The Siemens 5SU1654-7RC10 is a 2-pole RCBO (Residual Current Breaker with Overcurrent) rated 10 A with C characteristic, Type A sensitivity at 300 mA, packed into a 2-module width. The 300 mA sensitivity is a fire-protection threshold, not a personnel-protection one (that would be 30 mA or lower); it's typically specified for distribution sub-mains, lighting circuits, or equipment where nuisance tripping on leakage from filters and drives must be balanced against ground-fault detection.
Integration into a panel
The 2-module width (about 36 mm on a standard DIN rail) fits a standard distribution board or sub-distribution enclosure. Spring-cage or screw terminals accept 1.5 to 25 mm² conductors depending on the terminal design — verify the maximum conductor size on the unit's label before terminating paralleled feeds.