{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-2KJ80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-2KJ80","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-2KJ80","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2KJ80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, size S00, 3RH2122-2KJ80, 45 mm width, 73 mm depth, 10 A at 24 V, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens SIRIUS 3RH2122-2KJ80 is a coupling relay for switching auxiliary circuits, sized S00 (45 mm wide, 73 mm deep, 70 mm high). The built-in suppressor diode handles the DC coil's back-EMF, so you don't need an external flyback diode across the coil terminals. This relay carries 10 A at both 24 V rated value and 230 V rated value — that's the resistive load curve (AC-1 equivalent) for auxiliary contacts. At 60 V it's 4.7 A, at 110 V it's 3 A, and at 400 V it drops to 3 A. The AC switching frequency is rated at 10 000 1/h, so it keeps up with rapid-cycle applications like conveyor interlocking or valve sequencing. ## Panel integration — DIN rail and clearance The S00 footprint (45 mm wide) fits standard 45 mm-wide DIN-rail slots — one module per position. Pollution degree 3 (industrial environment). Relative humidity minimum 10%. RoHS compliance date: 10/01/2009 (substance prohibition date). The relay is rated for operation in typical control panel conditions — no special derating needed for most industrial atmospheres.","metaTitle":"Siemens 3RH2122-2KJ80 SIRIUS Coupling Relay, 45mm, 10A at 24","metaDescription":"Siemens SIRIUS 3RH2122-2KJ80 coupling relay, size S00, 45mm wide, 10A at 24V, screw and snap-on DIN rail mounting. Active lifecycle, sourced to order. Request RFQ.","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":"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":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 12)","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/ae2de57511f30e1b08ac0716684eeee1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=352912&mlfb=3RH2122-2KJ80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2122-2KJ80/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2122-2KJ80 and get a price?","answer":"We source it to order against an RFQ. Send the order code and quantity, and we'll confirm availability and current pricing at quote time — no stock count or price listed here, but we can respond quickly."},{"question":"What is the depth of 3RH2122-2KJ80?","answer":"The depth is 73 mm, with a width of 45 mm and height of 70 mm — standard S00 footprint that fits most DIN-rail panels."},{"question":"What compliance documentation does Siemens provide for 3RH2122-2KJ80?","answer":"The relay carries RoHS compliance with a substance prohibition date of 10/01/2009, and is rated for pollution degree 3 industrial environments. Standard Siemens declarations (CE, UKCA) apply per the SIRIUS series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-2KJ80","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/3RH2122-2KJ80 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}}