The Siemens 5SL4404-7CC is a 4-pole miniature circuit breaker rated 400 V with a 10 kA interrupting capacity, C-curve trip characteristic, and 4 A rated current.
At 4 A per pole, it protects a 4 A branch circuit — sized for a single small motor, a control transformer primary, or a lighting subfeed.
Snap-on DIN rail mount, 4-pole width (72 mm at 18 mm per pole). Busbar compatible via the SENTRON comb busbar system. The C-curve means it tolerates the inrush of a 4 A motor or transformer without nuisance tripping — verify the load's starting current against the curve if the application is near the threshold.