The Siemens SENTRON 3VA2116-6KQ46-0AA0 is a 4-pole molded case circuit breaker rated for 160 A continuous current across the full ambient range from 40 °C up to 70 °C — no derating needed until you exceed that temperature band. That means it holds its 160 A rating in a warm enclosure without recalculating the wire size. Breaking capacity is the headline: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. For a 160 A frame, those numbers give you serious fault-current headroom on a 480 V or 400 V distribution board — the 187 kA at 415 V means it handles high available fault currents common in industrial secondary substations without needing a current-limiting fuse upstream. It is designed for line protection (cable and busbar), includes communication capability for remote monitoring or trip indication, and features summation current ground-fault monitoring on L+N conductors.
Maximum power loss is 25.5 W — plan for that heat in a sealed enclosure if you are stacking multiple breakers.