{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2NM22-0MC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2NM22-0MC0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2NM22-0MC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NM22-0MC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RH2911-2NM22-0MC0 auxiliary switch block, 2 NO + 2 NC, one NO solid-state-compatible, spring-loaded terminals, snap-on mounting, 47.7 mm depth.","salesMarkdown":"## Solid-state-compatible NO and contact reliability at low level The 3RH2911-2NM22-0MC0 is a front-mounted auxiliary switch block for Siemens S00, S0, S2, and S3 contactors. Its contact set is 2 NO + 2 NC, with one NO specifically rated as solid-state-compatible — that means it's designed to switch the low-side leakage currents of a solid-state output without welding or failing to open, a common failure point when a standard relay contact tries to interrupt a triac's off-state current. That's the contact reliability floor — if your PLC input or safety relay expects a dry circuit signal at low voltage, this block won't bounce into an open state. ## Spring-loaded terminals and snap-on DIN rail mount No screw torque to check, no loosening under vibration — the cage clamps the conductor and holds. Snap-on mounting to DIN rail. The block measures 36 mm wide by 47.7 mm deep by 41.5 mm high — it sits flush on the contactor's front face, not stealing extra panel depth. Front protection is IP20 — finger-safe when installed, but no washdown rating. Keep it inside the enclosure. ## Control circuit draw and surge withstand The auxiliary coil or signal circuit draws 0.3 A at 24 V, 48 V, or 60 V — the same current across all three voltages, which suggests an internal current-limiting circuit rather than a simple coil. Budget that draw into your 24 VDC supply sizing; it's not a relay coil inrush. Rated surge voltage resistance is 6 kV, and insulation voltage at pollution degree 3 is 690 V AC. That covers most 400 V line-to-line panels with margin. Sourced to order against the BOM quantity.","metaTitle":"Siemens 3RH2911-2NM22-0MC0 Auxiliary Switch, 2NO+2NC, 0.3A","metaDescription":"Siemens 3RH2911-2NM22-0MC0 auxiliary switch block, 2 NO + 2 NC contacts, one solid-state-compatible NO. Spring-loaded terminals, snap-on mount. 0.3 A at 24 V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","title":"3RH2911-2NM22-0MC0","Height":"41.5 mm","at 24 V":"0.3 A","at 48 V":"0.3 A","at 60 V":"0.3 A","description":"auxiliary switch, solid-state compatible, on the front, 2 NO + 2 NC, 13/14, 23/24, 31/32, 41/42, current path: 1 NO (solid-state compatible), 1 NO, 1 NC, 1 NC, spring-loaded terminal, for 3RT102..-.X...-0LA(0.2) with adapter 3RT2926-4NA00 and for 3RT103..-.X...-0LA(0.2) with adapter 3RT2936-4NA00","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Suitability For Use":"power contactor","Instantaneous Contact":"2","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"one incorrect switching operation of 100 million switching operations (5 V, 1 mA)","mirror contact according to IEC 60947-4-1":"No","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","Mechanical Service Life (Operating Cycles) Typical":"5 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2fd054242100412b112b7c934d539579.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458576&mlfb=3RH2911-2NM22-0MC0"},"ai":{"faq":[{"question":"What contact configuration does 3RH2911-2NM22-0MC0 have?","answer":"It has 2 normally-open and 2 normally-closed instantaneous contacts. One of the NO contacts is specified as solid-state-compatible for switching low-level leakage currents."},{"question":"What is the physical size of 3RH2911-2NM22-0MC0?","answer":"The block dimensions are 36 mm wide, 47.7 mm deep, and 41.5 mm high. It mounts via snap-on to DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2NM22-0MC0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RH2911-2NM22-0MC0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}