The Siemens 5SV5346-0MB is a 4-pole RCCB from the SENTRON series, Type AC, rated 63 A with a 30 mA trip sensitivity on a 400 V AC supply at 60 Hz. The 6 kA SCCR is the maximum fault current the device can safely interrupt.
Design constraints
Instantaneous design — no short-time delay, so it will trip on any ground fault exceeding 30 mA without intentional delay. Overvoltage category III means it is rated for fixed-installation use downstream of the main distribution board. The 3.9 W power loss per pole at rated current in hot operating state should be summed across all four poles when calculating enclosure thermal rise.