Line protection MCCB with ETU850 — 160 A, 3-pole
The Siemens SENTRON 3VA2116-5KP32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current at 40 °C, with an ETU850 electronic trip unit. The ETU850 is an electronic trip unit with communication capability — the breaker carries a Communication Function flag, which means it can interface with a higher-level energy management or SCADA system via the SENTRON communication modules (not included in this base order code).
Thermal derating and enclosure fit
At 55 °C it drops to 154 A, at 60 °C to 148 A, and at 70 °C to 136 A. The maximum power loss is 25.5 W, which is moderate for a 160 A frame; ensure the enclosure's thermal dissipation can handle that plus adjacent devices.
Selectivity and coordination notes
The interrupting ratings across voltage levels are: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. The steep drop at 690 V means this breaker is not intended for 690 V line-side applications with high available fault current — verify the point-of-installation SCCR against the 4.25 kA limit if used on a 690 V system.