The Siemens 5SY4316-7CC is a SENTRON 3-pole miniature circuit breaker (MCB) with a C-curve tripping characteristic, rated 10 kA interrupting capacity per EN 60898 at 400 V AC. It's also rated 5 kA per UL 1077 and CSA C22.2 No. 235, so it crosses into North American supplementary protection applications. Single-phase and multi-phase operation both top out at 440 V AC. The 3-pole design switches all three phases together; there's no neutral pole switching.
Height is 90 mm. Mounts in any position, which helps when you're squeezing it into a crowded gland plate. Quick-assembly fastening system means it snaps on and off without tools. Combined terminal at top and bottom — accepts both busbar and wire in the same clamp, saving a terminal block. Sealable, so a panel builder can lock the setting after commissioning.
No second-source drama — the C-curve 3-pole 10 kA footprint is widely stocked across distribution, but the 5SY4316-7CC is the Siemens order code that matches the nameplate.
That -40 °C floor covers cold storage and outdoor enclosures in northern climates. The 75 °C ceiling is the internal panel air temperature, not the conductor rating — derate per the thermal curve above 40 °C. Relative humidity influence is specified: max 95% up to 55 °C, dropping to 55% at 70 °C and 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — fine for machine-mounted panels on pumps or conveyors.