APL111-1REC4-42-103-AM is a three-pole magnetic circuit breaker designed for reliable, low-cost power switching, circuit protection, and circuit control in industrial and automation applications. The unit features a 400Hz long-delay trip characteristic (code 42) with REC4 quick-connect terminals, enabling rapid installation and maintenance. The breaker operates with a trip-free mechanism that forcibly returns the handle to the OFF position upon overload, ensuring positive circuit isolation. Key technical specifications include mounting dimensions of 2.280 inches (57.91 mm) width for the three-pole configuration, with panel mounting tolerances of ±0.005 inches. The device is suitable for applications requiring delayed response to transient overcurrents, such as motor starting circuits and sensitive automation systems where circuit protection must be coordinated with load characteristics.