The Siemens 5SM1316-6 is a SENTRON 5SM1-series 2-pole RCCB rated 63 A with a 30 mA Type A residual-current trip, 230 V AC, instantaneous response. This is the core spec that determines fit for a final-sub circuit — the 63 A frame handles the load side, the 30 mA sensitivity catches both sinusoidal and pulsating DC fault currents (Type A), which covers most modern electronics and variable-speed drives downstream. Mounts on DIN rail (REG), occupies 2 width units, installs in any position, and needs 55 mm of enclosure depth. The IP20 rating applies once the distribution board is closed with conductors connected.
Thermal derating and conductor sizing
Above that, the curve steps down: 60.48 A at 50 °C, 57.96 A at 55 °C, 55.44 A at 60 °C, 52.92 A at 65 °C, and 50.4 A at 70 °C. Terminals accept 1.5 mm² minimum to 25 mm² maximum conductor. That 25 mm² top end matches the 63 A rating comfortably.
Integration notes
Supply can land top or bottom — no mandatory orientation. The instantaneous design (no short-time delay) means it trips on the first half-cycle of a residual fault, which is the standard for personnel protection (30 mA). The 1 kA surge-current withstand rating covers inrush from downstream capacitive loads or surge arrestors without nuisance tripping. Mechanical endurance is 10,000 switching cycles typical. Silicon-free construction matters for automotive or electronics manufacturing environments where silicone outgassing can contaminate sensitive surfaces or bonding processes. Finger-and-back-of-hand shock protection means the terminals are shrouded against accidental contact during commissioning.