MCCB for line protection with high interrupting capacity
Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V — figures that give selectivity headroom in a main or feeder position without cascading upstream. That keeps the part simple and reliable for standard distribution panels where you need a known trip curve and don't want configuration risk on the line.
Above that, the thermal element begins to derate: 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. If the panel sits near a heat source or in a non-conditioned enclosure, check the actual ambient against that curve — the breaker will trip earlier than the 63 A label suggests.
Undervoltage release and auxiliary contacts
The auxiliary contact version carries two HQ (high-amp) auxiliary switches, part number 3VA9608-0BB24 for the integrated trip block. No separate trip indicator on the front face.
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mounted panel layouts. Front protection is IP40, so it's fine for dry indoor enclosures but not washdown zones.