Siemens 3RT1036-1AL00 SIRIUS Power Contactor — Field Integration Note
The Siemens 3RT1036-1AL00 is a SIRIUS-brand power contactor in the size S2 frame, designed for switching motor loads in control panels. It carries a 22 kW rating at AC-2 duty at 400 V and a 41 A rating at AC-4 duty at 400 V — the AC-2 figure governs standard slip-ring motor starting, while the AC-4 rating covers reversing and inching applications where the contactor makes and breaks stalled rotor current. Mounting is via screw fixing or snap-on onto 35 mm DIN rail per DIN EN 50022, and side-by-side mounting is permitted without derating, which simplifies panel layout for multi-contactor motor starter groups. The front face carries an IP20 degree of protection; the terminal area is rated IP00, so the contactor is intended for installation inside an enclosure that provides the final environmental seal.
Switching Frequency and Thermal Limits
Maximum switching rates are duty-dependent: 1 000 cycles per hour at AC-1 (resistive), 800 at AC-3 (normal motor start), 400 at AC-2, and 300 at AC-4. For a conveyor line running frequent start/stop cycles, the AC-4 ceiling of 300 ops/h is the binding constraint — exceeding it risks contact welding from the arcing time of 10 to 15 ms. Operating ambient temperature spans -25 to +60 °C, with storage from -55 to +80 °C. Pollution degree 3 means the contactor is suited for industrial environments with conductive pollution, typical of factory-floor panels not hermetically sealed.
Termination and Wiring
Main current circuit connections use screw-type terminals. Solid conductors accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded conductors: 2x (0.75 to 25 mm²) for the main circuit, and solid or stranded 2x (0.75 to 16 mm²) for auxiliary circuits. The 55 mm width and 112 mm height fit the standard S2 footprint; depth is 115 mm including the arc chamber. Coil operating range at 50 Hz is 0.8 to 1.1 times rated voltage, with pick-up time of 7 to 20 ms at AC.
Lifecycle and Sourcing
RoHS compliance is documented with a substance prohibition date of 05/01/2012, indicating the part meets EU RoHS requirements for the listed substances.