SIRIUS 3RT1015-1BG41 — Power Contactor, Size S00, 24 VDC Coil
The Siemens 3RT1015-1BG41 is a SIRIUS power contactor in frame size S00, designed for switching motor loads and resistive circuits in industrial control panels. It carries a 24 VDC coil with a holding power of 3.3 W and a closing power of 3.3 W — a DC magnet that stays latched on steady DC, not a rectified AC coil. Rated operational current hits 10 A at 24 V (AC-12), 6.5 A in AC-4 duty at 400 V (the heavy inching/plugging category), and 3 kW in AC-2 at 400 V for slip-ring motor starting. For DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. That DC curve matters if you are breaking solenoids or DC brake coils — the arc extinction is different from AC. Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022. Width is 45 mm, depth 72 mm, height 57.5 mm — fits the standard S00 footprint. IP20 on the front and at the terminals; pollution degree 3 means it is rated for industrial environments where conductive contamination can occur.
Termination and Wiring
Main current circuit uses screw-type terminals accepting 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), max 2x (0.75…4 mm²) solid or stranded, or 2x (20…16), 2x (18…14), 1x 12 AWG. Side-by-side mounting is permitted — no derating gap required for the basic thermal rating, though the mechanical life of 30 million operations assumes proper mounting and load conditions.
Coordination and Protection
For type of coordination 2 (no welding after short-circuit), the required upstream fuse is gL/gG 20 A. For type of coordination 1 (welding permitted but no fire risk), the fuse is gL/gG 35 A. This is the standard IEC 60947-4-1 coordination — the 20 A fuse keeps the contactor reusable after a fault; the 35 A fuse clears the fault but the contactor may need replacement.