{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1BP40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1BP40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1BP40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BP40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4-pole, 10 A AC-12 at 24 V, screw and snap-on mounting, 45 mm width.","salesMarkdown":"The Siemens 3RH1122-1BP40 is a SIRIUS auxiliary contactor in size S00 — a 4-pole block with 2 N/O and 2 N/C contacts (instantaneous, no delayed or lagging poles). At 45 mm wide and 72 mm deep, it fits the standard S00 footprint alongside its matching SIRIUS contactors. The headline rating is 10 A at AC-12 (resistive loads at 24 V), but the real-world switching capability varies by voltage and duty. At 230 V AC-15 (typical for solenoid valves and contactor coils) it's rated 6 A; at 400 V drops to 3 A, and at 690 V to 1 A. For DC switching, at 24 V it handles 10 A, at 110 V only 1 A, and at 220 V just 0.27 A — inductive DC loads need careful derating. The closing and holding power of the DC magnet coil is a flat 3.2 W, so the control transformer or 24 VDC supply must budget that per contactor. ## Terminal and environmental limits Screw terminals accept solid or ferruled stranded conductors: 2× 0.5–1.5 mm², 2× 0.75–2.5 mm², or 2× 4 mm². Shock resistance is 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration profiles.","metaTitle":"Siemens 3RH1122-1BP40 SIRIUS Auxiliary Contactor, 4-pole, 10","metaDescription":"Siemens SIRIUS 3RH1122-1BP40 auxiliary contactor, size S00, 4-pole, 10 A AC-12 at 24 V, screw and snap-on DIN rail mounting. Quoted 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":"230 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=476923&mlfb=3RH1122-1BP40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1BP40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RH1122-1BP40?","answer":"The 3RH2122-1BW40 is a similar SIRIUS auxiliary contactor in the same size S00, but it uses spring-cage terminals instead of screw terminals. If your panel is wired for screw terminals, the 3RH1122-1BP40 is the correct fit; rewiring would be needed to swap to the spring-cage variant."},{"question":"Will 3RH1122-1BP40 drop into a panel specified around 3RH2122-1BW40 without rewiring?","answer":"No — the 3RH2122-1BW40 uses spring-cage terminals, while this part uses screw terminals. The footprint (size S00, 45 mm width) is identical, so the mechanical mount and wiring duct positions match, but the terminal type is different."},{"question":"How do I get current pricing and availability for 3RH1122-1BP40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and confirmed availability — lead time and stock are verified at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1BP40","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/3RH1122-1BP40 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}}