Siemens 3VA1112-4EF36-0BH0 SENTRON MCCB, 125 A, 3-pole, 70 m

It's built for line protection — meaning it sits at the feeder or main distribution point, not downstream for motor or branch-circuit duty. The 125 A rating holds flat from 40 °C up to 50 °C, then derates to 112.5 A at 70 °C, so in a warm enclosure you still have headroom. Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. That 121 kA at 240 V covers high-fault utility feeds; the 75.6 kA at 415 V handles most industrial distribution panels without needing a current-limiting fuse upstream. Depth is 70 mm, width 76.2 mm, height 130 mm, so it fits standard SENTRON 3VA panel cutouts.