{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2KB40-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2KB40-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2KB40-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KB40-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4-pole (2 NO + 2 NC), 24 V DC coil with integrated varistor, screw and snap-on mounting, IP20 front.","salesMarkdown":"It carries a 24 V DC coil with an integrated varistor surge suppressor, and its 4-pole contact arrangement gives you 2 normally-open and 2 normally-closed auxiliary contacts. The coil draws 11 W during closing and holds at 4 W, so the control transformer sizing is straightforward — no inrush surprise. Contact ratings are given per voltage: 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. That covers most control-voltage rails you'll find in a panel. The mounting position is flexible: +/-180° rotation on a vertical surface, and can be tilted forward or backward by +/-22.5°. That matters when you're shoehorning it into a crowded panel. Terminals accept 2x (0.25 to 2.5 mm²) solid or stranded wire. Depth is 73 mm, width 45 mm, height 60 mm; it's a compact footprint that fits standard S00 contactor spacing. Operating temperature range is -40 to +70 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g / 5 ms and 5g / 10 ms. RoHS compliance dated to July 1, 2006. Contact reliability is spec'd at one incorrect switching operation per 100 million operations at 17 V, 1 mA — that's the low-energy dry-circuit performance you need for PLC inputs or signal-level switching.","metaTitle":"Siemens 3RH1122-2KB40-0LA0 SIRIUS Auxiliary Contactor, 24 VD","metaDescription":"Siemens SIRIUS 3RH1122-2KB40-0LA0 auxiliary contactor, size S00, 24 VDC coil, 4-pole with 2 NO + 2 NC contacts. IP20 front, screw and snap-on mounting. Active production. Sourced t","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":"24 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 (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":"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":"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":"$33.56","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=120207&mlfb=3RH1122-2KB40-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KB40-0LA0/alternatives.json"},"ai":{"faq":[{"question":"Will 3RH1122-2KB40-0LA0 drop into a panel built for 3RH2122-1BA40?","answer":"Both are size S00 Siemens auxiliary contactors with screw and snap-on mounting, so the footprint and DIN-rail clip are the same. The 3RH2122-1BA40 has a different coil voltage and contact arrangement — verify those against your circuit before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2KB40-0LA0","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/3RH1122-2KB40-0LA0 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}}