The Siemens 3RT2036-3AB00-ZW96 is a SIRIUS power contactor in size S2, rated for AC-3e and AC-3 duty at 51 A, delivering 22 kW at 400 V for standard three-phase motor switching. This is the multi-unit packaging variant, packed in 15 units per carton. The 800 1/h maximum switching rate at AC-3 (and AC-3e) means this contactor is built for moderate-cycle applications — think conveyor sections, pump starts, or compressor cycling — not for high-speed jogging or rapid reversing where a contactor rated 1500+ 1/h would be needed. For a size S2 frame, the 51 A AC-3e rating gives it headroom above the typical 40 A class, suiting it for 15 kW motors at 230 V, 22 kW at 400 V, 30 kW at 500 V, and 22 kW at 690 V.
The main circuit uses screw terminals — solid or stranded up to what the terminal accepts; the control and auxiliary circuit uses spring-loaded terminals, which speeds up wiring in the panel and eliminates the need for re-torquing during commissioning. The built-in 1 NO + 1 NC auxiliary contact covers basic feedback and interlocking without an add-on block. The 24 V AC coil is specified for 50 Hz only.
The contactor carries a Substance Prohibitance date of 10/01/2014, indicating RoHS compliance (EU RoHS, likely RoHS 2). The SIRIUS series carries UL/CSA/CE approvals as standard, though specific certification marks are not listed in this variant's spec excerpt.