Siemens SIRIUS 3RT2036-1XB40-0LA2 — Size S2 Power Contactor, 24 V DC Coil
The Siemens SIRIUS 3RT2036-1XB40-0LA2 is a size S2 power contactor designed for switching motor loads and resistive circuits in industrial control panels. It carries a 24 V DC coil with screw-type terminals, making it a direct-fit replacement or new-build component for 24 VDC control systems. The contactor is rated 52 A at both 480 V and 600 V, which means it handles full-load current for motors up to roughly 30 hp at 480 V — a common rating for medium-horsepower pumps, conveyors, and compressors in North American 480 V plants. The 52 A figure also covers resistive heating loads at those voltages. Mounting is via screw and snap-on onto 35 mm DIN rail per DIN EN 60715. The S2 frame size is 114 mm high, 55 mm wide, and 130 mm deep.
Ratings and Switching Performance
The coil draws a 3 A inrush peak at 24 V DC. Closing time is 30 to 55 ms, arcing time 10 to 20 ms. The auxiliary switch is included. Switching frequency at AC-4 is rated at 250 operations per hour maximum. Mechanical life is 10 million operations.