The Siemens 3VA2116-7JQ42-0AA0 is a 4-pole SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous at 40 °C, with an ETU560 electronic trip unit. It's a line-protection breaker meant for distribution panels where you need selective coordination downstream — the 330 kA interrupting capacity at 240 V AC gives you headroom for high-fault service entrances or transformer secondaries, and it still holds 242 kA at 415 V and 440 V, dropping to 3.7 kA at 690 V.
The ETU560 is a communicating electronic trip unit, so this breaker talks to your building management or SCADA system for load monitoring and trip-event capture. The N-conductor protection is adjustable from OFF to 20 % to 100 % of the phase rating, which matters if you're feeding a nonlinear load with high triplen harmonics on the neutral.