The Siemens SENTRON 5SV4416-0 is a 2-pole residual-current circuit breaker (RCCB) rated for 63 A continuous at 40 °C, with a 100 mA AC-type tripping threshold. That 100 mA sensitivity is the go-to for general socket-outlet circuits and feeder protection where a lower 30 mA threshold would cause nuisance trips on longer cable runs.
Snaps onto DIN rail (REG) and takes up 2 modular-width units (36 mm wide). Depth is 70 mm, so it sits flush with most 12-module enclosures — no surprise when you're packing a sub-distribution board. The IP20 rating is standard for a distribution board interior; only the front face is touch-safe once wired.
Thermal derating and real-world loading
Full 63 A holds from 40 °C up to 60 °C — no derating in that band. At 65 °C it drops to 56.96 A, and at 70 °C to 48.2 A. The 50 Hz operating frequency is fixed; this is not a 60 Hz variant.