{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BV40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BV40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BV40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 36 V DC coil, 10 A at 24 V, 2 NO + 2 NC, screw/snap-on mounting, IP20 front, current lifecycle.","salesMarkdown":"The 36 V DC coil draws 3.2 W for both closing and holding, so the power supply budget is flat — no inrush spike to size around. Rated 10 A at 24 V for resistive loads, with a surge voltage withstand of 6 kV (pollution degree 3), it handles the dirty electrical environment you get in a mixed panel with drives and contactors. The 45 mm width and 73 mm depth fit the standard S00 footprint — no surprises on the gland plate. Terminal accepts 2x (0.25... 2.5 mm²) solid or 2x (24... 14) AWG stranded. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so you can fit it into tight corners or angled subpanels without derating. ## Contact configuration and switching reliability Carries 2 instantaneous NO contacts and 2 NC contacts — no delayed, lagging, or make-before-break options on this variant. The contact reliability spec is one incorrect switching per 100 million operations at 17 V, 1 mA, which matters when you're switching PLC-level signals where dry contacts can oxidize.","metaTitle":"Siemens 3RH1122-2BV40 SIRIUS Auxiliary Contactor, 36 V DC, 1","metaDescription":"Siemens 3RH1122-2BV40 SIRIUS auxiliary contactor, 36 V DC coil, 10 A rated at 24 V, size S00, IP20, current lifecycle. Sourced to order against RFQ.","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":"36 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=231609&mlfb=3RH1122-2BV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BV40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH1122-2BV40?","answer":"The 3RH2122-1BW40 is a peer in the same SIRIUS auxiliary contactor family. The 3RH1122-2BV40 uses a 36 V DC coil; the 3RH2122-1BW40 uses a different coil voltage. Verify coil compatibility before substituting — the footprint and contact arrangement are similar, but the coil draw may differ."},{"question":"Will 3RH1122-2BV40 drop into a panel specified around 3RH2122-1BW40 without rewiring?","answer":"Both are size S00 with the same 45 mm width and screw/snap-on mounting, so the mechanical footprint matches. The terminal capacity is identical (2x 0.25–2.5 mm² solid). The difference is the coil voltage — 36 V DC on this part versus whatever the 3RH2122-1BW40 carries. If the panel's control voltage is 36 V DC, it drops in without rewiring; if not, the coil won't pull in."},{"question":"What compliance documentation does this brand provide for 3RH1122-2BV40?","answer":"The part carries a RoHS compliance date of 07/01/2006. It is a Siemens SIRIUS product; standard documentation includes the CE declaration of conformity and the manufacturer's RoHS declaration. REACH and UKCA documentation may not be included on older stock — request the declaration pack at quote time if your QA requires it."},{"question":"Where can I buy 3RH1122-2BV40?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BV40","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/3RH1122-2BV40 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}}