SIRIUS 3RT1016-2BW42 — 24 VDC Coil Power Contactor, Size S00
The Siemens SIRIUS 3RT1016-2BW42 is a Size S00 power contactor with a 24 VDC coil, designed for switching motor loads in control panels and industrial machinery. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, fitting into a compact 45 mm wide footprint. Spring-loaded terminals on the main current circuit accept 2x (0.25 to 2.5 mm²) solid or stranded conductors, reducing wiring time compared to screw-clamp variants. The IP20 finger-safe enclosure protects personnel during panel access.
Switching Capacity and Motor Duty
The 24 VDC coil draws 3.3 W for both closing and holding, a constant-power design that simplifies DC supply sizing. Switching capacity varies by voltage: at 24 V it handles 10 A, at 60 V it handles 2 A, at 110 V it handles 1 A, and at 220 V it handles 0.3 A — these are the DC-12/DC-13 style ratings for resistive and inductive DC loads. For AC motor duty, the contactor is rated at 4.5 kW at 400 V and 5.5 kW at 690 V in AC-3 utilization category (standard squirrel-cage motor starting). In AC-2 duty (slip-ring motors) at 400 V it's rated 4 kW. For AC-4 duty (plugging/inching) at 400 V it carries 8.5 A. The AC-12 maximum operating current is 10 A for resistive loads. Short-circuit protection coordination: with Type 2 coordination (no damage to contactor), use a gL/gG fuse rated 20 A. With Type 1 coordination (contactor may need replacement), use a 35 A gL/gG fuse. These values guide the upstream protection device selection.
Mounting and Environmental Limits
The 45 mm wide, 60 mm tall, 73 mm deep S00 frame allows side-by-side mounting without derating. Operating temperature range is -25 to +60 °C. Maximum operating altitude is 2 000 m. Pollution degree 3 (conductive pollution or dry non-conductive that becomes conductive) suits industrial environments. The 6 mm clearance at the side maintains creepage distances. Mechanical endurance is rated at 30 million operating cycles typical, reflecting the S00 frame's long-life design for high-cycling applications like conveyor systems or packaging lines.
Sourcing and Availability
As an active-production part, the 3RT1016-2BW42 is sourced through independent distribution channels. Pricing and current availability are confirmed at quote time against an RFQ. The part carries the Siemens SIRIUS brand and is referenced as Q per DIN EN 81346-2.