SIRIUS 3RT1015-1BF42 — S00 Power Contactor, 110 VAC Coil
The Siemens 3RT1015-1BF42 is a SIRIUS power contactor in the S00 frame size, designed for switching motor loads and resistive circuits in industrial control panels. It carries a 110 V rated coil voltage and mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 50022, making it a direct fit for standard panel layouts. Rated for AC-2 duty at 400 V delivering 3 kW and AC-4 at 400 V at 6.5 A, this contactor handles both starting and inching/plugging duty cycles. The contact ratings span from 10 A at 24 V through 6 A at 230 V and 3 A at 400 V, with a 4 kW rating at 690 V — covering common low-voltage motor and heater loads. The coil draws 3.3 W for both closing and holding, a low-hold-power design that reduces heat buildup in a densely populated DIN-rail row. Mechanical endurance is rated at 30,000,000 operating cycles, reflecting the SIRIUS platform's typical service life for high-cycling applications like conveyor or pump control.
Mounting and Terminal Integration
The 45 mm wide, 57.5 mm high, 72 mm deep envelope fits the S00 footprint. Side-by-side mounting is permitted with a 6 mm clearance to adjacent devices, which matters when packing multiple contactors into a single enclosure section. Screw-type terminals on the main current circuit accept solid or stranded conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or max 2x 0.75–4 mm² (AWG equivalents: 2x 20–16, 2x 18–14, 1x 12). The IP20 protection rating on the front and terminals means the contactor is suited for enclosed panel use only — not for washdown or outdoor exposure without a higher-rated enclosure. Operating temperature range of -25 to +60 °C and a maximum operating altitude of 2,000 m define the thermal and environmental envelope. Pollution degree 3 classification indicates it tolerates conductive pollution typical of industrial control rooms.
Short-Circuit Coordination and Protection
For Type 2 coordination (no damage to the contactor after a short circuit), the required upstream fuse is gL/gG 20 A. For Type 1 coordination (contactor may need replacement), a gL/gG 35 A fuse is specified. These values guide the selection of branch-circuit protection when the contactor is part of a motor starter or feeder. The contactor carries no built-in instantaneous contact (0 auxiliary contacts), so any auxiliary signaling or interlocking requires a separate auxiliary contact block added to the S00 frame.