The Square D FAL34040 circuit breaker is a thermal circuit breaker with a maximum amperage of 40A, suitable for interior use in any room. It features a switch control style, overcurrent protection properties, and screw terminal electrical connection. With a protective black color design and a bolt-on mounting style, this main breaker provides instantaneous break time and operates with an on/off method. This product is ideal for industrial applications and offers triple pole single throw contact configuration for reliable performance.