Square D Q4 molded case circuit breakers offer thermal magnetic protection and can automatically or manually open a circuit under overload or short-circuit conditions. They're suitable for various applications, including construction and industrial settings, with features like Push-to-Trip allowing safe manual tripping. The breaker has an interrupting rating of 25kA at 240VAC, is a 2-pole unit mount breaker rated for 350A, and meets certifications such as UL 489, CSA, and IEC.