{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1KG40-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1KG40-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 2 NO + 2 NC, size S00, 45 mm width, 72 mm depth, screw and snap-on mounting, varistor surge suppression, IP20 front.","salesMarkdown":"The front face is IP20 rated, suitable for enclosed control panels where accidental finger contact is prevented. ## Contact ratings and switching capacity Rated at 125 V with an initial value of 0.7 and full-scale of 1.25, the contactor's thermal current at 24 V is 10 A, dropping to 1 A at 110 V, 0.27 A at 220 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These values reflect the AC-1 resistive load curve; the 10 A at 24 V covers the common control-circuit voltage in many panels, while the 1 A at 690 V is the ceiling for higher-voltage auxiliary circuits. The varistor surge suppressor is built in, clamping voltage transients from inductive loads like contactor coils or solenoid valves. ## Mechanical endurance and environmental limits Shock resistance is 10g / 5 ms and 5g / 10 ms, and the operating temperature range is -40 to +70 °C, storage and transport -55 to +80 °C. Solid conductors accepted: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², and 2x 4 mm². The screw terminals accept ferruled or solid wire; the spring-cage variant is not this order code. Coil closing power is 11 W DC, holding power 4 W DC — the holding power is roughly one-third of the inrush, so the coil driver must handle the peak but the steady-state load is light. The part complies with RoHS substance prohibitions dated July 1, 2006. The SIRIUS brand is Siemens' modular contactor and control gear family, widely used in panel building and machine control. The auxiliary switch extension is possible, allowing field addition of extra contact blocks without removing the base unit.","metaTitle":"Siemens 3RH1122-1KG40-0LA0 SIRIUS Auxiliary Contactor, 2 NO","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1122-1KG40-0LA0, 2 NO + 2 NC contacts, size S00, 45 mm wide, 72 mm deep, IP20 front, varistor suppression, screw/snap-on mount, current produc","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","Rated Value":"125 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-40 ... +70 °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":"+/-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","Design Of The Surge Suppressor":"with varistor","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","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 (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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":"70 %","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"21 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":"screw-type 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=283431&mlfb=3RH1122-1KG40-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key contact ratings for 3RH1122-1KG40-0LA0?","answer":"It has 2 NO + 2 NC instantaneous contacts rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. The varistor surge suppressor is built in."},{"question":"What is the depth of 3RH1122-1KG40-0LA0?","answer":"The depth is 72 mm. Width is 45 mm, height 57.5 mm."},{"question":"What solid conductor sizes does 3RH1122-1KG40-0LA0 accept?","answer":"It accepts 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², and 2x 4 mm² solid conductors."},{"question":"Does 3RH1122-1KG40-0LA0 have a built-in surge suppressor?","answer":"Yes, the design of the surge suppressor is with a varistor. No external suppressor module is required for basic coil transient suppression."},{"question":"Where can I buy 3RH1122-1KG40-0LA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA0","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/3RH1122-1KG40-0LA0 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}}