SIRIUS Power Contactor 3RT2036-3NF30 — Size S2, Spring-Terminal, 83–155 V Coil
The Siemens 3RT2036-3NF30 is a SIRIUS power contactor in Size S2, designed for switching motor loads in industrial control panels. It carries a rated coil voltage range of 83 to 155 V AC/DC, making it a common fit for 110–120 V control circuits found across European and North American installations. The spring-type terminals (cage clamp) accept 2x (0.5 to 2.5 mm²) solid or stranded wire, so no re-termination is needed when replacing an older screw-terminal contactor on a DIN-rail panel. Mounting is screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with +/-180° rotation possible on a vertical surface and +/-22.5° tilt forward/backward — useful when the contactor sits in a tight gland-plate zone. Mechanical life is typical 10,000,000 operations, and the contactor is rated for switching frequencies that match the duty: up to 1,000 cycles/hour at AC-1 (resistive), 800 at AC-3 and AC-3e (motor start/run), 600 at AC-2 (slip-ring motor), and 250 at AC-4 (plugging/inching). For a motor circuit running at 50 or 60 Hz, the coil draw is a steady 2 VA. The arcing time runs 10 to 20 ms, and opening time (AC or DC) is 30 to 55 ms — consistent with a standard SIRIUS contactor for general-purpose motor switching.
Panel Integration and Clearances
The 3RT2036-3NF30 measures 55 mm wide, 114 mm high, and 130 mm deep — a standard Size S2 footprint that fits alongside other SIRIUS components on the same DIN rail. Minimum clearances: 10 mm upwards, downwards, and forwards; 6 mm at the sides. Operating temperature range is -25 to +60 °C, storage -55 to +80 °C. The auxiliary switch is built in (18–1 main contact configuration), so no separate add-on block is required for basic status feedback.