{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1KM40-0LA4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1KM40-0LA4","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1KM40-0LA4","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KM40-0LA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, order code 3RH1122-1KM40-0LA4, size S00, 10 A AC-12 rated, 4 NO + 2 NC contacts, 24 VDC coil with integrated varistor, screw and snap-on mounting, 72 mm depth.","salesMarkdown":"It carries 4 normally-open and 2 normally-closed instantaneous contacts, plus a built-in varistor surge suppressor across the coil. Rated 10 A in AC-12 duty (resistive loads at up to 690 V), it handles the control-circuit currents typical of PLC outputs, relay coils, and indicator lamps. The 24 VDC coil draws 11 W on pickup and holds at 4 W. Depth is 72 mm, which matters for shallow enclosures where a deeper contactor would crowd the door or busbar. That helps when panel layout forces an odd angle. Wire terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid — covers most control-circuit conductors without needing ferrules. Shock resistance is 10g at 5 ms and 5g at 10 ms — enough for most machine-mounted panels but not for extreme vibration near presses or crushers. This is a standard SIRIUS auxiliary contactor — a fast mover in panel-building and MRO.","metaTitle":"Siemens 3RH1122-1KM40-0LA4 SIRIUS Auxiliary Contactor, Size","metaDescription":"Siemens 3RH1122-1KM40-0LA4 SIRIUS auxiliary contactor, size S00, 10 A AC-12 rated, 4 NO + 2 NC contacts, 24 VDC coil with varistor, screw/snap-on mount, 72 mm depth. Current lifecy","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":"220 V","On The Front":"IP20","Initial Value":"0.7","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","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","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","Design of the surge suppressor":"with varistor","Closing power of magnet coil at DC":"11 W","Holding power of magnet coil at DC":"4 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":"70 %","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":"1","Number of NO contacts for auxiliary contacts":"2","with degree of pollution 3 at AC rated value":"690 V","Type of voltage of the control supply voltage":"DC","Identification number and letter for switching elements":"21 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=459382&mlfb=3RH1122-1KM40-0LA4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KM40-0LA4/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH1122-1KM40-0LA4?","answer":"The depth is 72 mm, which fits standard S00-size enclosures without crowding the door."},{"question":"What wire sizes does 3RH1122-1KM40-0LA4 accept?","answer":"The terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid conductors."},{"question":"Will 3RH1122-1KM40-0LA4 drop into a panel built for 3RH2122-1BW40?","answer":"Both are S00-size auxiliary contactors with the same 45 mm width and screw/snap-on mount, so the physical fit is the same. The 3RH2122-1BW40 has a different contact configuration and coil voltage — verify those match your circuit before swapping."},{"question":"How do I get pricing and availability for 3RH1122-1KM40-0LA4?","answer":"Submit an RFQ through the storefront. The part is sourced to order through independent distribution; current pricing and stock are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for this contactor?","answer":"As a SIRIUS component, it carries CE marking for the European market and is designed to meet IEC/EN 60947 standards. Specific RoHS/REACH declarations are available from Siemens on request — the part includes a varistor, so check the material declaration if RoHS compliance for the suppressor is critical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1KM40-0LA4","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/3RH1122-1KM40-0LA4 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}}