SIRIUS S00 power contactor — 3RT1016-1GX21-0AA2
The Siemens 3RT1016-1GX21-0AA2 is a SIRIUS Size S00 power contactor with screw-type terminals, designed for switching motor loads in control panels up to 4 kW at 400 V in AC-2 duty or 8.5 A in AC-4 duty. It carries a single normally-open instantaneous auxiliary contact rated at 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, covering typical PLC and relay interface levels.
Mounting and integration — 45 mm DIN-rail footprint
The 45 mm wide, 115 mm tall, 72 mm deep housing mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, fitting standard panel layouts without special adapters. Screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded conductors, with AWG equivalents 2x (20 to 16), 2x (18 to 14), or 1x 12.
Motor switching ratings and coordination
Rated for 4 kW at 400 V in AC-2 duty (slip-ring motors, moderate overloads) and 8.5 A at 400 V in AC-4 duty (plugging, inching, reversing). Motor output at 500 V is 4.5 kW and at 690 V is 5.5 kW, both at 50/60 Hz, covering common European and North American line voltages. Type 1 coordination requires a 35 A gL/gG fuse; Type 2 coordination requires a 20 A gL/gG fuse, allowing the designer to balance short-circuit withstand against component protection.
Operating temperature range is -25 to +60 °C, with pollution degree 3 (conductive pollution typical in industrial enclosures) and maximum operating altitude 2,000 m. The built-in surge suppressor uses full-wave rectification, reducing coil-emission noise and extending contact life on inductive loads.