S00 auxiliary switch for contactor relay and power contactor duty
The Siemens 3RH2911-1DA02 is a SIRIUS S00 auxiliary switch designed for lateral snap-on mounting alongside contactor relays and power contactors in the S00 frame size. At 10 mm wide, it occupies one slot on the DIN rail — the narrowest footprint in the SIRIUS auxiliary range — so it fits into densely packed panels where every millimeter matters for gland-plate fill factor. Rated operational current at 24 V is 6 A; at 230 V it delivers 6 A; at 400 V it switches 3 A. The AC-15 rated values for contactor relay duty are higher — 10 A at 24 V, 3 A at 110 V, 1.2 A at 220 V — reflecting the inductive load switching capability for solenoid and contactor coils.
Contact reliability and mirror contact compliance
The auxiliary contacts are rated for 1 faulty switching per 100 million operations at 17 V, 1 mA — this is the dry-circuit reliability floor for PLC-level signals where oxidation on unmated contacts can cause intermittent faults. The switch also qualifies as a mirror contact per IEC 60947-4-1 when used with 3RT2 contactors, meaning the NC position mechanically reflects the main contact state for safety circuit isolation. Surge voltage resistance is 6 kV, covering the impulse voltage withstand for 400 VAC industrial networks per IEC 60947-1 overvoltage category III. This matters when the switch is wired in a safety chain that must survive transient events without false triggering.
Current production — sourcing and compliance
Sourced and quoted to order against the BOM quantity through independent distribution. Availability and current pricing confirmed at RFQ time — no stock-holding claim is made here.