The Siemens 5SL4504-7CC is a SENTRON miniature circuit breaker, 1P+N, C-curve, rated 4 A at 230 V AC with a 10 kA breaking capacity per EN 60898. The 1P+N configuration switches both phase and neutral, with the neutral pole opening after the phase pole and closing before it, so the neutral is never broken under load.
Tightening torque is 2.5 to 3 N·m — a common range for this class, so your existing screwdriver bit and torque driver carry over. The terminals are sealable and touch-protected, which simplifies inspection sign-off.
Energy limiting class 3 means it lets through minimal let-through energy (I²t), which protects downstream wiring and devices. The 4 A rating is sized for small branch circuits: lighting sub-circuits, control transformers, or single-socket outlets. If your load draws more than 4 A continuous, step up to the next rating in the 5SL4 family.