SIRIUS 3RT1016-2BE42 — Size S00 Power Contactor with 24 V DC Coil
The Siemens SIRIUS 3RT1016-2BE42 is a Size S00 power contactor with a 24 V DC coil, rated to switch 10 A at 24 V in AC-12 duty. It is designed for screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 50022, making it a direct fit for standard control panels. The main circuit uses spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded conductors, or 2x (24 to 14 AWG). This eliminates the need for screwdriver torque checks during panel assembly — a time-saver on high-density DIN rails. Rated for motor loads: 4.5 kW at 500 V and 5.5 kW at 690 V (AC-3 duty). For resistive or lightly inductive loads, the AC-1 rating is not separately listed, but the AC-12 maximum operating current of 10 A at 24 V gives a practical ceiling for control-circuit switching.
Duty Ratings and What They Mean for Your Load
The AC-2 rating at 400 V is 4 kW — this covers slip-ring motor starting where the contactor makes and breaks the rotor circuit under load. The AC-4 rating at 400 V is 8.5 A, for plugging or inching duty where the contactor opens at full motor current. If your application involves frequent reversing or jogging, the AC-4 figure governs contact life, not the AC-3 number. DC switching capability is specified per voltage: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These are resistive-load values; inductive DC loads (brake coils, solenoid valves) require a free-wheel diode across the load to prevent contact welding. The coil itself draws 3.3 W closing and 3.3 W holding — a constant-power coil that stays cool in continuous duty. Short-circuit protection coordination is specified: Type 2 coordination requires a gL/gG fuse rated 20 A; Type 1 coordination allows a 35 A gL/gG fuse. Type 2 means the contactor remains usable after a fault (no welding of main contacts), while Type 1 allows contact replacement. For critical process lines, spec the Type 2 fuse.
Panel Integration and Environmental Limits
At 45 mm wide, 60 mm tall, and 73 mm deep, the 3RT1016-2BE42 occupies a single 45 mm DIN-rail module. Side-by-side mounting is permitted without derating, so you can pack multiple contactors across a rail for multi-motor groups. The IP20 front protection means it is safe for finger contact in enclosed panels; the terminal area is also IP20. Operating temperature range is -25 to +60 °C, with a maximum altitude of 2,000 m. Pollution degree 3. Mechanical life is rated at 30,000,000 operations.