Siemens SENTRON 3VA2110-0MS36-0AA0 — 100 A MCCB with ETU310M, Motor Protection Duty
The Siemens SENTRON 3VA2110-0MS36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed specifically for motor protection. Its electronic trip unit ETU310M provides adjustable overload and short-circuit protection curves matched to motor starting characteristics — the 440 kA breaking capacity at 415 V AC means it can safely interrupt fault currents up to that level on a 400 V class distribution board without cascading to upstream devices. The 690 V AC rated operating voltage covers 400 V and 480 V systems with headroom for 600 V class installations. Rated uninterrupted current holds at 100 A across the full 40 °C to 70 °C ambient range (–), so no derating calculation is needed for a warm enclosure — the breaker delivers its nameplate rating even at 70 °C. That thermal stability simplifies panel design for motor control centers where internal temperature rise is expected.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — the 105 mm width occupies three 35 mm DIN-rail module spaces, standard for a 3-pole MCCB in a SENTRON distribution board or motor control center. Front IP40 protection means the breaker face is protected against tools and solid objects larger than 1 mm; the enclosure interior remains IP2X typical.
The ETU310M electronic trip unit supports motor protection with adjustable thermal memory and magnetic pickup — this is not a thermal-magnetic breaker for general distribution; it is sized for motor branch circuits where the inrush current profile must not cause nuisance tripping. The 440 kA breaking capacity at 415 V and 187 kA at 690 V place this breaker in the high-interrupting category, suitable for installations with high available fault current, such as large transformer secondaries or industrial substations.