{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1KE40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1KE40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1KE40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KE40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH1122-1KE40, for switching auxiliary circuits, 60 V rated value, 10 A at 24 V, 6 kV surge voltage resistance, IP20, screw and snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RH1122-1KE40 is a coupling relay built for switching auxiliary circuits in control panels. Rated at 60 V with a 10 A switching capacity at 24 V, it handles the auxiliary loads common in motor starter and PLC output isolation circuits. The 6 kV surge voltage resistance means it can sit on the same rail as contactors without coupling noise back into the control logic. At higher voltages the current drops: 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 AC-15 / DC-13 style derating curves you need when sizing for mixed-voltage control circuits. The typical mechanical life is 30,000,000 operations. The built-in varistor surge suppressor (design of the surge suppressor: with varistor) clamps coil transients at source, so you don't need an external flyback diode or RC snubber on the relay coil. Coil closing and holding power is a steady 2.3 W DC. Shock resistance is 10g at 5 ms and 5g at 10 ms — adequate for machine-mounted panels but not for direct hammer-mill attachment without isolation. The screw terminals accept solid conductors from 0.5 mm² up to 4 mm² (2x 0.5...1.5 mm², 2x 0.75...2.5 mm², 2x 4 mm²).","metaTitle":"Siemens 3RH1122-1KE40 SIRIUS Coupling Relay, 10 A at 24 V","metaDescription":"Siemens SIRIUS 3RH1122-1KE40 coupling relay for auxiliary circuits. 60 V rated, 10 A at 24 V, 6 kV surge. IP20 front, screw/snap-on mount. Current production. RFQ.","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":"60 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °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":"Coupling relay for switching auxiliary circuits","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":"No","closing power of magnet coil at DC":"2.3 W","holding power of magnet coil at DC":"2.3 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":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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","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=109816&mlfb=3RH1122-1KE40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1KE40/alternatives.json"},"ai":{"faq":[{"question":"Does the 3RH1122-1KE40 include built-in surge suppression?","answer":"Yes, the surge suppressor design is with varistor, so coil transients are clamped internally without needing an external snubber."},{"question":"What wire sizes does the terminal accept?","answer":"The screw terminals accept solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), and 2x 4 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1KE40","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/3RH1122-1KE40 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}}