Motor protection MCCB with ETU350M trip unit
Breaking capacity is rated at 330 kA at 240 V AC, 242 kA at 415 V AC and 440 V AC, 187 kA at 500 V AC, and 52.5 kA at 690 V AC. The integrated shunt trip release (STL) allows remote tripping from a safety circuit or emergency-stop chain.
Above that, derating applies: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. If the MCCB is mounted in a sealed enclosure or next to heat-generating components, use the 55 °C or 60 °C row as your design limit — the breaker will carry 160 A only if the air around it stays under 50 °C. The 105 mm width is standard for a 3-pole 160 A frame in the 3VA2 series — it occupies three 35 mm DIN module spaces. Depth of 86 mm leaves clearance behind the panel door for wiring and the shunt trip connections.