Siemens SIRIUS 3RT1034-1AP00-ZW98 — Size S2 Power Contactor
The Siemens SIRIUS 3RT1034-1AP00-ZW98 is a Size S2 power contactor designed for switching motor loads in industrial control panels. It mounts on a 35 mm DIN rail per EN 50022 via screw and snap-on fastening, with side-by-side mounting permitted for multi-contactor assemblies. The contactor carries a pollution degree 3 rating, meaning it's suited for industrial environments where conductive or dry non-conductive pollution may occur — typical for factory-floor panels not in sealed cabinets. Rated for 50 Hz operation, the contactor delivers 18.5 kW at 500 V and 10 kW at 690 V. In AC-3 duty (motor starting under load), it's rated for up to 1,000 operations per hour; AC-4 (plugging/reversing) drops to 250 ops/h. The AC-2 rating at 400 V is 15 kW, covering slip-ring motor applications. AC-4 at 400 V is rated at 29 A — that's the inching or jogging current limit, not continuous motor current. The main current circuit uses screw-type terminals, accepting solid conductors up to 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²), and stranded up to 2x (0.75–25 mm²). The front face is IP20 (finger-safe), but the terminal area is IP00 — so live parts are exposed at the wiring point. Keep the panel door interlocked or use finger-safe shrouds if maintenance access is live.
Integration & Mounting
The contactor occupies a 55 mm wide DIN-rail footprint (Size S2), with a depth of 115 mm and height of 112 mm. Side-by-side mounting is supported. Mechanical life is rated at 10 million operations typical. AC-1 allows 1,200 ops/h, AC-3 1,000 ops/h, AC-4 250 ops/h.