Siemens SIRIUS 3RT5054-1AV36 — S6 Power Contactor for Motor Loads
The Siemens SIRIUS 3RT5054-1AV36 is an S6-frame power contactor rated for AC-3e motor switching at 115 A up to 690 V, making it suitable for controlling medium-to-large induction motors in industrial panels. The 380-420 V 50/60 Hz coil draws 6 A at 230 V and 3 A at 400 V, with built-in varistor surge suppression across the coil terminals. Screw-type main terminals accept up to 70 mm² at 40 °C or 50 mm² at 60 °C, and the contactor mounts on a vertical surface with ±90° rotation and ±22.5° tilt flexibility.
AC-3e Motor Switching at 690 V — 115 A Continuous
The headline rating of 115 A at AC-3e (690 V) defines the contactor's ability to switch three-phase induction motors under full-load starting and running conditions. This is the rating that governs motor sizing: a 115 A AC-3e contactor handles motors drawing up to that current during start and run, with the 1 000 V maximum rated operational voltage providing headroom for 690 V line-to-line systems. The AC-1 maximum switching frequency of 800 operations per hour and AC-3 maximum of 1 000 operations per hour indicate the thermal cycling limits for resistive and motor loads respectively.
Coil Circuit and Auxiliary Contacts
The coil operates across 380-420 V at both 50 Hz and 60 Hz with a power factor of 0.8. Auxiliary contact ratings are specified at multiple voltages: 6 A at 24 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V — these are the switching capacities for the integrated auxiliary contacts, not the main poles. The built-in varistor protects the coil circuit from voltage transients during de-energization, eliminating the need for an external suppressor on the coil.
Physical Integration and Environmental Limits
The S6 contactor measures 172 mm high, 120 mm wide, and 170 mm deep, with screw fixing to the mounting surface. Side-by-side mounting is permitted, which allows dense panel layouts. The operating temperature range of -25 to +60 °C and storage range of -55 to +80 °C cover most industrial environments, and pollution degree 3 (conductive pollution or dry non-conductive that becomes conductive) is rated for the main current circuit — typical for control panels in factory floors. The mechanical life of 10 million operations is the expected cycle count before contact wear-out under no-load or light-load conditions.