The Siemens SENTRON 3VA2216-7MS32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current across the entire ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve simplifies panel design: you don't have to oversize the frame for a hot enclosure. The interrupting ratings are the headline: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. The design is listed as starter protection, meaning the trip unit is configured for motor-starting inrush profiles — the ETU310M can be set to ride through the start transient without nuisance tripping. Maximum power loss is 19.7 W, which matters for thermal management inside a sealed or high-density panel.
That's a 4.13 by 7.13 by 3.39 inch envelope — fits most existing panel cutouts for 160 A frame breakers. The 3-pole design with no undervoltage release and no communication module keeps wiring simple: line and load lugs only, no auxiliary control power needed for the trip unit. The breaker has no trip indicator, no voltage trigger, no phase failure detection, and no ground-fault monitoring — it's a straight overcurrent protection device. If you need ground-fault or phase-loss protection, you add external modules or specify a different variant.