Auxiliary contactor for control-circuit switching
The 3RH2353-1DW40-0KA0 is a SIRIUS auxiliary contactor from Siemens, size S00, designed for switching control circuits rather than main motor loads. The coil is 48 V DC, with a closing power draw of 4 W. The built-in varistor surge suppressor clips the inductive kick on de-energisation, which matters when the contactor is driven by a solid-state output card that cannot absorb the flyback pulse.
Panel fit and clearance
These are the free-air distances needed to prevent arc flashover between the contactor and neighbouring devices at pollution degree 3.
Switching performance and service life
The 690 V rating confirms it can switch 690 VAC control circuits in IT-grid installations where the phase-to-phase voltage exceeds 480 V.
RoHS compliance is documented with a substance prohibition date of 07/01/2006.