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A3S

Lighted Pushbutton Switch (Square)

A3S

Pushbutton Switch Series with Square 40-mm Body

Item list of A3S

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last update: April 1, 2020

Approved Standard Ratings

UL (File No. E41515), CSA (File No. LR45258)

Standard Load: 3 A at 125 VAC
                        2 A at 250 VAC
Microload: 0.1 A at 125 VAC
                0.1 A at 30 VDC
Note: Certification has been obtained for the Switch Unit.
          For detailed information on individual products that have received certification, consult your supplier.

Ratings

For Standard Loads

Rated voltage Non-inductive load (A) Inductive load (A)
Resistive load Lamp load Inductive load Motor load
NC NO NC NO NC NO NC NO
125 VAC
250 VAC		 3
2		 1
0.7		 0.7
0.5		 2
1.5		 1.5
1		 1
0.7
8 VDC
14 VDC
30 VDC
125 VDC
250 VDC		 3
3
2
0.4
0.2		 1
1
1
0.05
0.03		 2
1.5
1.5
0.4
0.2		 1.5
1.5
1
0.05
0.03

Note: 1. The above values are for steady-state currents.
         2. Inductive load: Power factor = 0.4; time constant = 7 ms.
         3. The lamp load has an inrush current of 10 times the steady-state current.
         4. The motor load has an inrush current of 6 times the steady-state current.
The rated values are for testing conducted under the following conditions.
(1) Ambient temperature: 20±2°C
(2) Ambient humidity: 65% ±5%RH
(3) Operating frequency: 20 times/min

For Microloads

Rating 0.1 A at 30 VDC (resistive load); 0.1 A at 125 VAC (resistive load)
Minimum applicable load 1 mA at 5 VDC

LED Lamp

Type Applied voltage Rated voltage Rated current Built-in limiting resistance
DC only 5 VDC ± 5% 5 VDC 30 mA 39 Ω
12 VDC ± 5% 12 VDC 15 mA 270 Ω
24 VDC ± 5% 24 VDC 12.5 mA 1300 Ω

Characteristics

Operating frequency Mechanical Momentary operation models: 120 operations/min max. *1
Electrical 20 operations/min max.
Insulation resistance 100 MΩ min. (at 500 VDC)
Contact resistance Standard load 50 mΩ max. (initial value)
Microload 50 mΩ max. (initial value)
Dielectric strength Between terminals of same polarity 1,000 VAC, 50/60 Hz for 1 minute
Between terminals of different polarity 2,000 VAC, 50/60 Hz for 1 minute
Between current-carrying metal part
and ground		 2,000 VAC, 50/60 Hz for 1 minute
Between each terminal and non-
current-carrying metal part		 2,000 VAC, 50/60 Hz for 1 minute
Between lamp terminals 1,000 VAC, 50/60 Hz for 1 minute *2
Vibration resistance Malfunction 10 to 55 Hz, 1.5-mm double amplitude *3
Shock resistance Destruction 500 m/s2 max.
Malfunction 200 m/s2 max. *3
Life expectancy Mechanical Momentary operation models: 1,000,000 operations min.
Alternate operation models: 100,000 operations min.
(One operation consists of set and reset operations.)
Electrical 100,000 operations min. (rated load)
Weight Approx. 10 g
Inrush current NC Standard load: 10 A max.
NO Standard load: 10 A max.
Ambient operating temperature - 10 to 50 °C (with no icing or condensation)
Ambient operating humidity 35% to 85% RH
Ambient storage temperature - 25 to 65 °C (with no icing or condensation)
Degree of protection IP00
Electric shock protection class Class II
PTI (proof tracking index) 175
Pollution degree 3 (IEC 60947-5-1)

*1. With alternate operation models, 60 operations/min max. One operation cycle consists of set and reset operations.
*2. With no LED lamp mounted.
*3. Malfunction : 1 ms max.

Operating Characteristics

Operation Momentary operation models Alternate operation models
Operating characteristics
Operating force OF max. 3.92 N 4.90 N
Releasing force RF min. 0.49 N 0.294 N
Total travel TT Approx. 3 mm Approx. 3 mm
Pretravel PT max. 2.2 mm 2.2 mm
Lock travel alternate LTA min. - 0.5 mm

Contact Form

Name Contact Form
Double-throw contacts
1126_sp_7_1

last update: April 1, 2020

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