{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2XB22-0MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2XB22-0MA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2XB22-0MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XB22-0MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH2911-2XB22-0MA0, 2 NO + 2 NC (with leading/lagging), spring-loaded terminals, 10 A maximum, snap-on mounting for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"The Siemens 3RH2911-2XB22-0MA0 is a front-mounted auxiliary switch block in the SIRIUS family, designed to snap onto 3RT2 power contactors and 3RH2 contactor relays. It provides 2 normally-open and 2 normally-closed auxiliary contacts — one NO is leading, one NC is lagging — giving you sequenced signal feedback for interlocking or status indication in a control panel. Rated for a maximum of 10 A, the switching capacity depends heavily on the circuit voltage. At 24 V it handles 6 A (AC-15 at 690 V is rated 1 A). The insulation voltage is 690 V with pollution degree 3, and the contacts are surge-tested to 6 kV — so it's built for industrial environments where voltage transients are common. The spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferrule, or 2x (0.5 to 2.5 mm²) solid, or 2x AWG 20–14. That means you can land two conductors per terminal without a screwdriver — useful when daisy-chaining auxiliary supply or signal loops. Snap-on mounting directly onto the front of the 3RT2 or 3RH2 base unit — no tools, no DIN rail. The block is 36 mm wide, 47.7 mm deep, and 41.5 mm high, so it stays within the contactor envelope. Two instantaneous contacts plus one leading NO and one lagging NC let you wire a feedback path that closes before the main poles or opens after — useful for safety interlock sequences or to signal a 'ready' state ahead of the power circuit. ## Switching capacity breakdown At 24 V DC: 6 A. At 60 V DC: 2 A. At 110 V DC: 1 A. At 125 V DC: 6 A. At 220 V DC: 0.3 A. At 230 V AC: 6 A. At 250 V AC: 6 A. At 400 V AC: 3 A. The AC-15 rating at 690 V is 1 A — that's the inductive contactor-coil switching duty at the highest voltage. Mechanical life is 10 million switching cycles typical.","metaTitle":"Siemens 3RH2911-2XB22-0MA0 SIRIUS Auxiliary Switch, 2NO+2NC,","metaDescription":"Siemens SIRIUS 3RH2911-2XB22-0MA0 auxiliary switch block for 3RT2/3RH2 contactors. 2NO+2NC, spring-loaded terminals, snap-on mount, 10A max, 690V insulation. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","Height":"41.5 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","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)","Without Core End Processing":"2x (0.5 ... 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 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e2d36664064ff97ab351824e53a6b006.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=187902&mlfb=3RH2911-2XB22-0MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XB22-0MA0/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH2911-2XB22-0MA0 used for?","answer":"It is a front-mounted auxiliary switch block for Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays, providing 2 NO + 2 NC contacts (one NO leading, one NC lagging) for status feedback, interlocking, or signal extension in motor control circuits."},{"question":"Will 3RH2911-2XB22-0MA0 fit on a 3RH2122-2AV60 contactor relay?","answer":"Yes — the 3RH2911-2XB22-0MA0 is designed to snap onto the front of 3RH2 contactor relays, which includes the 3RH2122-2AV60. No rewiring or adapter needed; the spring-loaded terminals match the same wire range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2XB22-0MA0","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/3RH2911-2XB22-0MA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}