{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BD40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1122-2BD40, size S00, 42 V DC coil, 10 A AC-12 rated, IP20 front, screw and snap-on mounting, current lifecycle stage.","salesMarkdown":"The Siemens 3RH1122-2BD40 is a SIRIUS auxiliary contactor in size S00, rated for a 42 V DC coil. The 10 A AC-12 rating covers resistive and lightly inductive loads typical for control-circuit switching — think PLC outputs, pilot lights, or small contactor coils. The 6 kV rated surge voltage resistance means it's designed for industrial environments with moderate transient energy, not just clean office power. ## Wiring and contact configuration The contactor carries 2 instantaneous contacts and no delayed or make-before-break contacts. The auxiliary switch extension is available as an add-on, so you can field-upgrade contact count without swapping the base unit. Shock resistance is 10g / 5 ms and 5g / 10 ms — sufficient for normal industrial vibration but not for high-shock applications like stamping presses. RoHS compliance is indicated by the substance prohibitance date of 07/01/2006.","metaTitle":"Siemens 3RH1122-2BD40 SIRIUS Auxiliary Contactor, 42 V DC Co","metaDescription":"Siemens 3RH1122-2BD40 SIRIUS auxiliary contactor, 42 V DC coil, 10 A AC-12 rated, size S00. IP20 front, screw and snap-on mounting. Current lifecycle stage. Quoted to order against","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":"42 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","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (24 ... 14)","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=267253&mlfb=3RH1122-2BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BD40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RH1122-2BD40?","answer":"The depth is 73 mm. That's the dimension from the DIN-rail mounting surface to the front of the housing — factor in wiring clearance and door clearance."},{"question":"What compliance documentation is available for the 3RH1122-2BD40?","answer":"RoHS compliance is indicated by the substance prohibitance date of 07/01/2006. The SIRIUS series typically carries IEC/EN 60947-5-1 and UL/CSA certifications; request the specific declaration from your distributor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BD40","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/3RH1122-2BD40 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}}