What it is and where it fits
The Siemens 3RT1054-3AR36 is a SIRIUS power contactor in frame size S6, intended for switching motor loads and resistive loads in industrial control panels. It carries a rated control supply voltage of 440 to 480 V and includes an auxiliary switch for feedback or interlocking. Mounting is via screw fixing, with the coil connection using spring-type terminals. The main power circuit accepts stranded conductors from 16 to 70 mm², covering the typical range for a contactor of this frame.
Key ratings and what they mean
Rated for AC-3 switching up to 1000 operations per hour, this contactor handles frequent motor starting without exceeding thermal limits. The AC-4 maximum of 130 operations per hour reflects the more demanding inching or plugging duty, where the contactor must interrupt motor currents at standstill. Mechanical endurance is typical 10,000,000 operations, giving a long service life in high-cycle applications. The arcing time of 10 to 15 ms and closing times of 40 to 60 ms (both AC and DC) are consistent for a contactor of this size and aid in coordination with upstream protection. Auxiliary contact ratings are provided at several voltages: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V. These define the maximum switching capacity for control circuits at those levels.
Integration and environment
The contactor measures 172 mm high, 120 mm wide, and 170 mm deep, fitting a standard panel layout. Mounting position allows vertical surface installation with +/-90° rotation and +/-22.5° tilt front-to-back, giving flexibility in tight enclosures. Clearances required: 10 mm upwards, 10 mm downwards, 20 mm forwards, and 10 mm at the side. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.