The Siemens SIRIUS 3RT1036-3BB40-ZN88X95 is a size S2 power contactor with a 24 VDC coil, rated for switching motor loads in industrial control panels.
Rated for AC-3 duty at 400 V at 22 kW, this contactor handles typical three-phase induction motor starting and running without welding the main contacts. The AC-4 rating at 400 V at 41 A covers reversing or inching applications where the contacts break full-load current frequently. Mechanical life is 10,000,000 operations typical. The coil draws 10 A at 24 V rated value, with a dropout time of 20 to 25 ms at DC.
Wiring and Integration
Main circuit terminals are screw-type, accepting 2x solid wires from 0.25 to 2.5 mm² or 2x stranded from 0.75 to 25 mm². Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. The storage range is wider because the contactor isn't dissipating coil heat — handling, not running, is what that limit governs.
