What it is and what it does
The Siemens 3VA2216-6JP32-0AA0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated 160 A continuous current (Iu) across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its three poles carry a rated insulation voltage of 800 V and a maximum operating voltage of 690 V AC. The ETU550 electronic overcurrent release gives you adjustable N-conductor protection (OFF, 20 % to 160 %) and a communication function for integration into a monitored distribution system.
Breaking capacity — what the numbers mean
At 240 V AC this MCCB interrupts 242 kA — that is the highest short-circuit current it can safely clear without welding contacts or rupturing the case. At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V. For a 160 A frame, those figures place it in the high-interrupting category: it can sit upstream of smaller breakers on a high-fault bus without needing a current-limiting fuse ahead of it. The 4.5 kA at 690 V is the limit for 690 V line-side applications; if your available fault current at 690 V exceeds that, you need a different frame or a series-rated combination.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint for this current class — it occupies three 35 mm DIN module positions if mounted on a DIN rail, or bolts directly onto a mounting plate. The IP40 rating on the front means it is protected against tools and wires larger than 1 mm from entering the face; the rest of the breaker is open to the enclosure, so the panel itself must provide the overall IP rating. Maximum power loss is 19.7 W, which matters for thermal rise inside a sealed enclosure — factor that into your ventilation or de-rating calculation if the panel is densely packed.