{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH6122-1KF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH6122-1KF40","canonicalUrl":"https://aoctrl.com/siemens/3RH6122-1KF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH6122-1KF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH6122-1KF40 coupling relay for switching auxiliary circuits, 110 V DC coil, 2 NO + 2 NC contacts, screw terminals, size S00, 45 mm width.","salesMarkdown":"The Siemens SIRIUS 3RH6122-1KF40 is a coupling relay for switching auxiliary circuits, built into the S00 contactor footprint. It carries 2 normally-open and 2 normally-closed contacts, controlled by a 110 V DC coil that draws 2.8 W for both closing and holding. The relay snaps onto a 35 mm DIN rail or screws directly to a mounting plate, and the screw-terminal connections accept up to 2x 4 mm² solid or 2x 2.5 mm² stranded wire — clean terminations in a packed enclosure. The contacts are rated for AC-12 and DC-12/DC-13 duty. At 230 V AC, the maximum operational current is 10 A; at 400 V AC it drops to 3 A, and at 690 V AC to 1 A. For DC loads at 110 V, the relay switches 3 A; at 220 V, 1.2 A. These numbers define the actual load you can break — not just carry — at each voltage. The 6 kV rated surge voltage resistance means the relay withstands line transients common in industrial panels without flashover. The 45 mm wide body fits the S00 contactor footprint, so it shares the same DIN-rail spacing and panel cutouts. The screw terminals accept 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), or 2x 4 mm² solid/stranded, and for AWG: 2x (20…16), 2x (18…14), or 2x 12.","metaTitle":"Siemens SIRIUS 3RH6122-1KF40 Coupling Relay, 110 V DC, 2 NO","metaDescription":"Siemens SIRIUS 3RH6122-1KF40 coupling relay for auxiliary circuits, 110 V DC coil, 2 NO + 2 NC contacts, rated up to 10 A at 230 V. Sourced to order against RFQ. Current lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"10 000 1/h","title":"3RH6122-1KF40","Height":"57.5 mm","Rated Value":"110 V","description":"Coupling contactor relay, DC 110 V, 0.7...1.25*US, 2 NO + 2 NC, w. integrated suppressor diode size S00, screw terminal","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"6 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 690 V rated value":"1 A","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"suppressor diode","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"2.8 W","holding power of magnet coil at DC":"2.8 W","Surge Voltage Resistance Rated Value":"6 kV","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","operational current at AC-12 maximum":"6 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","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","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","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b7791353fb838874bc25a135fca4f5b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=641372&mlfb=3RH6122-1KF40"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH6122-1KF40","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/3RH6122-1KF40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}