SIRIUS S2 power contactor — 3RT1034-1BG44
At 400 V AC, the contactor is rated 18.5 kW for AC-3 duty (squirrel-cage motor starting) and 15 kW for AC-2 duty (slip-ring motor starting) — the AC-3 figure is the one to size against for standard induction motors. At 690 V AC, the AC-3 rating drops to 10 kW, reflecting the higher voltage stress on the switching gap. For DC switching, it handles 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — the DC arc is harder to extinguish, so these are lower than the AC numbers. Maximum operating frequency varies by duty: 1200 ops/h for AC-1 (resistive), 1000 ops/h for AC-3, 750 ops/h for AC-2, and 250 ops/h for AC-4 — the AC-4 limit is the binding constraint for high-cycle jogging applications.
Screw terminals accept solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (0.75 to 25 mm²). Solid or stranded: 2x (0.75 to 16 mm²). Minimum permissible conductor cross-section at 40 °C is 16 mm² — relevant when sizing for continuous full-load current in a warm cabinet.
IP20 on the front (finger-safe), IP00 at the terminals — the terminal area must be inside an enclosure. RoHS compliance date is May 1, 2012. DC operating time is 20 to 30 ms. Pickup factor is 0.8 (80% of rated coil voltage), dropout factor is 1.1 (110% of rated voltage before release).
This is an active-production part, sourced through independent distribution channels.