Part Identity & Mounting
The Siemens SIRIUS 3RT2016-1BB42-1AA0 is a Size S00 power contactor with a 24 VDC coil, designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715.
For higher DC voltages, the rating drops to 2 A at 48 V and 60 V, and 1 A at 110 V — a typical derating curve for DC switching where arc extinction is harder. Switching frequency is duty-dependent: 1,000 cycles/hour for AC-1 resistive loads, 750 cycles/hour for AC-2 and AC-3 motor loads, and 250 cycles/hour for AC-4 plugging/inching duty. The AC-3e rating also sits at 750 cycles/hour. This tells the panel builder that high-inertia or frequent jogging applications need the AC-4 derating. Mechanical service life is 30,000,000 cycles typical, with main contact electrical life specified at 20 to 12 cycles depending on load. The 30-million figure means the actuator mechanism outlasts most panel designs; the electrical life is what governs replacement intervals in heavy cycling.
Environmental & Integration
The 60 °C ceiling is common for panel interiors near drives or transformers — verify ambient inside the enclosure stays below that. Wire cross-section accepts solid or stranded conductors from 0.5 to 4 mm², with dual-wire capacity for 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm². The screw terminals are standard for panel wiring — no special tooling needed beyond a screwdriver.