SIRIUS Size S00 Power Contactor, 24 VDC Coil — Spring-Type Terminals
The Siemens SIRIUS 3RT2017-2BB42-1AA0-ZX95 is a size S00 power contactor with a 24 VDC magnet coil terminated via spring-type terminals. It switches motor loads in control panels and is rated for AC-3 duty at up to 750 switching cycles per hour — the figure that governs real motor-starting life, not the higher AC-1 resistive rating. The coil holds at 24 VDC nominal; dropout occurs below the pick-up threshold, so verify your control supply stays above that during brownout conditions.
Mounting and Clearance — DIN Rail Fit
Snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715, or screw-fasten directly. The contactor measures 45 mm wide by 70 mm tall by 73 mm deep — a compact S00 footprint that leaves room alongside overload relays and busbars. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side for arc dissipation and airflow. Standing mounting position on a horizontal surface is specified; derate if you must mount on its side.
Switching Ratings and Mechanical Life
Rated operational current at 24 V is 10 A; at 400 V it is 3 A. The contactor is also rated for 2 hp at 230 V. Arcing time is 10 to 15 ms, and DC switching times are 7 to 13 ms. Mechanical life is rated at 30,000,000 typical operations — this is the contactor body itself, not the contacts under load. For AC-4 duty (plugging / inching) the maximum switching frequency drops to 250 1/h; stay within that for severe switching applications.
Terminal Capacity and Auxiliary Contacts
Spring-type terminals accept solid or stranded conductors from 0.5 to 4 mm², or 2x (0.5 to 4 mm²) for looping through. The contactor includes an auxiliary switch. Ambient operating range is -25 to +60 °C; storage range is -55 to +80 °C.