The Square D Circuit Breaker LHL3630026DC is a 3-Pole 300A 600V thermal circuit breaker suitable for industrial applications. It features a black color and a switch control style, with instantaneous break time and triple pole single throw (3PST) contact configuration. This main breaker from the Square D brand is designed for interior use and offers free shipping for added convenience. Made in the United States, this circuit breaker is ideal for businesses and industrial settings requiring a reliable and efficient electrical solution.