What this MCCB does for a motor branch
The 200 A frame carries a TM120M thermal-magnetic trip unit that handles motor inrush without nuisance tripping, while the interrupting ratings tell you where it can clear a fault: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 4.5 kA at 690 V. The breaker includes an integrated undervoltage release (UVR), so if control power drops, the MCCB trips — useful for coordinated safety shutdowns on conveyors or kiln drives where loss of control voltage should kill the main power.
Thermal derating — what 200 A means at 70 °C
The 200 A rating holds at 40, 45, and 50 °C ambient. At 55 °C it's 194 A, at 60 °C it's 188 A, at 65 °C it's 182 A, and at 70 °C it's 176 A.
Panel fit and power loss
The design is starter protection, meaning the trip curve is shaped for motor starting duty rather than feeder protection.