Integrator's note: 3RT2016-1BW42
The Siemens SIRIUS 3RT2016-1BW42 is a size S00 power contactor — the smallest frame in the SIRIUS family, built for switching motor loads up to 3 kW at 400 V AC-3 duty. Coil is 48 VDC, screw-type terminals on both coil and main contacts. Integrated auxiliary switch (1 NO + 1 NC) is wired to the same terminal block, saving a separate aux block on the DIN rail.
Dimensions: 45 mm wide, 58 mm tall, 73 mm deep — fits standard S00 cutout in a 40 mm deep enclosure with clearance for wiring.
For doubled conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm². Strip length follows standard screw-terminal practice — no special tooling required. Main contacts are 3-pole (3 NO), rated for 20 A at 400 V AC-3e.
Rated for 1,000 operations per hour at AC-1 (resistive), 750 ops/h at AC-2 and AC-3 (motor), and 250 ops/h at AC-4 (plugging/inching). Switching times: DC coil pickup 7...13 ms, arcing time 10...15 ms.
