The 20 kA breaking capacity per IEC 60947-2 tells you it can safely interrupt fault currents up to that level at 400 V without upstream damage; under UL 1077 it's rated 5 kA, covering North American panelboard supplemental protection. Temperature derating is baked in: at 40 °C it holds 47.25 A, at 50 °C it's 44.3 A, and at 55 °C it's 42.75 A. The operating range is -40 to 75 °C, so it shrugs off the cold start in an unheated pit or mill building.
Where it goes — deployment context
This MCB is designed for mechanical engineering and general industry — the kind of panel that feeds a crusher conveyor, a flotation cell motor, or a ventilation fan. The quick assembly system means you can clip it in and bus-bar it without wrestling with loose hardware. Sealable, halogen-free, and silicon-free — important for panels where outgassing could foul contacts or where the inspector wants a tamper-proof lock.