What this MCCB does on the line
The Siemens SENTRON 3VA2216-5MN32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for motor protection, carrying 160 A continuously from 40 °C up to 70 °C without derating — so it holds its full rating even in a warm panel, which is rare for a frame this size. Its interrupting capacity hits 187 kA at 240 V and still delivers 121 kA at 415 V, meaning it can clear a high-fault bolted short on a 400 V distribution bus without upstream fuses needing to open first — selectivity headroom for the engineer coordinating the panel. The built-in shunt trip (STL) release lets a remote PLC or E-stop pushbutton drop the breaker instantly, and the phase-failure detection trips on a lost phase before the motor single-phases and cooks the winding.
Maximum power loss is 19.7 W, so ventilation around the breaker in a sealed enclosure is advisable but not critical for most 160 A motor circuits.