The Siemens SENTRON 3VA1220-4GF42-0AD0 is a 4-pole molded case circuit breaker rated for 200 A continuous current at 40 °C — this is the full-load current it can carry indefinitely in a 40 °C enclosure, not a peak or a short-time rating. Breaking capacity is the real differentiator here: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. At 415 V, that 75.6 kA rating covers most industrial distribution panels where the available fault current at the main breaker runs 50–65 kA — this breaker clears without needing a current-limiting upstream device. Three auxiliary switches HQ are integrated — that is three form-C contacts for remote status indication (open/closed/tripped). This is a plain-vanilla line-protection MCCB: it protects the cable, not the motor or the process.
Integration and footprint
Dimensions: 70 mm deep, 140 mm wide, 158 mm high. Panel fill factor: one breaker per 140 mm of DIN rail. The 100% N-conductor protection design means the neutral pole is rated the same as the phase poles — no derating needed for unbalanced loads or harmonics. The thermal derating curve above 55 °C (–) drops from 200 A at 50 °C to 176 A at 70 °C — if the panel ambient runs hot, size the load accordingly.