RCBO, 63 A, 30 mA, Type A, C-curve
The Siemens 5SU9336-7CR63 is a 1P+N residual-current circuit breaker with overcurrent protection (RCBO) rated at 63 A with a 30 mA Type A residual-current trip, C-characteristic, and a 6 kA breaking capacity at 230 V AC. The C-curve (63 A rated current) means the magnetic trip fires between 5× and 10× In (315–630 A), sized for motor or lighting circuits with moderate inrush that would nuisance-trip a B-curve but still needs fast short-circuit clearance.
Snap-on DIN-rail mounting for 1P+N modular width; the neutral pole switches internally so no separate neutral bar connection is needed downstream of the device. Rated for 230 V AC phase-to-neutral circuits in final-distribution boards — common in residential and light commercial sub-distribution where combined overcurrent and earth-leakage protection is required in a single module width.