Siemens 5SV1316-3KK16 is a SENTRON RCBO in super resistant K design, B-curve, 1P+N, 18 mm wide, 1 MW.
At 40 °C it derates to 15.2 A, at 50 °C to 14.4 A, and at 70 °C to 12.8 A. That's a 20 % drop from the nominal at the top of the operating range.
At 18 mm wide (1 MW) and 77 mm deep, it occupies a single modular slot on a standard DIN rail. IP20 rated with conductors connected — that's the usual protection for inside a distribution board; no special sealing required.
