The Siemens 3VM1220-3ED42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous current across a 40 °C to 50 °C ambient band — no derating needed until you cross 55 °C, where it steps down to 194 A, then 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. Four poles, line protection version, no ground-fault monitoring or N-conductor protection built in.
This MCCB interrupts 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 11.9 kA at 500 V AC. The 415 V figure is the one most panel builders will anchor to for European 400 V three-phase distribution; the 240 V rating covers North American 240/120 V split-phase or 240 V delta feeds. Maximum rated operational voltage for DC applications is 500 V.
Panel footprint and integration
Maximum power loss is 42 W, so factor that into thermal calculations for sealed cabinets.