What the 200 A continuous rating and 187 kA interrupting capacity mean for your panel
The Siemens SENTRON 3VA1220-5EF32-0BC0 is a 3-pole molded case circuit breaker (MCCB) in line protection configuration, carrying a continuous current rating Iu of 200 A at 40 °C through 50 °C with no derating — it holds the full 200 A up to that ambient. Above 50 °C the rating steps down: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C, so a panel builder running the breaker in a warm enclosure needs to account for that thermal curve. The interrupting capacity is the headline number here: 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 — that means this breaker can safely clear a fault up to 187 kA on a 240 V service without upstream cascading, which is the kind of rating you spec for high-fault industrial mains or transformer secondaries where the available fault current is substantial. The TM240 thermal-magnetic release means the thermal element is fixed-trip at 200 A (the breaker's continuous rating) and the magnetic instantaneous pickup is set at 240 A — a narrow band that gives fast short-circuit response while still riding through motor inrush on moderate loads. Undervoltage release is included as standard, so the breaker can be tripped remotely by a control signal or safety circuit.
Panel integration — footprint and auxiliary contacts
It ships with 2 auxiliary switches (HQ type) pre-installed, so you have status feedback (open/closed/tripped) without ordering a separate accessory block.