Siemens SIRIUS 3RT2035-3AB00-ZX95 — Size S2 Power Contactor, Spring-Terminal, 24 V 50 Hz Coil
The Siemens 3RT2035-3AB00-ZX95 is a SIRIUS-branded power contactor in the size S2 frame, rated for 40 A at 480 V and 7.5 hp at 230 V. The coil is 24 V at 50 Hz. It carries spring-type terminals on the magnet coil and main contacts, and includes an auxiliary switch. Mounting is screw and snap-on onto 35 mm DIN rail per DIN EN 60715, with the mounting position allowing +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward. Clearance requirements: 10 mm upwards, forwards, and downwards; 6 mm at the side.
What the Ratings Mean for Panel Fit
At 55 mm wide and 114 mm tall, this S2 contactor fits standard DIN-rail spacing. The 130 mm depth leaves room for wiring ducts and gland plates in a 200 mm deep enclosure. Spring-type terminals accept 2x (0.5 to 2.5 mm²) solid or stranded — no ferrule needed, which speeds panel wiring. The 10 mm clearance above and below, plus 6 mm side clearance, is the minimum for arc flash and heat dissipation; crowding it reduces the 1 200 1/h AC-1 switching rate.
Duty Cycle and Switching Performance
The contactor is rated for 1 200 operations per hour in AC-1 resistive duty, 1 000/h in AC-3 motor switching, and 300/h in AC-4 plugging/reversing. Mechanical life is typical 10 million operations. Operating time at AC is 10 to 18 ms, with arcing time of 10 to 20 ms — fast enough for most motor start/stop sequences but not for high-speed inching without derating.
Environmental Range
Operating temperature spans -25 to +60 °C; storage from -55 to +80 °C. The storage limit governs handling and shipping, not running. The 50 Hz coil draws 0.37 A at 24 V rated value.