The Siemens 3RH2431-1AP60 is a latched contactor relay from the SIRIUS 3RH2 family, configured with 3 normally-open and 1 normally-closed contact. It is designed for switching control circuits in industrial panels where the contactor must hold its state without continuous coil power — the latching mechanism maintains position after the coil pulse drops, which cuts coil power consumption and heat buildup in the enclosure. Screw terminals and frame size S00 mean it fits the compact DIN-rail footprint common in SIRIUS motor starter assemblies — expect a 45 mm width per pole on the rail, leaving room alongside overload relays and busbars.
RoHS compliance is confirmed effective from October 1, 2009, and REACH candidate-list information is published by Siemens.
The S00 frame size and screw terminals make this a direct swap into existing SIRIUS starter assemblies — same mounting hole pattern, same terminal pitch as the 3RT2 contactors it pairs with. Packaging dimensions of 96 x 75 x 83 mm give the panel builder a clear envelope for rail spacing and gland-plate clearance.