The Omron A3L-220 is a part of the company's A-series line of switches. It is an individual, low-profile, dual-in-line switch that is used for tactile control of circuits. The switch is provided with a variety of actuators to meet different operational needs. It has a small size, making installation easier and more economical than larger devices. It is rated for DC circuits of up to 12V, and provides a life expectancy of 100,000 operations. The switch is designed and rated to be water resistant, making it suitable for use in a variety of environments.