The Siemens 5SU1324-7FA16 is a 2-pole RCBO from the SENTRON family — a combined residual-current and overcurrent protective device that fits a standard 3-module-width DIN-rail slot in a distribution board.
Temperature derating and mounting
At 40 °C it derates to 15.2 A, at 50 °C to 14.4 A, and at 70 °C to 12.32 A — so in a hot panel or near a kiln control cabinet, size the upstream protection accordingly. Mounting position is any, and supply can enter from top or bottom, which simplifies wiring in tight enclosures. Depth is 77 mm, width 54 mm (3 MW), height 90 mm, with an installation depth of 70 mm — fits standard distribution boards without crowding.