General-purpose Basic Switch

A

High-capacity Switch Capable of Handling 20 A Loads with Large Inrush Currents

Ratings

Rated
 voltage
 (V)

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
 500 VAC

20
 20
 15

7.5
 7.5
 4

20
 20
 10

12.5
 8.3
 2




8 VDC
 14 VDC
 30 VDC
 125 VDC
 250 VDC

20
 20
 6
 0.5
 0.25

3
 3
 3
 0.5
 0.25

1.5
 1.5
 1.5
 0.5
 0.25

20
 15
 5
 0.05
 0.03

12.5
 12.5
 5
 0.05
 0.03















 

Note: 1. The above values are for steady-state current.
            2. Inductive load has a power factor of 0.4 min. (AC) and a time constant of 7 ms max. (DC).
            3. Lamp load has an inrush current of 10 times the steady-state current.
            4. Motor load has an inrush current of 6 times the steady-state current.
            5. The ratings values apply under the following test conditions:
                 (1) Ambient temperature: 20±2°C
                 (2) Ambient humidity: 65±5%RH
                 (3) Operating frequency: 20 operations/min

Certified Standard Ratings

Ask your OMRON representative for information on certified models. 

UL/CSA (General ratings only)

Rated voltage

A-20G

125 VAC

1 HP 10 A "L"

250 VAC

2 HP

480 VAC

20 A

125 VDC

0.5 A

250 VDC

0.25 A

Characteristics

Operating speed

0.01 mm to 1m/s * 1

 

Operating frequency

Mechanical

240 operations/min

 

Electrical

20 operations/min

 

Insulation resistance

100 MΩ min. (at 500 VDC)

 

Contact resistance

15 mΩ max. (initial value)

 

Dielectric strength

1,000 VAC, 50/60 Hz for 1 min between
 terminals of the same polarity
 2,000 VAC, 50/60 Hz for 1 min between the
 current-carrying metal parts and the ground,
 and between each terminal and non-current-
 carrying metal parts



Vibration resistance

Malfunction

10 to 55 Hz, 1.5-mm double amplitude * 2

 

Shock resistance

Destruction

1,000 m/s2 max.

 

Malfunction

300 m/2 max. * 1 * 2

 

Durability

Mechanical

1,000,000 operations min.

 

Electrical

500,000 operations min.

 

Degree of protection

IP00

 

Degree of protection against electric shock

Class I

 

Proof tracking index (PTI)

175

 

Ambient operating temperature

-25 ° C to 80 ° C (with no icing)

 

Ambient operating humidity

35% to 85%RH

 

Weight

Approx. 22 to 58 g

 

1. The value is for the pin plunger. (Contact your OMRON representative for other models.)
 2. Malfunction: 1 ms max. 

Contact Specification

Contacts

Shape

Rivet

Material

Silver alloy

Gap (standard value)

0.5 mm

Inrush current

NC

75 A max.

NO

75 A max.