Siemens 5SL6310-7YA — 3-pole C-curve MCB, 10 A, 6 kA
The Siemens 5SL6310-7YA is a SENTRON miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 10 A at 400 V AC, 3-pole, and a breaking capacity of 6 kA per EN 60898. Rated 10 A at 30 °C ambient, it derates to 9 A at 45 °C and to 0.93 A at 40 °C — that last figure looks like a data-entry anomaly (likely 9.3 A or a different condition), so for panel design use the 30 °C rating and apply the standard IEC 60898 derating curve above 30 °C.
Snap-on DIN rail mount, any position. Installation depth 70 mm behind the panel face; overall depth 76 mm including the actuator. Width 54 mm (3 MW). Sealable with a lead seal through the housing — useful for utility-metering or tamper-proof distribution boards. IP20 with the distribution board cover fitted — not rated for open-panel or wet-area use. Pollution degree 2 (non-conductive dust, occasional condensation). Overvoltage category III (fixed installation, downstream of the main service entrance).
Mechanical life rated at 10 000 switching cycles typical.
DC rating and limitations
Rated for DC operation up to 72 V maximum. AC only on the supply voltage (400 V AC rated, 400 V AC maximum multi-phase).