MCCB selection memo — 160 A motor protection with ETU350M
The Siemens SENTRON 3VA2216-7MN32-0JC0 is a 3-pole molded case circuit breaker rated for 160 A continuous current (Iu). It's configured as a motor-protection device, so the ETU350M electronic trip unit includes phase-failure detection and adjustable overload and short-circuit curves — not just a thermal-magnetic. Rated insulation voltage is 800 V. Breaking capacity hits 330 kA at 240 V, 242 kA at 415/440 V, and still 52.5 kA at 690 V, which covers most industrial distribution and motor branch circuits.
Trip unit and auxiliary hardware
Shunt trip (STL) fitted as the auxiliary release — good for remote emergency-off or automated disconnect sequences. The integrated auxiliary trip module carries order code 3VA9688-0BL32. Two HQ auxiliary switches are included for status feedback to the PLC or panel indication. Max power loss at rated current is 75 W; factor that into cabinet thermal calculations.
Mechanical and environmental fit
Dimensions are 181 mm high × 105 mm wide × 86 mm deep. Mounting is standard for the SENTRON 3VA platform — compatible with existing panel cutouts and busbar systems for that series. Operating temperature range is -25 °C to +70 °C; storage from -40 °C to +80 °C. Latching endurance rated at 20,000 cycles.