The Siemens 5SU1356-7KV32 is a combined residual-current device and miniature circuit breaker — an RCBO — in a single 1+N-pole module. It's listed as Type A (sensitive to pulsating DC fault currents up to 6 mA), with a rated residual current IΔN of 30 mA and a short-circuit breaking capacity of 6 kA. The thermal-magnetic trip curve is C, rated 32 A. That means it protects a final subcircuit against both earth faults and overload/short-circuit, all in one DIN-rail unit.
The C-curve (32 A) means the magnetic trip operates at 5 to 10 times rated current, so it's a good fit for circuits with moderate inrush — think small motors, pumps, or groups of fluorescent lighting — without nuisance tripping on start-up.