{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1BB40-0TK0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1BB40-0TK0","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1BB40-0TK0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BB40-0TK0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil, 2 NO contacts, 10 A AC-12 rated, screw and snap-on mounting, 45 x 57.5 x 72 mm.","salesMarkdown":"It's the signal-switching half of a contactor pair — the part that tells the PLC or safety relay that the main power contactor has picked up, or that routes control voltage to the next stage in a motor starter stack. The AC-12 rated current of 10 A covers resistive and solid-state loads typical of control circuits — PLC digital outputs, relay coils, indicator lamps. Don't confuse this with AC-3 motor switching; these contacts are for pilot duty, not power. The 24 V DC coil pulls 3.2 W on pickup and holds at 3.2 W, so the control transformer or DC supply needs to deliver that continuously — no coil economizer on this variant. The 6 kV surge voltage resistance (rated impulse withstand) means this contactor can live on a 400 V panel without external surge suppression for most industrial environments, provided the panel's own SPDs are in place. Pollution degree 3 confirms it's rated for conductive environments — the typical non-cleaned panel. Terminals accept 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² solid — the dual-wire capacity is useful for daisy-chaining control voltage across multiple auxiliaries without extra terminal blocks.","metaTitle":"Siemens SIRIUS 3RH1122-1BB40-0TK0 Auxiliary Contactor, 24 V","metaDescription":"Siemens SIRIUS 3RH1122-1BB40-0TK0 auxiliary contactor, 24 V DC coil, 2 NO contacts, 10 A AC-12 rated. S00 size, 45 mm wide, snap-on DIN rail mount. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","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","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","Closing power of magnet coil at DC":"3.2 W","Holding power of magnet coil at DC":"3.2 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 61346-2":"K","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","With Degree Of Pollution 3 Rated Value":"690 V","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","Of Auxiliary Contacts Instantaneous Contact":"0","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","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"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=4304&mlfb=3RH1122-1BB40-0TK0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BB40-0TK0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH1122-1BB40-0TK0?","answer":"The 3RH2122-1BA40 is the closest functional peer — same S00 frame, 2 NO contacts, 24 V DC coil, and snap-on DIN rail mount. The main difference is the 3RH2122 uses a 42 mm wide housing versus 45 mm on the 1BB40, so verify panel cutout spacing before substituting."},{"question":"Where can I buy 3RH1122-1BB40-0TK0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What is the depth of 3RH1122-1BB40-0TK0?","answer":"The depth is 72 mm, measured from the DIN rail mounting surface to the front of the housing. This is standard for the SIRIUS S00 auxiliary contactor family."},{"question":"What wire sizes does 3RH1122-1BB40-0TK0 accept?","answer":"Terminals accept 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² solid or stranded wire. The dual-wire capacity allows looping control voltage through without additional terminal blocks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1BB40-0TK0","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/3RH1122-1BB40-0TK0 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}}