Siemens SIRIUS 3RT1016-2BB44-3MA0 — Power Contactor, Size S00, 24 VDC Coil
It carries a 24 V DC coil with a pick-up threshold of 0.85 x Us and a drop-out of 1.1 x Us — meaning the coil reliably pulls in at about 20.4 V and drops out if voltage rises to 26.4 V, a characteristic that matters when sharing a DC supply with other inductive loads. Rated for 5.5 kW at 690 V AC (AC-3 duty) and 4.5 kW at 500 V, this contactor handles typical three-phase induction motors up to those power levels. For DC switching, the auxiliary contacts are rated 10 A at 24 V DC and derate to 0.3 A at 220 V DC — a curve that reflects the arc-extinction challenge at higher DC voltages.
Mounting and Integration — DIN Rail, Spring Terminals, Side Clearance
The 45 mm width and 60 mm height fit the S00 footprint; depth is 114 mm including the spring-loaded terminals. Main circuit connections use spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded wire, or 2x (24 to 14 AWG). The spring-cage design eliminates the need for screw-torque checks during commissioning — strip to 8 mm, insert, and the clamp holds.
Coordination and Protection — Fuse Ratings, Mechanical Endurance
Coil power consumption is 3.3 W DC for both closing and holding — the SIRIUS DC coil design does not reduce holding power after pick-up, so the coil draws continuous 3.3 W whenever energized.