The Square D Circuit Breaker EDB34020 is a 3-pole, 20A thermal circuit breaker designed for interior use in commercial and industrial applications. It features thermal overload protection, trip indicator, and operates at a maximum voltage of 480Y/277VAC. With a compact design of 6 inches in height and 3 inches in width, this circuit breaker offers an on/off operation method and is suitable for a variety of electrical connections. The Square D brand ensures quality and reliability in this essential electrical component.