The Siemens 3VA1220-4EF42-0CC0 is a SENTRON 4-pole molded case circuit breaker (MCCB) rated for line protection duty. It carries a continuous current of 200 A at 40 °C, with the same rating holding at 45 °C and 50 °C before gradual derating kicks in — 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. That thermal profile means it's comfortable in a warm enclosure without losing much headroom.
Interrupting capacity
Short-circuit breaking capacity is 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. That's a serious interrupting rating — it handles high fault currents at common distribution voltages without cascading upstream. Panel builders should check that the upstream protective device coordinates with these levels; the 415 V figure of 75.6 kA covers most European industrial mains.
Dimensions: 158 mm high, 140 mm wide, 70 mm deep — a standard footprint for a 4-pole MCCB in this class, so it fits existing SENTRON panel layouts and DIN-rail mounting schemes. No communication function, no ground-fault monitoring version, no voltage trigger or trip indicator on this variant. It's a straight line-protection MCCB with undervoltage release, designed for fixed installation in distribution boards.