{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BP40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 230 V AC coil, 2 NO instantaneous contacts, screw and snap-on mounting, 73 mm depth, IP20 front.","salesMarkdown":"The Siemens 3RH1122-2BP40 is a SIRIUS auxiliary contactor in size S00, with a 230 V rated coil and two normally-open instantaneous contacts. The IP20 front protection means it's suited for enclosed control panels where no washdown or dust ingress is expected at the operator interface. The contact ratings are given per voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are thermal current ratings for the auxiliary contacts — they define the maximum continuous current the contacts can carry at each voltage level. For a 24 VDC control circuit, the 10 A rating gives plenty of headroom for pilot lights, relays, or PLC inputs. At 230 V, the 6 A rating handles most contactor coils and small motor starters. The 1 A at 690 V rating is useful for higher-voltage control schemes in industrial environments. ## Coil and environmental specs The magnet coil draws 3.2 W DC for both closing and holding — a single-wattage coil, meaning no separate economizer circuit needed. The coil is rated for 230 V, so it's a direct fit for standard European control voltages. Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for machine-mounted applications near presses or conveyors. Fastening is via screw and snap-on mounting — the standard DIN rail clip for size S00 contactors. Terminal capacity is 2x (0.25 to 2.5 mm²) solid or 2x (24 to 14 AWG) for auxiliary contacts, using screw terminals. Depth is 73 mm, height 60 mm, width 45 mm — compact enough for dense panel layouts.","metaTitle":"Siemens 3RH1122-2BP40 SIRIUS Auxiliary Contactor, 230 V Coil","metaDescription":"Siemens 3RH1122-2BP40 SIRIUS auxiliary contactor, size S00, 230 V AC coil, 2 NO contacts, screw/snap-on mounting, IP20 front. Rated 10 A at 24 V, 6 A at 230 V. Current lifecycle st","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Rated Value":"230 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"1.1","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Product Brand Name":"SIRIUS","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"2","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"Cage Clamp terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=197350&mlfb=3RH1122-2BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BP40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1122-2BP40 and how do I get a price?","answer":"The 3RH1122-2BP40 is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the closest functional alternative to 3RH1122-2BP40?","answer":"The 3RH2122-1BW40 is a peer in the same SIRIUS family — same size S00, same 2 NO contact configuration, but with a different coil voltage (not 230 V). The 3RH1122-2BP40 uses a 230 V coil; the 3RH2122-1BW40 will not drop in without rewiring the coil supply. For a direct swap, match the coil voltage to your existing circuit."},{"question":"What are the key dimensions of 3RH1122-2BP40?","answer":"Depth is 73 mm, width 45 mm, height 60 mm — size S00 footprint, compact for DIN-rail mounting."},{"question":"What compliance documentation does Siemens provide for 3RH1122-2BP40?","answer":"The part is RoHS compliant with a substance prohibitance date of 07/01/2006. Pollution degree 3 rating covers industrial environments. Standard Siemens declarations of conformity and CE marking apply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BP40","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/3RH1122-2BP40 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}}