What it is and what it does
The Siemens 3RT1016-2AR62 is a SIRIUS power contactor in the compact S00 frame, designed for switching motor loads in control panels. It carries a 4 kW rating at AC-2 duty on 400 V, meaning it handles moderate slip-ring and wound-rotor motors at that power level. For the heavier AC-4 duty (plugging, inching, reversing), it's rated 8.5 A at 400 V — the figure that governs life on reversing or jogging applications. The coil pulls 10 A at 24 VDC, so verify your DC supply can deliver that inrush without droop. Mounting is screw or snap-on onto 35 mm DIN rail per EN 50022, which is standard for panel integration. The spring-loaded terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG) — no screw torque to check, just strip and push. Pollution degree 3 means it's rated for industrial environments with conductive dust or occasional condensation, so no derating needed in a typical panel. Operating temperature range is -25 to +60 °C during operation, with a maximum altitude of 2 000 m. Side-by-side mounting is allowed (6 mm clearance at the side), which saves rail space when ganging multiple contactors.
Sourcing and lifecycle
If you're sourcing against a panel specified with the 3RT1016-2AP02 (which uses a different coil voltage or terminal type), the 3RT1016-2AR62 shares the same S00 frame and mounting footprint, so it drops into the same DIN-rail position. The deciding factor is the coil voltage — this one is 24 VDC; verify your control voltage matches before swapping.
Coordination and protection
For Type 1 coordination (no damage to the contactor after a short circuit, but it may need replacement), the required upstream fuse is gL/gG 35 A. For Type 2 coordination (contactor remains usable after the fault), the fuse drops to gL/gG 20 A. These are the values to hand to the panel builder when sizing the branch circuit protection. Mechanical life is typical at 30 million operations, which is high for the S00 frame — this contactor is built for high-cycle applications like conveyor or packaging lines where the contactor cycles every few seconds.