The Siemens 3RT2035-1AC20-ZX95 is a SIRIUS S2 power contactor with a 24 V 50/60 Hz coil drawing 0.36 A at 50 Hz and 0.39 A at 60 Hz. It carries 40 A at 480 V under AC-3e duty — that's the motor-switching rating that governs real-world sizing for three-phase induction motors up to 7.5 hp at 230 V. The coil terminals are screw-type; main and auxiliary contacts are also screw-terminated.
Mounting and panel fit
Mounts 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 ±22.5° forward/backward tilt — useful when the gland plate forces an odd orientation. Dimensions: 114 mm high, 55 mm wide, 130 mm deep. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the sides. That 55 mm width is the same as the 3RT2036 sibling, so a panel laid out for the larger contactor accepts this one without shifting the DIN rail.
Switching performance and auxiliary contacts
Arcing time runs 10–20 ms; operate time 10–18 ms at AC. The contactor carries one auxiliary switch block (18–1 configuration on the main contacts). Auxiliary contact ratings: 10 A at 24 V, 2 A at 48/60 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. Maximum switching rates: 1200 cycles/hour at AC-1, 750 at AC-2, 1000 at AC-3/AC-3e, 300 at AC-4. Mechanical life is 10 million operations typical.
Environmental range and wiring
Operating temperature -25 to +60 °C; storage -55 to +80 °C. Accepts 2× (0.5–1.5 mm²) or 2× (0.75–2.5 mm²) solid or stranded wire per terminal. The S2 frame size is the same physical footprint as the 3RT2036, so a swap between the two requires no panel rework — only the coil voltage and current rating differ.