Top Rated Siemens JXD63M400 – 400A 3 Pole Molded Case Circuit Breaker

Designed for high-capacity industrial applications, the Siemens JXD63M400 is a 3-pole, 400A molded case circuit breaker. It delivers robust long-time and instantaneous (LI) protection for heavy motor loads. This unit-mount breaker integrates into Siemens motor control centers and switchboards. It serves as the 50°C calibrated counterpart to the standard 40°C JXD63B400. Operating with a 35kAIC rating at 480VAC, this JD Frame breaker features an adjustable magnetic setting.