The Siemens 3RT2036-3XJ44-0LA2 is a SIRIUS S2-size contactor with a DC coil featuring an extended operating range, terminated with spring-type terminals. The DC coil's extended operating range means it holds in across a wider voltage band than a standard coil — useful on lines with saggy 24 VDC supplies or long cable runs.
Mounting & Panel Fit
Width of 55 mm and depth of 178 mm; height is 114 mm.
Coil & Switching Performance
Rated coil voltage is 72 V DC. Switching times: DC closing time 30...55 ms, arcing time 10...20 ms. The contactor is rated for AC-4 duty at 250 operations per hour maximum — that's the plugging/reversing/inching duty class, so it handles frequent jogging on a conveyor or hoist. At 24 V DC the rated operational current for the main contacts is 6 A; at 48 V DC it's 2 A; at 110 V DC it's 1 A; at 220 V DC it's 0.3 A. These DC ratings are for resistive loads — if you're switching DC motors or solenoids, derate further or add a flyback diode.
Environmental & Mechanical Life
The contactor is rated for 10,000,000 mechanical operations typical, so it outlasts the machine in most cyclic applications.