The Siemens 3VA1220-4EF32-0AE0 is a SENTRON molded case circuit breaker (MCCB) built for line protection — 3-pole, 200 A continuous at 40 °C, with a TM240 thermal-magnetic trip unit. That 200 A holds steady up to 50 °C; above that it derates to 194 A at 55 °C and 176 A at 70 °C, so if your panel runs hot, you size on the derated number, not the nameplate. Breaking capacity is 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — enough headroom for most industrial service-entrance or feeder applications where high fault current is a concern.
Sizing and selectivity notes
Power loss maxes at 42 W. No ground-fault monitoring version is included on this variant — that's a separate order code if you need GF protection.
Physical fit in the enclosure
That covers unheated warehouses and outdoor cabinets in most climates.