What the ratings mean for fit
The Siemens SENTRON 3VA1220-6GE42-0AA0 is a 4-pole molded case circuit breaker rated at 200 A continuous (Iu) with a TM220 thermal-magnetic release. The 200 A rating holds flat from 40 °C to 50 °C, then derates to 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C — so in a warm panel you lose about 12% of capacity at the top end. Breaking capacity runs 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V; that 220 kA figure at 240 V means it handles the full fault current available at a large transformer secondary without needing an upstream current-limiting fuse.
Panel integration and deployment
The 3VA1220-6GE42-0AA0 measures 70 mm deep, 140 mm wide, and 158 mm high — it fits standard MCCB panel cutouts and mounts via the SENTRON base plate or DIN-rail adapter. Front IP40 protection handles typical panel environments; keep it inside a rated enclosure for washdown areas. The TM220 release is field-adjustable for thermal and magnetic pickup, and the optional motor drive (listed as available) enables remote tripping or reset in automated lines.