The Siemens 5SV4616-0KL is a 2-pole SENTRON residual current circuit breaker (RCCB) rated for 63 A at 230/400 V AC, 50 Hz, with a 300 mA AC-type fault current trip and a 10 kA short-circuit current rating. It's an instantaneous (non-delayed) design, meaning it trips within 40 ms on a residual fault — no intentional time delay for selectivity.
Current rating and thermal derating
The 63 A rating holds flat from 40 °C through 60 °C ambient — no derating needed in a typical 50 °C panel. At 65 °C it drops to 56.96 A, and at 70 °C to 48.19 A. For a 63 A continuous load, keep the enclosure ambient below 60 °C or step up to the next frame.
DIN-rail fit and wiring
The unit occupies 2 width units (36 mm) on a DIN rail, with a depth of 70 mm and height of 90 mm. It accepts solid or stranded copper from 0.75 mm² up to 35 mm² — enough for a 63 A feed on a 10 mm² or 16 mm² conductor. Mounting position is unrestricted, and the supply can enter from top or bottom.