SIRIUS Size S2 Power Contactor — 3RT2035-1AM70-ZX95
The Siemens SIRIUS 3RT2035-1AM70-ZX95 is a Size S2 power contactor rated for motor and resistive loads. It carries a 40 A rating at 480 V and delivers 7.5 hp at 230 V, per the datasheet. The coil is wound for 200–240 V at 50 Hz, drawing 17.2 VA at 50 Hz and 16.5 VA at 60 Hz. Screw-type terminals on the magnet coil and an integrated auxiliary switch are standard. Mechanical life is rated at 10 million operations typical.
Mounting and Integration
Fastens via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°. Clearance distances: 10 mm upwards, forwards, and downwards; 6 mm at the side. Dimensions are 114 mm height, 55 mm width, 130 mm depth. Wire acceptance: 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) solid or stranded.
Duty Ratings and Switching Frequency
Maximum switching frequency varies by duty: AC-1 at 1 200 operations/hour, AC-2 at 750, AC-3 at 1 000, AC-3e at 1 000, and AC-4 at 300. Arcing time is 10–20 ms; operate time at AC is 10–18 ms. Main contact configuration is 18 normally open contacts. Ambient operating range is -25 to +60 °C; storage range is -55 to +80 °C.
Auxiliary Contact Ratings
Auxiliary switch ratings per the datasheet: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V.