{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2LJ80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2LJ80","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2LJ80","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2LJ80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, size S00, 3RH2122-2LJ80, 2 N/O contacts, 24 VDC coil with varistor, 10 A rated switching capacity, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RH2122-2LJ80 is a SIRIUS coupling relay for switching auxiliary circuits, sized S00. It carries two N/O instantaneous contacts and a 24 VDC coil with an integrated varistor surge suppressor. Rated switching capacity is 10 A at 24 V, derating to 4.7 A at 60 V, 3 A at 110 V, and 1.2 A at 220 V. At 230 V it handles 10 A (likely resistive), then drops to 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. These are the contact ratings across the voltage range — match your load voltage to the right row. ## Mounting and spacing Dimensions are 73 mm deep, 45 mm wide, 70 mm high. Pollution degree 3. Relative humidity minimum 10%. RoHS compliance date (substance prohibition) is October 1, 2009. The coil closing power at DC is 2.8 W.","metaTitle":"Siemens 3RH2122-2LJ80 SIRIUS Coupling Relay, 2 N/O, 24 VDC,","metaDescription":"Siemens 3RH2122-2LJ80 SIRIUS coupling relay, size S00, 2 N/O contacts, 24 VDC coil with varistor. 10 A rated at 24 V. Screw and snap-on 35 mm DIN rail. Current production. Quoted t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 20 ms","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"72 V","Initial Value":"0.7","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","Full-Scale Value":"1.25","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 ... 4 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"10 A","at 60 V rated value":"4.7 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 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"2","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"with varistor","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","at AWG cables for auxiliary contacts":"2x (20 ... 12)","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":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","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","contact rating of auxiliary contacts according to UL":"A600 / Q600","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":"spring-loaded 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a1138cf6cb271423f8db4ea9be2c2204.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=375347&mlfb=3RH2122-2LJ80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2LJ80/alternatives.json"},"ai":{"faq":[{"question":"What are the mounting dimensions for 3RH2122-2LJ80?","answer":"73 mm deep, 45 mm wide, 70 mm high. Requires 10 mm clearance upward/forward/downward and 6 mm at the side."},{"question":"Does 3RH2122-2LJ80 have a varistor?","answer":"Yes, the surge suppressor design is with varistor, integrated into the relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2LJ80","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/3RH2122-2LJ80 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}}