What this coupling relay switches and where it fits
The Siemens 3RH2131-2HB40 is a SIRIUS coupling relay designed for switching auxiliary circuits in control panels — it is not a main power contactor but a signal-level interface between a PLC output and a higher-current load or another relay bank.
Rated operational current across the voltage range
The 10 A at 230 V rating is the typical ceiling for general-purpose auxiliary switching; at 690 V the same contacts are limited to 1 A, so a 690 V load drawing more than 1 A would need a larger contact block or a different relay.
Lifecycle status and sourcing posture
RoHS compliance is declared with a substance prohibition date of 10/01/2009, covering the standard EU RoHS scope.