The Siemens 5SU1324-7KX32 is a 2-pole RCBO from the SENTRON family — a combined overcurrent and residual-current device in one modular unit, rated 32 A at 30 °C with a 30 mA Type A residual-current trip and C characteristic. Type A residual detection covers pulsating DC fault currents from electronics and rectifier loads, which the older AC-only types miss. Derating matters here: the 32 A rating holds at 30 °C, but drops to 30.4 A at 40 °C and to 24.64 A at 70 °C.
Depth is 77 mm, installation depth 70 mm — verify your enclosure depth clears the wiring space behind the unit. Mounting position is any, so vertical or horizontal rail orientation works. Supply can enter from top or bottom, which simplifies busbar routing in a crowded board.
Compliance and approvals
Rated per EN 60898 for breaking capacity, overvoltage category III, pollution degree 2. Energy limitation class 3 means the let-through energy is low enough to protect downstream equipment in a fault.