The Siemens SIRIUS 3RV2901-1D-ZX90 is a transverse auxiliary switch that mounts on the front of 3RV2 circuit-breakers in frame sizes S00, S0, S2, and S3. It provides one changeover (CO) contact — that is, one normally-open and one normally-closed pair sharing a common terminal — wired via screw-type terminals.
The contact carries 10 A at 690 V under AC-12 duty (resistive loads — the standard for auxiliary contact rating). That 10 A figure at 690 V is the maximum thermal current the contact can handle continuously. For inductive or motor-control circuits (AC-15), the rating drops to 0.5 A at 690 V — a meaningful derating that matters if you're switching contactor coils or small solenoid valves. At lower voltages the current capability is higher: 1 A at 24 V, 3 A at 230 V, and 1.5 A at 400 V. The 0.1 A rating at 250 V looks like a specific test condition (likely DC or a particular load type) rather than the general AC-12 curve.
This is a current-production part, not subject to phase-out or last-time-buy.
Wiring and packaging detail
Screw-type terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), with the same ranges for finely stranded wire with ferrule. AWG equivalents are 20 to 14 for the auxiliary contact wiring. The part ships in multi-unit packaging of 500 units — a bulk format for OEM panel builders or large maintenance spares orders.
Compliance documentation
The substance prohibition date of 10/01/2009 aligns with RoHS compliance (EU RoHS took effect 2006, with later amendments). The SIRIUS series carries CE marking and UL/CSA certification per Siemens standard practice for this product family. Full compliance documentation (declaration of conformity, RoHS/REACH certificates) is available on request with the RFQ.