{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FA22-0MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FA22-0MA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FA22-0MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA22-0MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1FA22-0MA0 auxiliary switch block, 2 NO + 2 NC, 10 A, screw terminals, snap-on DIN rail mount, IP20 front.","salesMarkdown":"## Front-Mount Auxiliary Block for 3RH2 and 3RT2 Contactors The 3RH2911-1FA22-0MA0 is a front-mounted auxiliary switch block from the Siemens SIRIUS family, designed to snap onto 3RH2 contactor relays and 3RT2 power contactors — one spare part covers both families in the panel. The contact arrangement is 2 normally-open and 2 normally-closed instantaneous contacts, wired via screw-type terminals that accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors per clamp — or 2x (20 to 16) and 2x (18 to 14) AWG. The 10 A maximum thermal current (Ith) sets the continuous current ceiling for the auxiliary contacts, with the 24 V rated value also at 10 A — this block handles pilot-duty and signal-level loads, not motor power. The AC-15 rating at 690 V is 1 A, confirming suitability for solenoid and contactor coil switching in 400 V and 690 V control circuits. ## Ratings That Govern the Real Circuit Contact reliability is specified at 1 faulty switching per 100 million operations at 17 V, 1 mA — this dry-circuit performance figure is the one that matters when the block feeds a PLC input or a safety relay, not just a pilot light. The mechanical service life of 10 million operating cycles typical means the switch block outlasts the contactor it rides on under normal duty. The insulation voltage is 690 V at pollution degree 3 — the block is rated for industrial enclosures where conductive dust or condensation may be present, so no additional creepage derating is required in a standard IP54 panel. Surge voltage resistance is 6 kV, matching the impulse withstand level for 400 V distribution systems. IP20 on the front means the screw terminals are finger-safe when the panel door is open, but the block must be installed inside an enclosure — it is not rated for open-machine washdown service. ## Active Production — Sourced Per BOM This part carries an active lifecycle status from Siemens — it is current-production, not a legacy or discontinued item. There is no official successor or cross-reference because none is needed; the 3RH2911-1FA22-0MA0 is the standard front-mount auxiliary block for the SIRIUS 3RH2 and 3RT2 families. Sourced and quoted to order against the BOM quantity through independent distribution. Snap-on DIN rail mounting (35 mm per EN 60715) means no tools are needed for installation or removal — a consideration for panel builders who need to reconfigure control circuits without disturbing the main contactor wiring.","metaTitle":"Siemens 3RH2911-1FA22-0MA0 Auxiliary Switch, 2NO+2NC, 10A","metaDescription":"Siemens SIRIUS 3RH2911-1FA22-0MA0 auxiliary switch block, 2 NO + 2 NC contacts, 10 A maximum thermal current, screw terminals, IP20 front, snap-on DIN rail","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1FA22-0MA0","Height":"37.5 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"3 A","description":"auxiliary switch, on the front, 2 NO + 2 NC,.3/.4,.3/.4,.1/.2,.1/.2, current path: 1 NO, 1 NO, 1 NC, 1 NC, screw terminal, for contactors 3RT2 and contactor relays 3RH2","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay and power contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Instantaneous Contact":"2","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.21","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1846917c24a54e04e901c4cc3b8c060b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=113410&mlfb=3RH2911-1FA22-0MA0"},"ai":{"faq":[{"question":"What is the contact configuration and terminal type on the 3RH2911-1FA22-0MA0?","answer":"The block provides 2 normally-open and 2 normally-closed instantaneous contacts with screw-type terminals. The terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors, or 2x (20 to 16) and 2x (18 to 14) AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FA22-0MA0","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/3RH2911-1FA22-0MA0 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}}