The Siemens 3VA2216-5HR32-0AA0 is a 3-pole molded case circuit breaker (MCCB) from the 3VA2 series, rated 160 A continuous across the full ambient range of 40 °C to 70 °C — no derating needed up to that ceiling. The ETU345 electronic trip unit provides LI (long-time and instantaneous) protection with DTVE (earth-fault) capability, per the protection function designation LI DTVE. Switching capacity class M means this breaker handles high fault currents: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 17 kA at 690 V.
Electrical connection on both sides uses a nut keeper kit (supplied), so no loose hardware during assembly. Mechanical service life is 20 000 switching cycles typical, which is standard for a distribution breaker; not intended for frequent motor starting.