ambient temperatureOperating:--10_Cto 55_C
Humidity35 to 85%RH
Life expectancy MechanicalMomentary-action type:1,000,000 operationsmin.
Alternate-action type:100,000 operationsmin.
Electrical100,000 operationsmin.
WeightApprox.3g
Operating Characteristics
OFmax.250g
RFmin.20g
TT 3.5¦0.5mm
LTAmin.0.5mm
PTmax.2.5mm
A3DA3D
OMRONElectronics TechnicalHelpDesk on 0181-450 4646 3
Dimensions
Rectangular
A3DJ/M2DJ
Panelcutout
Square
A3DA/M2DA Panelcutout
Round
A3DT/M2DT
Legend plate
A3DJA3DA A3DT
Note:1.The thickness is0.8mm
2.Sincethe legend plateismade ofpolycarbonate,use alcohol-based paints such asmelanin,phthalicacid oracrylpaintwhen marking the legend.
Panelcutout
Card
ReadersRelays Lighted
PushbuttonsMicro
Switches Switches
DIPMechanical
Key Switches
Opto--
Switches
A3D
A3D
LEADERSINELECTRONIC COMPONENTS
4
Terminals/Connections
SPST--NOIndicator
Type
Terminal
LightedtypeIndicator
Terminalhole(Bottomview)
Terminalhole(Bottomview)
(Bottomview)(Bottomview)
Mounting hole
(Bottomview)Mounting hole
(Bottomview)
LightedtypeIndicator
PCB
Terminal
Solder
Terminal
LEDterminal0.3t
LEDterminal
0.3t
LEDterminal
0.3tLEDterminal0.3t
Accessories(OrderSeparately)
NameShapeClassification ModelRemarks
SocketWire-wrap terminalA3D--4101 Cannotbe used withinsulation
o
v
e
r
o
c
k
e
t
PCBterminalA3D--4102
a
n
n
o
t
b
e
u
s
e
d
w
i
t
h
i
n
s
u
l
a
t
i
o
n
cover
SolderterminalA3D--4103
Tightening tool-- A3D--3004 Usefulformounting switch
unitsone afteranother.Do not
over-tighten.
A3DA3D
OMRONElectronics TechnicalHelpDesk on 0181-450 4646 5
Assembly/Disassembly
Mounting directionsforswitchand pushbutton
unit
1. Insert the pushbutton unitinthe switch unitsothat the circular
shaped clawoutside the projection of the switch unitmates
withthe clawon the upperpartof the switch unit.
2.The pressure applied during the insertion should be 2.5kg
max.
Note:If the LEDterminal isbent , itmaynotalign withthe mating
hole.Beforeinsertion,check tosee ifanyLEDterminal is
bentand,ifso,straighten it. The inserting direction of the
LEDforthe pushbutton unitisoppositetothat forthe indica-
torunit. Payattention tothe mounting direction of the legend
plate.
Projection
Curved claw
Removing thepushbutton unit
While holding the recessedportionsonbothsides,firmlyandsteadily
pull out the top of the pushbutton unitwithyourthumb and forefinger.
Pulling out the cap with pliersorasimilartoolwill damage the cap.
Recessed
portions
Mounting the switch uniton panel
Nutmounting
·Insert the switch unit fromthe frontof the paneland tighten the
mounting nutinserted fromthe rearof the panel.
·Sinceaprojection existsontherearportion ofthe switchunit, ifthe
mounting unitcannotbe fitted into position, turnthe nutslightly.
·The tightening torque of the mounting nutshould be less than
5kg--cm.
·Solderthe terminalsaftermounting the nut. Otherwise, the
terminals,when thickened by solder,mayprevent the nut from
being screwed down ontothe switch unit.
PanelMounting nut
Construction
Lens
Legend plate
Diffuse plate
LED
Switch unit
Nut
Pushbutton
unit
Wiring
·Finishsoldering within 5 secondswith a 30 watt soldering iron,or
within 3 secondsatasoldertemperature of240_C.To avoid
deforming the softened plastic switch unitbase,do notapplyany
forcetothe switch unit foraboutaminute aftersoldering.
·Use a non-corrosive,resin-based soldering flux.
Hintson CorrectUse
LED
·Because no resistorisincorporated inthe LEDof the lighted
pushbutton switch,connectan appropriate externalresistor.
·Makesurethat the resistance of the resistoriswithinthe
permissiblerange determined bythe LEDcharacteristics.The
forwardcurrentof the LEDmustbe 8mAminimum.
·The resistance of the externalresistorcan be obtained bythis
equation:R=E--VF/IF(W)
where,
E:operating voltage (V)
VF:LEDforwardvoltage (V)
IF:LEDforwardcurrent(mA)
Determine the resistance of the externalresistorthatsatisfiesthe
characteristics of the LED.However, the average LEDforward
currentmustbe 8mAormore.
·Example ofresistancecalculation
When using a red LED whereE=24V, IF=20mAand Ta=25_C,
fromthe VFvs. IFcharacteristics on the right, forwardvoltage VF
is1.7V,when 20mAof IFflowsthrough the LED.Substituting
thesevaluesforthe variablesinthe above equation,
R=24(V) -- 1.7(V)=1111(W)
0.02(A) (or20mA) (or1.1kW)
Therefore, the estimated resistanceis1kW,1W.