The Crouse-Hinds MJ-1359 Type MP-A circuit breaker is a 3-pole, 100 amp main breaker designed for AC current applications. It features overload protection and an instantaneous break time, making it suitable for various electrical setups. With a control style of a switch and a maximum amperage of 100 A, this black-colored circuit breaker is manufactured in the United States by Crouse-Hinds. This reliable and high-quality product provides efficient and safe circuit protection for industrial and commercial settings.