The Siemens SENTRON 3VA1220-5EF42-0JC0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 200 A continuously at 40 °C with a thermal derating curve that holds 200 A through 50 °C, then steps down to 176 A at 70 °C. That means this breaker handles full-rated current in most ventilated enclosures without forced cooling — the derating only bites above 55 °C, where it drops to 194 A.
Interrupting capacity & coordination
The interrupting ratings climb steeply at lower voltages: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. For a 200 A frame, those numbers give serious headroom for high-fault panels — think industrial services fed by large transformers or paralleled gensets where the available fault current pushes 100 kA.
Auxiliaries & releases
Two HQ aux switches give status feedback (open/closed) to a PLC or indicator lamp, enough for a basic position signal without an extra contact block.
Physical fit & panel integration
Dimensions: 140 mm wide, 158 mm tall, 70 mm deep. No special adapter plate needed for a panel originally laid out for a 3VA1110-5ED36-0AC0 or similar — same rail and busbar spacing.