What it is and where it lands
The 3RT5055-6AF36: Coil is 110-127 V AC at 50 or 60 Hz (the 0.8 A inrush at both frequencies tells you the hold-in is solid). That puts it in the common control-voltage band for North American and European panels alike. Motor-side: it's rated 55 kW at 690 V, 60 kW at 230 V, and 105 kW at 400 V. That's a serious chunk of iron — think big conveyors, crushers, or pump sets that pull real current.
Mounting and wiring realities
Fastens with screw fixing and allows side-by-side mounting — you can pack these tight in a row if the heat calcs allow. Mounting position is flexible: vertical surface with ±90° rotation and ±22.5° tilt front-to-back. That helps when the panel layout is already tight. Main circuit terminals are screw-type, accepting up to 95 mm² at 40 °C or 70 mm² at 60 °C. That's substantial wire — plan your lug kit accordingly. Surge suppression is built in with a varistor across the coil — one less thing to add externally. Pollution degree 3 means it's rated for industrial environments with conductive dust or occasional condensation. Out here in the grease, that matters.
Thermal and endurance picture
Operates from -25 to +60 °C ambient; storage range is -55 to +80 °C. If your panel sits near a hot process line or in an unheated shed, those numbers cover it. Mechanical endurance is 10 million operations typical. Switching frequency maxes at 2,000 cycles per hour for both AC and DC control, with AC-1 resistive loads hitting 800/h and AC-3 motor loads at 750/h. AC-4 (plugging/reversing) drops to 130/h — that's the duty cycle limit for inching or jogging.
Compliance and documentation
Insulation voltage rated at 1,000 V; maximum AC-3e operating voltage is 1,000 V. RoHS compliance date is March 1, 2017. The brand provides standard Siemens declarations of conformity and material compliance — ask for the specific certificates with your RFQ.