What this MCCB does on the line
The Siemens SENTRON 3VA1196-4EF36-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 16 A continuous current at 40 °C, with a breaking capacity of 121 kA at 240 V AC.
Breaking capacity — what those numbers mean for your panel
This breaker's interrupting rating changes with system voltage, and that's the number that decides if it clears a fault without welding its contacts shut. At 240 V it handles 121 kA — plenty for most service-entrance or large subfeed applications. At 415 V it's rated 75.6 kA, at 440 V it's 52.5 kA, and at 500 V or 690 V it drops to 11.9 kA.
At 60 °C it derates to 15 A, and stays at 15 A through 70 °C.
The shunt trip and two auxiliary switches are factory-fitted, so you don't lose space adding them later. Power loss is 10.6 W maximum, which matters for thermal budgeting in a sealed enclosure.