SENTRON 3VA2 MCCB with ETU350 Trip Unit
The 690 V AC rated operating voltage and 800 V rated insulation voltage confirm suitability for 400 V line-to-line systems with margin for transient overvoltages.
Selectivity and Coordination
The 4-pole construction with adjustable N-conductor protection (OFF or 100% setting) allows the breaker to serve both 3-phase + N systems and full 4-pole isolation where the neutral must be switched. The ETU350 trip unit provides electronic overload and short-circuit protection with adjustable I²t curves — essential for selective coordination with downstream branch breakers. At 40 A continuous the breaker covers feeder and large motor circuits; the 60 A minimum adjustment range and 480 A maximum frame indicate the same physical frame accommodates higher-rated trip units if the load grows.
Installation and Environmental Limits
Dimensions of 86 mm depth × 140 mm width × 181 mm height fit standard SENTRON 3VA2 panel cutouts and busbar systems. Storage limits of -40 °C to 80 °C cover cold warehouses and shipping.
