{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1KG40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1KG40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1122-1KG40-0LA2, 45 mm width, 10 A at 24 V rated value, IP20 front, screw and snap-on mounting.","salesMarkdown":"## Auxiliary contactor for control-circuit switching It carries a 10 A rated value at 24 V, with the contact reliability spec of one incorrect switching operation per 100 million cycles at 17 V, 1 mA — meaning it's built for high-integrity signal paths, not just power switching. The coil draws 11 W on closing and holds at 4 W, so the thermal load on the control transformer is modest. At 45 mm wide, 57.5 mm tall, and 72 mm deep, this contactor fits the standard S00 footprint and mounts via screw or snap-on onto a DIN rail. The IP20 front protection means it's suitable for enclosed panels where personnel don't contact live parts. ## Switching ratings across voltages The rated switching current drops with 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. The 125 V rated value appears as a separate spec line — likely the rated insulation voltage or a reference point for the contact block. The 6 kV surge voltage resistance (impulse withstand) aligns with pollution degree 3 environments, typical for industrial control panels without climate control. ## Mechanical endurance and environmental range Rated for 30 million mechanical switching operations, with shock resistance of 10g at 5 ms and 5g at 10 ms. The solid conductor terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² — covering most control-wiring gauges used in panel building.","metaTitle":"Siemens 3RH1122-1KG40-0LA2 SIRIUS Auxiliary Contactor, 45 mm","metaDescription":"Siemens SIRIUS 3RH1122-1KG40-0LA2 auxiliary contactor, size S00, 45 mm width, 10 A at 24 V rated value, IP20 front, screw and snap-on mounting. Active lifecycle, available to order","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=106271&mlfb=3RH1122-1KG40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KG40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH1122-1KG40-0LA2?","answer":"The depth is 72 mm, with a width of 45 mm and height of 57.5 mm — the standard S00 footprint for DIN-rail mounting."},{"question":"What conductor sizes does the terminal accept?","answer":"The solid terminal accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² — covering common control wiring gauges."},{"question":"What compliance documentation does Siemens provide for this part?","answer":"RoHS compliance is confirmed with a substance prohibition date of July 1, 2006. The part carries IP20 front protection and pollution degree 3 rating, with 6 kV surge voltage resistance."},{"question":"Will 3RH1122-1KG40-0LA2 drop into a panel specified for 3RH2122-1BW40?","answer":"The 3RH1122 series is size S00 with a 45 mm width, while the 3RH2122 series is size S0 with a 45 mm width — same width but different depth and mounting rail spacing. Physical fit is not guaranteed without checking the panel layout against the S00 vs S0 footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1KG40-0LA2","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/3RH1122-1KG40-0LA2 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}}