The Siemens SENTRON 5SM3347-6KK12 is a 4-pole RCCB rated 80 A at 400 V AC, 50 Hz, Type A, 10 kA SCCR. It is a current-production part.
Type A detection means it trips on sinusoidal AC residual currents and also on pulsed DC residual currents up to 1 kHz — common for variable-speed drives, UPS systems, and LED drivers that generate smooth DC fault currents. A standard Type AC RCCB would not catch those. That is the standard SCCR for most distribution boards in industrial and commercial 400 V networks. Conductor range accepts solid or stranded from 1.5 mm² up to 25 mm². Terminals are finger and back-of-hand safe.
Mounting position is unrestricted. Supply connects at the bottom; installation depth is 70 mm.