SIRIUS 3RT1046-3AM20 — Power Contactor, Size S3, 55 kW at 500 V
The Siemens 3RT1046-3AM20 is a SIRIUS power contactor in size S3, rated for motor switching at 55 kW at 500 V AC-3 and 25.4 kW at 690 V AC-3. Per the datasheet, it achieves 850 operating cycles per hour at AC-3, which supports high-duty-cycle conveyor or pump applications without exceeding thermal limits. The IP20 rating on the front with cover or box terminal means the front face is finger-safe for panel access; the terminal area itself is IP00, so live parts are exposed during wiring and the panel door must interlock or require a tool to open.
Wiring and Terminal Specifications
Main current circuit connections use screw-type terminals. The terminal accepts solid conductors of 2x (0.25 to 2.5 mm²) and stranded conductors of 2x (10 to 50 mm²), with an intermediate range of 2x (2.5 to 16 mm²) for either solid or stranded. This covers control wiring through to motor power cables up to 50 mm² stranded.
Dimensions are 146 mm height, 70 mm width, and 139 mm depth — the 139 mm depth is the front-to-back panel space required, including the contactor body and any box terminal cover.