What This Part Is and Where It Fits
The Siemens 3RT2017-1XB42-0LA2 is a SIRIUS power contactor in size S00, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, making it a direct fit for standard European-style enclosures. The DC coil is rated for 24 to 34 VDC, with a peak inrush current of 2.3 A. Coil terminals are screw-type, accepting solid or stranded conductors from 0.5 mm² up to 4 mm² per terminal.
Key Ratings and What They Mean for Your Panel
Mechanical life is rated at 30 million operating cycles typical, which means this contactor is built for high-duty applications like conveyor systems or pump stations where the contactor cycles frequently over years of service. Operating temperature range spans -40 to +70 °C, with storage from -55 to +80 °C. That covers most indoor industrial environments, including unheated warehouses, without derating concerns. Mounting position is flexible: the contactor can be rotated ±180° on a vertical surface, tilted ±22.5° forward/backward, or mounted standing on a horizontal surface. This simplifies panel layout when space is tight. Clearance distances are specified: 10 mm upwards, forwards, and downwards, and 6 mm at the sides. These are the minimum air gaps to maintain for safe operation and arc containment. Arcing time is 10 to 15 ms, and the DC dropout time is 25 to 45 ms. These timing figures matter when coordinating with upstream protective devices or sequencing multiple contactors.
Lifecycle and Sourcing Reality
For BOM freeze or PCN watch, the SIRIUS series is a mature, widely deployed platform. Replacement or second-source options within the same size S00 family exist, but any substitution should be verified for coil voltage and auxiliary contact configuration.
Integration Notes for the Panel Builder
The contactor includes an auxiliary switch as standard, which can be used for status feedback to a PLC or for electrical interlocking in reversing starter applications. Dimensions are 45 mm wide, 58 mm tall, and 73 mm deep — a compact footprint that leaves room for additional components on the DIN rail. The screw terminals accept up to 4 mm² solid conductor, sufficient for motor circuits up to the contactor's rated capacity.