Auxiliary contactor, size S00 — 3 NO contacts, DC-rated switching
The Siemens 3RH2131-2BE40 is a SIRIUS auxiliary contactor in frame size S00, providing three normally-open instantaneous contacts for switching control circuits, signal interlocking, or PLC output isolation in a 45 mm wide package.
DC breaking current — what the voltage-dependent ratings mean for fit
This is the arc-quenching limit of the contact gap at each voltage — a 24 VDC solenoid valve bank pulls within the 10 A ceiling, but a 440 VDC brake coil at 0.6 A exceeds the 0.5 A rating and the contacts will not interrupt the arc reliably.
Coil drive and environmental limits
The DC magnet coil draws 4 W both during closing and holding — no inrush-to-hold differential, so the PLC output or relay driving it sees a constant 4 W load once the contactor is picked up. This makes the contactor suitable for unheated electrical rooms or outdoor enclosures provided condensation is managed.
Sourcing and lifecycle — current production, quoted to order
The contactor carries a RoHS compliance date of October 1, 2009, indicating it meets the EU RoHS substance restrictions from that date forward.