{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2KV40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2KV40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2KV40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KV40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 36 VDC coil with integrated varistor, 2 NO + 2 NC contacts, screw and snap-on mounting, IP20 front.","salesMarkdown":"It carries 2 normally-open and 2 normally-closed instantaneous contacts, with no make-before-break or delayed switching elements. The coil is rated 36 VDC with an integrated varistor surge suppressor, drawing 11 W during pickup and 4 W holding. This built-in suppression means you don't need an external flyback diode or RC snubber across the coil — the varistor handles the inductive kick, which simplifies panel wiring and reduces component count. ## Switching capacity and contact reliability The auxiliary contacts are rated for switching at multiple voltage levels: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are the thermal continuous current ratings at each voltage — the actual making/breaking capacity for inductive loads will be lower, so size the contacts to the inrush of whatever pilot device (relay, PLC input, solenoid valve) they drive. Terminals accept 2x solid conductors from 0.25 to 2.5 mm². Shock resistance is 10g for 5 ms and 5g for 10 ms — sufficient for most industrial machinery but not for extreme vibration environments like crushers or off-road vehicles. The substance prohibitance date of 07/01/2006 aligns with RoHS compliance. The coil's closing power of 11 W and holding power of 4 W are within the range a typical 36 VDC power supply can handle — just check the supply's inrush rating if multiple contactors pick up simultaneously.","metaTitle":"Siemens 3RH1122-2KV40-1AA0 SIRIUS Auxiliary Contactor, S00,","metaDescription":"Siemens SIRIUS 3RH1122-2KV40-1AA0 auxiliary contactor, size S00, 36 VDC coil with varistor, 2 NO + 2 NC contacts, IP20 front, screw/snap-on mount. Active production, sourced to ord","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":"0.7","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":"1.25","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","Mounting Position":"standing, on horizontal 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","Design Of The Surge Suppressor":"with varistor","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"11 W","holding power of magnet coil at DC":"4 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","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","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=473382&mlfb=3RH1122-2KV40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KV40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between this 3RH1122 and the 3RT1015 contactor series?","answer":"The 3RH1122-2KV40-1AA0 is a dedicated auxiliary contactor (pilot duty) with 2 NO + 2 NC contacts, while the 3RT1015 series are main power contactors for switching motor loads. The 3RT1015-1BB42, for example, is a 3-pole power contactor with a different coil voltage and no built-in auxiliary contacts — it requires a separate 3RH1 auxiliary contact block if you need extra signal contacts. They share the same S00 frame size and DIN-rail mounting, so they can sit side by side in a panel, but they are not drop-in replacements for each other."},{"question":"What compliance documentation is available for this part?","answer":"The substance prohibitance date of 07/01/2006 indicates RoHS compliance. The part carries a surge voltage resistance of 6 kV and pollution degree 3 rating, which are IEC 60947-1 parameters. For specific declarations (REACH, UL, CE), request the manufacturer's compliance documentation with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2KV40-1AA0","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/3RH1122-2KV40-1AA0 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}}