The Siemens 5SY8213-7 is a 2-pole SENTRON miniature circuit breaker with a C-curve tripping characteristic, rated 13 A at 45 °C and derating to 12.68 A at 50 °C and 12.34 A at 55 °C — so in a warm enclosure you lose about 0.3 A per 5 °C rise above 45 °C, which matters when sizing for continuous loads near the thermal limit. Rated for 440 V AC multi-phase operation and 72 V DC maximum (15 kA DC breaking capacity), this breaker covers both AC motor branch circuits and DC control power supplies, though the DC voltage ceiling limits it to 48 V or 60 V nominal systems rather than 110 V DC buswork.
Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz, so it holds up on machinery with moderate vibration — think conveyor drives or pump skids, not high-impact presses.
Halogen-free and silicon-free construction, sealable for lockout/tagout, and classified per EN 61346-2 and IEC 81346-2 as function F (protective device). Suitability for mechanical engineering and industry is stated on the spec sheet.