Selective RCCB for downstream coordination
The Siemens 5SV3616-8 is a SENTRON selective residual-current circuit breaker (RCCB) rated 63 A at 230/400 V AC, 50/60 Hz, with a 300 mA residual trip threshold and Type A waveform detection. The selective design (time-delayed) allows it to coordinate with downstream 30 mA RCCBs so that only the faulted branch trips, keeping upstream circuits live — critical for process lines where an nuisance trip on a lighting or general-power RCCB would drop a whole panel. Rated short-circuit current withstand is 10 kA, and the let-through current is capped at 7 100 A with an I²t limit of 110 000 A²·s, which gives the upstream breaker a defined energy window for selective coordination. The 2-pole unit occupies 2 modular width units (36 mm) on a DIN rail.
Thermal derating and ambient limits
The 5SV3616-8 carries its full 63 A rating from 40 °C through 60 °C (–). At 65 °C it derates to 56.96 A, and at 70 °C to 48.2 A. Operating ambient range is -25 °C to 45 °C; storage range extends from -40 °C to 75 °C. For a panel builder, this means the breaker can sit next to heat-generating contactors or drives without losing headroom as long as the internal cabinet temperature stays under 60 °C — a common constraint in compact enclosures.
Fab-compatible construction
The 5SV3616-8 is declared silicon-free, meaning no silicone-based compounds that could outgas and deposit on wafer surfaces or optics. For a semiconductor fab facility engineer, this is a material-compatibility checkmark — the RCCB can be installed in sub-fab or chase areas without introducing a contamination vector. IP20 rating applies once the distribution board is installed with connected conductors; the breaker itself is not sealed, so it belongs inside a cabinet, not in a washdown zone.