A3D Lighted Pushbutton Switch (Cylindrical 8-dia.)
Lighted Pushbutton Switch with Cylindrical 18-mm × 8-dia. Body
- Excellent illumination with even surface brightness.
- Cylindrical body means panel cutouts can be made easily.
- Combines miniature design with excellent operating sensitivity.
Ordering as a Set
The model numbers used to order sets of Units are given in the following table. One set comprises the Pushbutton (LED lamp built-in), and Switch.
|Appearance||Degree of protection||Operation||Model number||Color symbol for
|Minimum packing unit|
|IP40||Momentary||A3DJ-90A1-00E□||R, Y, G, W||10 pcs|
|Note:||1.||Enter the desired color symbol for the Pushbutton in □.|
|2.||All the above are solder-terminal, microload, SPST-NO, LED lamp-lighted models.|
Pushbuttons and Switches can be ordered separately. Combinations that are not available as sets can be created using individual Units.
Ordering: Specify a model number from the following table.
|Minimum packing unit|
|Minimum packing unit|
|SPST-NO||Momentary||Solder terminals||A3DJ-7111||A3DA-7111||A3DT-7111||10 pcs|
Contact Rating: 30 VDC, 0.1 A (Minimum Applicable Load: 5 VDC, 1 mA)
|Note:||1.||Minimum allowable load: 5 VDC 1 mA (Resistive)|
|2.||The ratings given above are for testing under the following conditions:
1) Ambient temperature: 20 ± 2°C
2) Ambient humidity: 65 ± 5%RH
3) Operation frequency: 20 times/minute
Built-in LED Lamp
|Forward voltage, VF||Reference value
(See note 3.)
|1.85 V||2.1 V||2.3 V|
|Maximum value||2.2 V||2.4 V||2.5 V|
|Forward current, IF||Reference value||20 mA||20 mA||20 mA|
|Absolute maximum value||50 mA||30 mA||30 mA|
|Permissible dissipation, PD||Absolute maximum value||110 mW||72 mW||75 mW|
|Reverse voltage, VR||Absolute maximum value||5 V||5 V||5 V|
|Note:||The built-in LED lamp has no limiting resistor and so it is necessary to connect an external resistor within the range shown in the above table.
(For details of calculation formulas, refer to page 8.)
|*1.||Refer to Engineering Data on page 4.|
|*2.||The same LED lamp is used for both yellow illumination and white illumination and so the ratings are the same.|
|Operating frequency||Mechanical: Momentary operation models:120 operations/minute max.Alternate operation models: 60 operations/minute max.( *1)
Electrical: 20 operations/minute max.
|Contact Resistance (initial value)||100mΩ max.|
|Insulation resistance||100 MΩ min. (at 500 VDC with insulation tester)|
|Dielectric strength||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 between each terminal and ground|
|1,000 VAC, 50/60 Hz for 1 minute between lamp terminals (*2)|
|Vibration resistance||Malfunction: 10 to 55 Hz, 1.5 mm double amplitude (*3)|
|Shock resistance||Destruction: 500 m/s2 max.
Malfunction: 150 m/s2 max. (*3)
Momentary operation models: 1,000,000 operations min.
Alternate operation models: 100,000 operations min.(*1)
(One operation consists of set and reset operations.)
|Electrical: 100,000 operations min.|
|Weight||Approx. 3 g|
|Ambient operating temperature||−10°C to 55°C (with no icing or condensation)|
|Ambient operating humidity||35% to 85%|
|Ambient storage temperature||−25°C to 65°C|
|Degree of protection||IEC IP40|
|Electric shock protection class||Class II|
|PTI (proof tracking index)||175|
|Pollution degree||3 (IEC947-5-1)|
|Note:||*1.||With alternate operation models, one operation cycle consists of set and reset operations.|
|*2.||The figure is for when the LED lamp is not mounted.|
|*3.||Indicates malfunctions of less than 1 ms.|
|Operating force||OF max.||2.45 N|
|Release force||RF min.||0.196 N|
|Total travel||TT||Approx. 3.5 mm|
|LTA min.||0.5 mm|
|Pretravel||PT max.||2.5 mm|
|Note:||*.||Alternate operation models only.|
|Contact name||Contact form|
Always make sure that the power is turned OFF before mounting, removing, or wiring the Switch, or performing maintenance.
Do not tighten the mounting ring excessively using pliers or a similar tool. Excessive tightening may damage the mounting ring. (Tighten- ing torque: 0.20 to 0.29 Nm)
When wiring, use wires of a size appropriate for the applied voltage and carry current. Perform soldering correctly under the conditions given below. Using the Switch with the wires soldered incorrectly may cause the terminals to become abnormally hot and cause a fire.
1 Hand soldering: Soldering iron tip temperature: 350°C max. within 3 seconds.
2 Dip soldering: At 350°C within 3 seconds.
Wait for one minute after soldering before exerting any external force on the solder.
Use a non-corrosive rosin liquid for the flux.
Perform wiring so that the wire sheaths do not come into contact with the Switch. If this is unavoidable, use wires that can withstand temperatures of 100°C min. After wiring to the Switch has been completed, ensure an appropriate insulation distance.
The polarity of the LED is indicated on the back of the Switch. Wire the LED correctly according to the polarity.
The built-in LED does not have a limiting resistor. Connect a limiting resistor.
Make sure that the limiting resistor satisfies the characteristics of the built-in LED. The forward current of the built-in LED must be 8 mA minimum.
The resistance can be calculated by using the following expression.
●Calculation Example for Limiting Resistance
Ensure that dust, metal powder, or oil do not enter the interior of the Switch.
Using a standard load switch for opening and closing a microload circuit may cause wear on the contacts. Use the switch within the operating range. (Refer to the diagram below.) Even when using mi- croload models within the operating range shown below, if inrush current occurs when the contact is opened or closed, it may cause the contact surface to become rough, and so decrease life expec- tancy. Therefore, insert a contact protection circuit where necessary. The minimum applicable load is the N-level reference value. This value indicates the malfunction reference level for the reliability level of 60% (λ 60) (conforming to JIS C5003). The equation, λ 60 = 0.5 x 104/times indicates that the estimated malfunction rate is less than 1/2,000,000 with a reliability level of 60%.