The Siemens 5SL4404-6CC is a 4-pole miniature circuit breaker (MCB) rated 400 V with a 10 kA breaking capacity, B-curve trip characteristic, and 4 A rated current.
Four poles occupy 4 module widths (about 72 mm). The B-curve and 4 A rating suit lighting circuits, small control transformers, and resistive heater loads where the inrush stays under 20 A. For motor circuits or high-inrush loads, a C-curve MCB would be the correct choice.
