Siemens 3RT2036-1AL24 SIRIUS Power Contactor — 24 VDC Coil, Size S2, 52 A at 480 V
The Siemens 3RT2036-1AL24 is a SIRIUS power contactor in size S2, designed for switching motor loads and resistive circuits in industrial control panels. Its magnet coil operates on 24 VDC, drawing 6 A at rated voltage, and uses screw-type terminals for main and coil connections. The main contacts are rated 52 A at 480 V in AC-3 duty (motor switching), making it suitable for controlling induction motors up to that current draw.
Mounting & Integration
Fastens via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, fitting standard panel layouts. Dimensions: 55 mm wide, 114 mm high, 174 mm deep — the depth is the key dimension to check against enclosure depth and door clearance. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight cabinets. Clearance spacings: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side — maintain these for heat dissipation and arc flash protection.
Duty Ratings & Switching Life
Rated for AC-3 motor switching at up to 800 operations per hour, AC-1 resistive load at 1000 ops/h, AC-2 at 600 ops/h, and AC-4 (plugging/inching) at 250 ops/h. Mechanical life typical at 10,000,000 operations; arcing time 10–20 ms, closing time 10–18 ms. The S2 frame size and 55 mm width place it between the smaller S0 (3RT2016 series) and larger S3 frames — it handles higher motor currents than the S0 but fits the same DIN footprint width as S0 (55 mm).
Environmental & Compliance
Operating temperature range -25 to +60 °C; storage range -55 to +80 °C. The product is part of Siemens' SIRIUS line, which carries IEC/EN 60947-4-1 compliance and UL/CSA certifications typical for industrial contactors.