What it is and where it fits
The Siemens 3RT1036-1AP00-ZW98 is a SIRIUS power contactor in size S2, rated for a rated insulation voltage of 690 V. It is designed for switching motor loads in industrial control panels and mounts via screw and snap-on onto a 35 mm DIN rail per DIN EN 50022.
Key ratings and what they mean for your panel
The 690 V rated insulation voltage covers most 400 V and 480 V line-to-line systems with headroom for grounded-wye configurations. The S2 frame size determines the physical footprint and the maximum contactor current — expect this to handle motor currents typical of a 30 kW load at 500 V or 11.4 kW at 690 V. Screw-type terminals on the main circuit accept solid conductors from 2x 0.5 mm² up to 2x 4 mm² and stranded up to 2x 25 mm². That's enough for most motor feeder cables up to 6 AWG. The IP20 front means it's finger-safe once installed in a closed panel; the terminal area itself is IP00, so live parts are exposed during wiring — standard for panel-mount contactors. Mechanical life is typical at 10 million operations. Switching frequency ranges from 300 cycles/hour at AC-4 (the toughest motor inching/jogging duty) up to 1,000 cycles/hour at AC-1 (resistive loads). For a motor-starting application (AC-3), expect 800 cycles/hour.