Siemens 3RT1036-1BM44 SIRIUS Power Contactor – S2 Frame, 22 kW AC-2 Duty
The Siemens 3RT1036-1BM44 is a SIRIUS power contactor in the S2 frame size, rated for 22 kW at 400 V in AC-2 duty and 41 A at 400 V in AC-4 duty. It uses screw-type terminals for the main current circuit and mounts via screw or snap-on onto 35 mm standard mounting rail per DIN EN 50022. The front of the contactor carries an IP20 rating; the terminal area is IP00. Pollution degree 3 means it's rated for industrial environments with conductive pollution. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. Mechanical life is typical 10 million operations. Maximum switching rates: 1,000 ops/hr at AC-1, 400 at AC-2, 800 at AC-3, and 300 at AC-4. Side-by-side mounting is permitted without derating.
Wiring and Termination
Main circuit screw terminals accept solid conductors: 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). Solid or stranded: 2x (0.75 to 16 mm²). Minimum permissible conductor at 40 °C is 16 mm². Auxiliary contacts (rated at 24 V DC: 10 A; 60 V DC: 2 A; 110 V DC: 1 A; 220 V DC: 0.3 A; 230 V AC: 6 A; 400 V AC: 3 A) share the same terminal block. Coil dropout time at DC is 20 to 25 ms; arcing time is 10 to 15 ms.
Dimensions and Panel Fit
Dimensions: width 55 mm, height 112 mm, depth 179 mm. The S2 frame size is a standard DIN-rail footprint; verify gland plate clearance for the 179 mm depth, especially in shallow enclosures.