{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2XA31-0MA0-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2XA31-0MA0-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2XA31-0MA0-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XA31-0MA0-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-2XA31-0MA0-ZW98 auxiliary switch block, 3 NO + 1 NC, 10 A rated current, spring-loaded terminals, snap-on mounting for 3RT2 contactors and 3RH2 contactor relays, IP20 front protection.","salesMarkdown":"## What this auxiliary switch block does The 3RH2911-2XA31-0MA0-ZW98 is a front-mounted auxiliary switch block for Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays, giving you 3 normally-open and 1 normally-closed additional contact paths — terminals labelled 53/54, 61/62, 73/74, and 83/84. Rated 10 A maximum, with AC-15 switching capacity at 690 V of 1 A — that's the rating that governs pilot-duty and control-circuit reliability, not the raw thermal current. The spring-loaded terminals accept 2x 0.5–1.5 mm² with ferrule or 2x 0.5–2.5 mm² without, so you land two conductors per clamp — handy for daisy-chaining control voltage across multiple auxiliaries in a row. ## Current ratings across the voltage range The thermal current rating is 10 A at 24 V, but the useful switching current drops as voltage rises: 6 A at 230 V, 3 A at 400 V, and 0.26 A at 600 V — the arc extinction limits the contact life at higher voltages, so size your control transformer and fuse accordingly. At 24 VDC the rated operational current is 6 A; at 110 VDC it drops to 1 A, and at 220 VDC to 0.3 A — DC switching is harder on contacts because there's no natural zero-crossing, so derate more aggressively than the AC figures suggest. ## Mounting and panel fit Snap-on mounting onto the contactor or contactor relay front — no tools needed, and the 36 mm width keeps the assembly within a single DIN-rail module footprint when stacked on the base unit. Overall dimensions are 36 mm wide, 47.7 mm deep, and 41.5 mm high — the depth is the critical dimension for enclosure clearance when the contactor is mounted against a gland plate or back panel. ## Contact reliability and service life Rated for 10 million mechanical switching cycles typical — the contacts themselves will last longer than the contactor's coil life in most cycling applications. Contact reliability is specified as 1 faulty switching per 100 million operations at 17 V, 1 mA — that matters when the auxiliary feeds a PLC input or safety relay that must see every transition, even at low signal levels. ## Environmental and insulation ratings IP20 on the front face — protected against finger contact but not against moisture ingress, so keep it inside a closed panel or enclosure. Rated insulation voltage 690 V AC at pollution degree 3, with surge voltage resistance of 6 kV — suitable for 400/480 V line-to-line control circuits with adequate clearance and creepage. Operating temperature range -25 to +60 °C, storage -55 to +80 °C — covers most indoor industrial environments without derating.","metaTitle":"Siemens 3RH2911-2XA31-0MA0-ZW98 Auxiliary Switch, 3NO+1NC","metaDescription":"Siemens SIRIUS auxiliary switch block 3RH2911-2XA31-0MA0-ZW98, 3 NO + 1 NC contacts, rated 10 A, spring-loaded terminals, snap-on for 3RT2/3RH2 contactors.","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","title":"3RH2911-2XA31-0MA0-ZW98","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","description":"auxiliary switch, on the front, 3 NO + 1 NC, 53/54, 61/62, 73/74, 83/84, current path: 1 NO, 1 NC, 1 NO, 1 NO, spring-loaded terminal, for contactors 3RT2 and contactor relays 3RH2, multi-unit packaging, pack = 50 units","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":"3","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5f079c697b8ee7f0eab2743d40ba7dd2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646263&mlfb=3RH2911-2XA31-0MA0-ZW98"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-2XA31-0MA0-ZW98 and get a price?","answer":"Sourced and quoted to order against your BOM through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What does the note 'with 3RH2' mean on this part?","answer":"It means this auxiliary switch block is designed to mount on the front of Siemens 3RH2 contactor relays, in addition to 3RT2 contactors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2XA31-0MA0-ZW98","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/3RH2911-2XA31-0MA0-ZW98 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}