Siemens SENTRON 3VA2216-5MN32-0AH0 — 160 A MCCB with ETU350M
The Siemens SENTRON 3VA2216-5MN32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for motor protection duty, carrying a continuous current Iu of 160 A and an insulation voltage Ui of 800 V. The interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — figures that define the available fault current it can safely clear at each system voltage without upstream coordination changes. The electronic trip unit is an ETU350M, which provides adjustable overload and short-circuit protection curves plus phase failure detection. The breaker includes a trip indicator, two auxiliary switches, and one trip alarm switch (HQ type), giving the panel builder discrete status feedback for PLC or annunciator inputs.
Thermal derating and panel integration
Rated continuous current holds at 160 A from 40 °C through 50 °C ambient; above that it derates to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. The maximum power loss at rated load is 75 W, which should be considered in enclosure thermal calculations. The front face carries IP40 protection — suitable for enclosed panel mounting where the breaker is not exposed to washdown or dust ingress. Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA2 footprint that fits existing Siemens switchboard and distribution panel cutouts. The latching endurance is rated at 20 000 cycles, which covers frequent switching in motor-starting or process-interlock applications.