The 5SU9306-1KK40: Snaps onto DIN rail in any mounting position, requiring 70 mm installation depth behind the panel face. The 18 mm width (1 modular unit) means it occupies one slot in a standard consumer unit or distribution board. Supply can enter from top or bottom — no orientation restrictions at installation. Rated IP20 once the distribution board is installed and conductors are connected; that's fine for enclosed panels but not for wet environments.
The C-curve characteristic means it trips at 5–10× rated current — designed for inductive loads like small motors or lighting ballasts where inrush is moderate. The 30 mA residual current sensitivity provides supplementary protection against electric shock for AC sinusoidal fault currents (Type AC). Rated operational voltage is 230/240 V AC at 50/60 Hz. Neutral conductor is not switched by this variant, so the neutral bar stays continuous through the device. Touch protection is built in.