The Schneider Electric LR2K0301 is a 400 ampere Miniature Circuit Breaker designed for applications up to 250V AC. It features a three pole thermal-magnetic construction, which provides short circuit protection, overload protection and ground fault protection. The LR2K0301 is UL 489 listed, UL 1077 listed, CSA-C22.2 no. 2 listed, and has a 5 KAIC interrupting rating. The breaker also includes: an 18 mm wide body, an automatic, snap-action trip mechanism, a mechanical and electrical latching option, and an adjustable fixed thermal element. The breaker also has teleservice LED indicators which indicate the current trip status of the breaker. Lastly, the LR2K0301 is equipped with optional auxiliaries that can be used to set the trip settings and provide auxiliary protection.