What the ratings mean for fit
The Siemens SIRIUS 3RT5054-1AR36 is a size S6 power contactor rated for 92 kW at 400 V in AC-3e duty — that's the motor-switching current for a 160 A class contactor, sized for a 160 kW 4-pole induction motor on a 400 V line. The 440-480 V 50/60 Hz coil means it pulls in on a standard 480 V control transformer; the 0.8 A holding current at 50/60 Hz keeps the control transformer sized correctly. Screw terminals on the main circuit accept up to 70 mm² at 40 °C, so it lands on a 150-185 mm² motor cable without adapters. The 1 000 V rated insulation voltage (Ui) means it's safe for 690 V line-to-line systems, and the pollution degree 3 rating confirms it's built for industrial enclosures where conductive dust or condensation is present. The varistor surge suppressor across the coil is built-in — no separate RC snubber needed for the control circuit.
Mounting and integration
Mounts via screw fixing on a vertical surface; the contactor can be rotated ±90° or tilted ±22.5° front-to-back, which gives flexibility in a tight panel. Side-by-side mounting is allowed — no derating gap needed for multiple units on a DIN rail. Dimensions: 172 mm high, 120 mm wide, 170 mm deep. That depth is the body only; add clearance for the screw terminals and cable bend radius.
Compliance documentation
RoHS compliance date is 03/01/2017 — the part meets RoHS and REACH substance restrictions. The varistor design meets IEC 60947-4-1 for contactor surge suppression. No UL or CSA listing appears in the spec record; verify with the factory for specific project requirements.