SENTRON 3VA2110-5MN36-0JC0 — Motor Protection MCCB with ETU350M
The Siemens SENTRON 3VA2110-5MN36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, purpose-built for motor protection duty. It carries the ETU350M electronic trip unit, which provides phase-failure detection and adjustable overload and short-circuit protection curves matched to motor starting profiles. Breaking capacity varies with system voltage: 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. That 187 kA figure at 240 V is exceptionally high — it handles fault currents from large transformers or utility feeds without cascading upstream. Thermal derating is modest: the breaker holds 100 A from 40 °C through 50 °C, then drops to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. In a hot panel near the top of a cabinet, you lose only 10 % of capacity at 70 °C — better than many MCCBs that derate harder above 50 °C.
Trip Unit and Auxiliary Functions
The ETU350M release is the electronic overcurrent trip; it supports adjustable settings for motor protection, including thermal memory that prevents immediate re-close after a hot overload trip. Phase failure detection is built in — critical for three-phase motor loads where a lost phase can single-phase and burn the winding. A shunt trip (STL) is integrated as the auxiliary release, allowing remote tripping from a PLC or emergency-stop circuit. Two auxiliary switches (HQ) are fitted for status feedback to the control system — one normally open, one normally closed, or both configurable depending on the wiring. The breaker ships with a voltage-trigger function enabled, and the supplied basic switch is order code 3VA2110-5MN36-0AA0. The integrated auxiliary trip is 3VA9688-0BL32 — a spare part number if you need to replace just the shunt trip module.
Dimensions and Panel Fit
Footprint is 105 mm wide × 181 mm tall × 86 mm deep. That 105 mm width is standard for a 3-pole 100 A frame in the 3VA2 series — it fits the same mounting hole pattern and bus-bar spacing as other SENTRON 3VA2 breakers in this current class. No special adapter plate needed for a panel originally cut for a 100 A frame.
Environmental and Mechanical Ratings
Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Maximum power loss at rated current is 75 W — relevant for thermal budgeting inside a sealed enclosure. Mechanical endurance is 20,000 operations (latching cycles). Rated insulation voltage is 800 V.