A-20G-B Omron, A-20G-B Datasheet - Page 2

• Manufacturer Part Number: A-20G-B
• Description: BASIC SWITCH
• Manufacturer: Omron
• Series: Ar

Specifications of A-20G-B

• Circuit: SPDT
• Switch Function: On-Mom
• Contact Rating @ Voltage: 20A @ 125VAC
• Actuator Type: Round (Pin Plunger)
• Mounting Type: Chassis Mount
• Termination Style: Screw Terminal
• Operating Force: 625gf
• Microswitch Type: Snap Action
• Actuator Style: Pin Plunger
• Operating Force Max: 625gf
• Contact Voltage Ac Nom: 500V
• Contact Voltage Dc Nom: 250V
• Contact Current Max: 20A
• Switch Terminals: Screw
• Contact Form: SPDT
• Contact Rating: 20 Amps at 250 Volts
• Actuator: Plunger, Pin
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: A20GB

Characteristics
*1. The value is for the pin plunger. (Contact your OMRON representative for
*2. Malfunction: 1 ms max.
Contact Specification
Structure
Contact Form (SPDT)
Dimensions
Terminals
Screw Terminals (-B)
Solder Terminal (-A)
Note: 1. Appropriate terminal screw tightening torque: 0.78 to 1.18 N·m.
Operating speed
Operating
frequency
Insulation resistance
Contact resistance
Dielectric strength
Vibration
resistance
Shock re-
sistance
Durability
Degree of protection
Degree of protection
against electric shock
Proof tracking index (PTI) 175
Ambient operating temperature
Ambient operating humidity
Weight
Contacts
Inrush current
other models.)
COM
2. Unless otherwise specified, a tolerance of ±0.4 mm applies to all dimensions.
9.2
6.4
Mechanical
Electrical
Malfunction
Destruction
Malfunction
Mechanical
Electrical
COM
1
Shape
Material
Gap (standard value)
NC
NO
20
49.2
25.4±0.1
NO
1
3
2
3
49.2
COM
NO
NC
("-A" is not included in the model numbers.)
NC
NO
20
0.01 mm to 1m/s
240 operations/min
20 operations/min
100 MΩ min. (at 500 VDC)
15 mΩ max. (initial value)
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
10 to 55 Hz, 1.5-mm double amplitude
1,000 m/s
300 m/s
1,000,000 operations min.
500,000 operations min.
IP00
Class I
− 25°C to 80°C (with no icing)
35% to 85%RH
Approx. 22 to 58 g
NC
11.9
2
2
max.
2
Three, M4 × 5.5
Terminal screws
(with toothed washer)
max.
17.45±0.2
17.45±0.2
*
1
*
*
1
2
Silver alloy
75 A max.
75 A max.
0.5 mm
Rivet
*
2
Engineering Data
Mechanical Durability (A-20G)
Electrical Durability (A-20G)
Mounting Holes
Use M4 mounting screws with plane washers or spring washers to
securely mount the Switch. Tighten the screws to a torque of 1.18 to
1.47 N·m.
The Switch can be panel mounted, provided that the hexagonal nut of
the actuator is tightened to a torque of 2.94 to 4.9 N·m.
1,000
1,000
700
500
300
100
700
500
300
100
70
50
30
10
70
50
30
10
Panel Mount Plunger
0
0
0.1
250 VAC,
cosφ = 1
5
250 VAC, cosφ = 0.4
12.5
0.2
+ 0.2
0
0.3
dia.
10
Ambient temperature: 20 ± 2 ° C
Ambient humidity: 65 ± 5%RH
Operating frequency:
Ambient temperature: 20 ± 2 ° C
Ambient humidity: 65 ± 5%RH
Without load
Operating frequency:
125 VAC, cosφ = 1
0.4
Two, 4.2 dia. mounting
holes or M4
25.4±0.1
15
Switching current (A)
0.5
240 operations/min
20 operations/min
Overtravel (mm)
125 VAC,
cosφ = 0.4
0.6
20
Panel Mount Roller Plunger
0.7
0.8
25
13
+ 0.2
0
12.5
+ 0.2
0
5
+ 0.2
dia.
0
(Unit: mm)
A
2