The Siemens 3RH2244-4BG40 is an SIRIUS auxiliary contactor in size S00, built with four instantaneous normally-open contacts. It switches auxiliary circuits up to 690 V and carries a 10-million-cycle mechanical life – the sort of endurance that keeps a pallet of these moving through a high-cycle line without hiccups. Mounts via screw and snap-on onto 35 mm DIN rail, which means it lands in the same bolt pattern as other S00 accessories. Panel depth of 117 mm rules out shallow enclosures; the 45 mm width leaves room for a row of contactors on the rail.
Lifecycle & compliance
Active status – no LTB, no successor. The part complies with RoHS via the substance prohibition date of 2009-10-01, which covers both material restrictions and documentation for EU market traceability.
Integration notes
Coil closing and holding power is 4 W DC. Surge voltage resistance is 6 kV. Mounting position allows ±180° rotation on vertical surface and ±22.5° tilt – handy when you're stuffing a packed panel and need to angle the block to reach the wiring channel. Ambient operating range -25 to +60 °C; storage handles -55 to +80 °C.