SENTRON 5SY6320-8CC — D-curve MCB for high-inrush industrial loads
Breaking capacity is 6 kA per EN 60898 at 440 V AC multi-phase, with a supplementary 5 kA rating per UL 1077 and CSA C22.2 No.235 for North American panels.
Rated 20 A at 35 °C ambient; derate to 18.8 A at 40 °C, 18.18 A at 45 °C, 17.52 A at 50 °C, and 16.84 A at 55 °C. In a crowded DIN-rail enclosure with multiple breakers ganged, use the 40 °C or 50 °C column for realistic continuous current. Occupies 3 modular width units (54 mm wide) with a 70 mm installation depth behind the panel — standard for a 3-pole MCB in a 63 A frame. Mounting position is unrestricted; the quick-assembly system clips onto the DIN rail without tools.