Siemens 3RT1036-1AP60 SIRIUS Power Contactor
The Siemens 3RT1036-1AP60 is a SIRIUS power contactor in size S2, designed for switching motor loads in industrial control panels. It carries a 30 kW rating at 500 V in AC-3 duty, meaning it handles the inrush and breaking of squirrel-cage motors up to that power level. The AC-2 rating of 22 kW at 400 V covers slip-ring motor applications where the switching frequency is lower but the load current is sustained. Mounting is screw and snap-on onto 35 mm DIN rail per EN 50022, with side-by-side mounting permitted — no derating gaps required between units in a row. The 55 mm width and 112 mm height fit standard panel layouts; depth is 115 mm, which clears most enclosure depths without interfering with gland plates or busbar runs. Terminals are screw-type on the main circuit, accepting solid conductors from 0.5 mm² up to 4 mm² (two per clamp) and stranded up to 25 mm². Pollution degree 3 means it tolerates conductive dust and humidity typical of industrial environments without tracking. The front face carries IP20 protection; the terminal area is IP00, so it requires enclosure-level protection against accidental contact.
Ratings and Switching Performance
The contactor is rated for 50/60 Hz operation with an operating range of 0.8 to 1.1 times the rated voltage at both frequencies. Mechanical life is 10 million operations typical. Maximum switching rates vary by duty: 1000 cycles per hour in AC-1 (resistive loads), 800 in AC-3 (motor starting), 400 in AC-2 (slip-ring motors), and 300 in AC-4 (plugging/inching). The AC operate time is 7 to 20 ms, with an arcing time of 10 to 15 ms — fast enough for most motor control sequences. Auxiliary contact ratings cover common control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. These handle direct PLC outputs or relay interface modules without intermediate contactors for most signal loads.