General-purpose Basic Switch A CSM A DS E 3 4 High-capacity Switch Capable of Handling 20 A Loads with Large Inrush Currents Same shape as OMRON Z Basic Switches except in pin plunger position, yet endures inrush currents as large as 75 A. Be sure to read Safety Precautions on page 6 and Safety Precautions for All Basic Switches. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Model Number Structure Ordering Information Model Number Legend Terminal Solder terminal Screw terminal (-B) Actuator Model Model A - 20 G - (1) (2) (3) (4) Pin plunger A-20G A-20G-B (1) Ratings Short spring plunger A-20GD A-20GD-B 20 : 20 A (250 VAC) (2) Contact Gap Panel mount plunger A-20GQ A-20GQ-B G: 0.5 m (3) Actuator Panel mount roller plunger A-20GQ22 A-20GQ22-B None : Pin plunger D : Short spring plunger Panel mount cross roller plunger --- A-20GQ21-B Q : Panel mount plunger Q21 : Panel mount cross roller plunger Short hinge lever A-20GV21 A-20GV21-B Q22 : Panel mount roller plunger V : Hinge lever V2 : Hinge roller lever Hinge lever A-20GV A-20GV-B V21 : Short hinge lever V22 : Short hinge roller lever Short hinge roller lever A-20GV22 A-20GV22-B (4) Terminals None : Solder terminal Hinge roller lever A-20GV2 A-20GV2-B B : Screw terminal (with toothed washer) Specifications Ratings Certified Standard Ratings Ask your OMRON representative for information on certified models. Non-inductive load (A) Inductive load (A) Rated UL/CSA (General ratings only) Resistive Inductive voltage Lamp load Motor load load load (V) Rated voltage Model A-20G NC NO NC NO NC NO NC NO 125 VAC 1 HP 10 A 125 VAC 20 7.5 20 12.5 250 VAC 2 HP 250 VAC 20 7.5 20 8.3 480 VAC 20 A 500 VAC 15 4 10 2 125 VDC 0.5 A 20 3 1.5 20 12.5 8 VDC 250 VDC 0.25 A 14 VDC 20 3 1.5 15 12.5 30 VDC 6 3 1.5 5 5 125 VDC 0.5 0.5 0.5 0.05 0.05 250 VDC 0.25 0.25 0.25 0.03 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: 202C (2) Ambient humidity: 655%RH (3) Operating frequency: 20 operations/min 1A Characteristics Engineering Data Mechanical Durability (A-20G) Operating speed 0.01 mm to 1m/s *1 1,000 Mechanical 240 operations/min Operating Ambient temperature: 202C 700 frequency Ambient humidity: 655%RH Electrical 20 operations/min Without load 500 Insulation resistance 100 M min. (at 500 VDC) Operating frequency: 240 operations/min Contact resistance 15 m max. (initial value) 300 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 Dielectric strength 100 current-carrying metal parts and the ground, 70 and between each terminal and non-current- carrying metal parts 50 Vibration Malfunction 10 to 55 Hz, 1.5-mm double amplitude *2 30 resistance 2 Destruction 1,000 m/s max. Shock re- 2 sistance Malfunction 300 m/s max. *1 *2 10 Mechanical 1,000,000 operations min. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Durability Overtravel (mm) Electrical 500,000 operations min. Degree of protection IP00 Electrical Durability (A-20G) Degree of protection Class I against electric shock 1,000 Ambient temperature: 202C 700 Proof tracking index (PTI) 175 Ambient humidity: 655%RH Operating frequency: 500 Ambient operating temperature 25C to 80C (with no icing) 20 operations/min Ambient operating humidity 35% to 85%RH 300 125 VAC, cos = 1 Weight Approx. 22 to 58 g 125 VAC, cos = 0.4 *1. The value is for the pin plunger. (Contact your OMRON representative for 250 VAC, other models.) cos = 1 100 *2. Malfunction: 1 ms max. 70 50 250 VAC, cos = 0.4 Contact Specification Shape Rivet 30 Contacts Material Silver alloy Gap (standard value) 0.5 mm 10 NC 75 A max. 05210 15 205 Inrush current NO 75 A max. Switching current (A) Structure Contact Form (SPDT) COM NC NO Dimensions (Unit: mm) Terminals Mounting Holes Screw Terminals (-B) 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 Nm. Two, 4.2 dia. mounting 9.2 holes or M4 20 20 17.450.2 25.40.1 COM NO NC The Switch can be panel mounted, provided that the hexagonal nut of 13 2 Three, M4 5.5 Terminal screws the actuator is tightened to a torque of 2.94 to 4.9 Nm. 49.2 (with toothed washer) Panel Mount Plunger Panel Mount Roller Plunger Solder Terminal (-A) - is not included in the model numbers.) +0.2 +0.2 12.5 dia. 0 12.5 0 dia. + 0.2 5 0 6.4 +0.2 25.40.1 11.9 17.450.2 13 0 3 1 NO COM NC 2 49.2 Note: 1. Appropriate terminal screw tightening torque: 0.78 to 1.18 Nm. 2. Unless otherwise specified, a tolerance of 0.4 mm applies to all dimensions. 2 4 4 Durability (x10 operations) Durability (x10 operations)