The Siemens 5SY4601-7CV is a 3-pole-plus-neutral miniature circuit breaker rated for a 15 kA breaking capacity (Icu) at 400 V AC, with a C1 tripping characteristic. The 3P+N configuration means it switches all three phases and switches the neutral, but does not protect the neutral — the neutral pole is switched only, not monitored for overcurrent.
With a 1 A rating (C1), this breaker is sized for control circuits, signal transformers, or small auxiliary loads — not for power distribution.
The 3P+N width is 4 module spaces (72 mm at 18 mm per pole). Busbar stabs on the line side accept the standard Siemens pin-and-fork busbar system for group feeding. The neutral terminal is marked and located on the right side of the assembly — verify the busbar orientation if using a pre-wired distribution block.