What you're looking at
This is a Siemens SENTRON 3VA1220-6MH32-0CA0 molded case circuit breaker — 3-pole, 200 A continuous, with a TM120M thermal-magnetic trip unit. The interrupting capacity at 415 V is 154 kA, which puts it in the high-fault tier for industrial distribution panels where the upstream transformer can dump serious energy into a bolted fault. The 200 A rating holds flat from 40 °C up to 50 °C; above that it derates smoothly to 176 A at 70 °C, so in a hot enclosure you still have margin on a 175 A load.
What the interrupting ratings mean on your line
The 154 kA at 415 V is the headline number, but the full curve matters: 220 kA at 240 V, 75.6 kA at 440 V, 30 kA at 500 V, and 4.5 kA at 690 V. That drop at 690 V means this breaker is sized for 400 V-class systems — if your motor control center runs 690 V, you need a different frame. The insulation voltage is rated 800 V, so the internal clearances handle the peak, but the interrupting capability at that voltage is limited. For a standard 400 V distribution board this breaker gives you selectivity headroom down to the sub-feed.
Panel fit and wiring
The breaker measures 105 mm wide, 158 mm high, 70 mm deep — that depth is the body only; add the handle throw and lug clearance. It mounts on a standard DIN rail or direct panel, typical for SENTRON 3VA frames. The undervoltage release (UVR) is built in as a factory-fitted auxiliary release, so if you lose control voltage the breaker trips — no separate shunt trip module to wire. The power loss at full load is 44.5 W, so factor that into enclosure heat rise if you're stacking several breakers in a row.