MCCB for motor branch circuits
Its ETU310M electronic trip unit is configured for motor-starting duty, where high inrush currents must pass without nuisance tripping while still providing short-circuit protection.
The 63 A rating holds steady from 40 °C up to 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C — so in a warm enclosure you size the breaker for the actual ambient, not the nameplate. The 800 V rated insulation voltage (Ui) means this MCCB can be used on 480 V, 600 V, and even 690 V systems (where interrupting drops to 52.5 kA). The 20 000 mechanical endurance cycles reflect a robust mechanism for frequent switching in motor starter duty.
Dimensions are 181 mm high by 105 mm wide by 86 mm deep — this is a standard SENTRON 3VA2 frame size, so it fits the same panel cutouts and bus-bar spacing as other 3VA2 breakers. The auxiliary contact version ships with 2 HQ (high-availability) switches pre-installed, saving a slot in the accessory compartment.