SENTRON 3VA2 MCCB — motor protection with ETU350M
The overcurrent release is an ETU350M electronic unit, which provides adjustable protection curves suitable for motor starting profiles. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 500 V — figures that give substantial SCCR headroom for most industrial distribution panels.
Above that, derating is gradual: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. Maximum power loss is 75 W.
Protection and auxiliary functions
Phase failure detection is integrated, so the breaker will open on loss of one phase, preventing single-phasing damage to three-phase motor loads. No auxiliary contact version is fitted as standard.
Mechanical endurance and environmental range
Rated for 20,000 latching operations. Dimensions are 86 mm depth, 105 mm width, and 181 mm height — the 105 mm width is standard for a 3-pole MCCB in this class, fitting most panel-mounted or DIN-rail adapters.