{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2BM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2BM40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2BM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 2 normally open instantaneous contacts, screw and snap-on mounting, IP20, rated 10 A at 24 V / 6 A at 230 V, depth 73 mm.","salesMarkdown":"It provides two normally open instantaneous contacts, rated for 10 A at 24 V and 6 A at 230 V, with a surge voltage resistance of 6 kV. Rated for pollution degree 3, it suits environments with conductive contamination. This flexibility simplifies integration into existing panel layouts where space or orientation is constrained. The 10 A rating at 24 V DC covers typical PLC digital output loads and relay coils. At 230 V AC the contactor handles 6 A, enough for small solenoid valves or indicator circuits. The 6 kV surge voltage rating means it withstands switching transients common in industrial environments without contact welding or insulation breakdown. Contact reliability is specified as one incorrect switching operation per 100 million cycles at 17 V and 1 mA — important for low-energy signal switching where oxide films on contacts can cause intermittent faults. The mechanical endurance of 30 million operations is typical for a SIRIUS auxiliary contactor in cyclic service. Wire termination accepts 2x (0.25 to 2.5 mm²) solid or stranded conductors. The 3RH1122-2BM40 is the auxiliary contactor companion to Siemens SIRIUS contactors in size S00. If a panel was specified around a 3RT1015 contactor, this auxiliary contactor shares the same S00 footprint and mounting rail, so it drops in without rewiring the main power circuit. Verify the coil voltage of the main contactor separately — this listing is for the auxiliary block only. At 45 mm wide, 60 mm tall, and 73 mm deep, this auxiliary contactor occupies a single 45 mm DIN-rail module. The depth of 73 mm means it clears most standard 80 mm deep enclosures, but check gland plate clearance if the panel is shallow. Shock resistance is 10g for 5 ms and 5g for 10 ms, covering most industrial vibration environments up to moderate shock.","metaTitle":"Siemens 3RH1122-2BM40 SIRIUS Auxiliary Contactor, Size S00,","metaDescription":"Siemens SIRIUS 3RH1122-2BM40 auxiliary contactor, size S00, 2 NO contacts, rated 10 A at 24 V, 6 A at 230 V, IP20, 73 mm depth, current production.","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":"220 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)":"01.07.2006 00:00:00","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","reference code acc. to IEC 81346-2":"K","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","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=266100&mlfb=3RH1122-2BM40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2BM40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this auxiliary contactor?","answer":"The depth is 73 mm. Combined with a width of 45 mm and height of 60 mm, it fits a standard 45 mm DIN-rail footprint."},{"question":"What wire sizes does the terminal accept?","answer":"It accepts 2x (0.25 to 2.5 mm²) solid conductors. For stranded wire, use ferrules within the same cross-section range."},{"question":"Will this drop into a panel specified for a 3RT1015-1BB42 without rewiring?","answer":"The 3RH1122-2BM40 shares the same SIRIUS S00 footprint and DIN-rail mounting as the 3RT1015 series contactors. It will mount on the same rail and the auxiliary wiring terminals are in the standard positions, so no rewiring of the main power circuit is needed. Verify the coil voltage of the main contactor is compatible with your control voltage."},{"question":"What compliance documentation is available?","answer":"The part carries a substance prohibition date of 01.07.2006, indicating RoHS compliance. The reference code per IEC 81346-2 is K (contactors/relays). For specific UL, CSA, or CE certificates, request the manufacturer's declaration with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2BM40","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/3RH1122-2BM40 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}}