What this reversing contactor assembly delivers
The Siemens 3RA2317-8XB30-2AH0 is a SIRIUS reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock, ready to reverse a three-phase motor without you having to source and link two separate contactors and a mechanical interlock block. It ships with two 3RT2017-2AH02 contactors already installed and interlocked, saving panel build time and eliminating wiring errors between the forward and reverse contactors.
Mounting and wiring — panel-fit details
Size S00 frame keeps the footprint compact: 90 mm wide, 84 mm high, 83 mm deep — fits the standard S00 slot in a Siemens motor starter lineup. The coil is terminated with spring-type terminals as well, so the control wiring is tool-less too — a real time-saver when you're wiring a dozen of these in a row.
Environmental and mechanical endurance
Operates from -25 to +60 °C ambient; storage range is -55 to +80 °C — covers most indoor panel environments without derating concerns. Mechanical life is 10 million operating cycles typical for the contactor size — the reversing assembly's life is driven by the contactors themselves, so expect that endurance in forward-reverse cycling unless the application is heavy inrush. Shock resistance at AC and DC is 11.4 g for 5 ms and 7.3 g for 10 ms — sufficient for industrial panel vibration; the screw-on DIN rail mount keeps it secure under those conditions.