MCCB with shunt trip for line protection
This breaker delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Those numbers govern selectivity coordination downstream — at 415 V common in industrial panels, 75.6 kA gives headroom for most transformer-fed fault currents without cascading upstream.
Thermal derating — what the 100 A rating actually means
Above that, it steps down: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C.
The 4-pole width (101.6 mm) is standard for this frame size — it occupies four 25.4 mm module spaces on a DIN rail, matching the SENTRON 3VA family footprint.