The interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell you it is sized for high-fault industrial distribution, not light commercial.
The 160 A continuous rating holds flat from 40 °C up to 50 °C, then derates stepwise: 156 A at 55 °C, 151 A at 60 °C, 147 A at 65 °C, and 142 A at 70 °C. The interrupting ratings across voltage levels are what decide whether this breaker clears a fault without rupturing: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V.
Panel fit and physical constraints
The 3VA1216-4EF42-0AA0 measures 158 mm high, 140 mm wide, and 70 mm deep — a 4-pole MCCB that fits standard distribution panel footprints.