The Siemens SENTRON 3VA1220-5GF42-0AE0 is a 4-pole molded case circuit breaker (MCCB) rated for a continuous current of 200 A at 40 °C, with a TM240 thermal-magnetic release for line protection. It carries a breaking capacity of 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V — so at 415 V it can safely interrupt a fault current over 120 kA without upstream damage.
At 55 °C it derates to 194 A, at 60 °C to 188 A, at 65 °C to 182 A, and at 70 °C to 176 A.
Physical fit and auxiliary contacts
It ships with four HQ auxiliary switches built in — no separate add-on module needed for status feedback. The N-conductor protection is set to 100% of phase rating, which matters for panels feeding nonlinear loads where the neutral carries full phase current.
