{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1KG40-0LA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1KG40-0LA3","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 2 NO + 2 NC, 125 V DC coil, screw and snap-on mounting, IP20, 45 x 57.5 x 72 mm.","salesMarkdown":"It carries 2 normally-open and 2 normally-closed instantaneous contacts, rated for a 125 V DC coil. The front face is IP20 rated, so it suits enclosed panel environments where finger-safe access is needed. ## Switching capacity and contact ratings The contacts are rated for switching at multiple voltage levels: 10 A at 24 V, 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 are the thermal current values for the auxiliary contacts — use them to size the control circuit load, not the main power path. The contactor includes a built-in varistor surge suppressor across the coil, which limits voltage spikes when the coil de-energises. Coil closing power is 11 W DC; holding power drops to 4 W DC, so the coil driver must supply the inrush but can settle to a lower continuous draw. The unit withstands shock of 10 g for 5 ms and 5 g for 10 ms. The mechanical endurance is 30 million operating cycles. ## Wiring and connection data The terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The screw-type clamping is standard for panel wiring; strip length and torque follow the manufacturer's installation instructions. The auxiliary switch block is field-expandable — the product extension auxiliary switch is listed as yes, so additional contact blocks can be added to the side of the base unit without removing wiring.","metaTitle":"Siemens SIRIUS 3RH1122-1KG40-0LA3 Auxiliary Contactor, 2 NO","metaDescription":"Siemens SIRIUS 3RH1122-1KG40-0LA3 auxiliary contactor, size S00. 2 NO + 2 NC contacts, 125 V DC coil. Screw and snap-on mounting, IP20. Rated surge voltage 6 kV. Current production","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=287816&mlfb=3RH1122-1KG40-0LA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA3/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this brand provide for 3RH1122-1KG40-0LA3?","answer":"The part carries a RoHS compliance date of July 1, 2006, indicating it meets the RoHS directive. The brand, Siemens, typically provides CE, UL, CSA, and IEC declarations for the SIRIUS series; specific certificates are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA3","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/3RH1122-1KG40-0LA3 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}}