Siemens SENTRON 3VA2140-5MN32-0HL0 is a 3-pole molded case circuit breaker rated at 40 A continuous current, built for motor protection duty. It carries the ETU350M electronic trip unit with phase failure detection, and a shunt trip release integrated. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, and still holds 17 kA at 690 V — so it handles high-fault panels without cascading upstream. The 40 A rating holds steady from 40 °C up to 50 °C; above that it derates gradually to 36 A at 70 °C.
Motor protection and trip unit
This is the motor protection version, not a plain line breaker. The ETU350M electronic trip unit gives adjustable overload and short-circuit protection curves matched to motor starting inrush — no nuisance tripping on start-up. Phase failure detection is built in, so a lost phase on a 3-phase motor load triggers a trip instead of cooking the winding. Rated insulation voltage is 800 V.
Auxiliary and alarm contacts
Comes with 2 auxiliary switches plus 1 trip alarm switch and 1 electrical alarm switch — all HQ (high-rupture-capacity) type. That's enough for remote status indication, fault annunciation, and a separate alarm for electrical trips. The integrated auxiliary trip module is order code 3VA9688-0BL30.
Physical footprint
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame — bolts into the same panel cutout and bus bar pattern as other 3VA2-frame breakers. No DIN-rail mount; it's bolted directly to the mounting plate or busbar system.
Environmental and power loss
Operates from -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss is 75 W — accounts for the internal heater and trip coil dissipation at full rated current. That matters for enclosure thermal rise calculations in a sealed panel.