{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2KJ80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2KJ80","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2KJ80","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KJ80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay 3RH1122-2KJ80, size S00, 72 V DC coil with varistor, 2 N/O + 0 N/C contacts, screw and snap-on mounting, IP20 front.","salesMarkdown":"The Siemens 3RH1122-2KJ80 is a SIRIUS coupling relay — a size S00 auxiliary contactor designed for switching auxiliary circuits in control panels. It carries 2 normally-open instantaneous contacts and no normally-closed or delayed contacts, so it's a straight-forward on/off signal repeater. That means no external flyback diode needed — the varistor clamps the inductive kick when the coil de-energizes, which simplifies panel wiring and protects nearby electronics. Rated switching currents are specified by 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. These are the maximum continuous currents the contacts can make and break under AC loads — match them against your auxiliary circuit's draw, not the main motor current. Contact reliability is rated at one incorrect switching operation per 100 million cycles at 17 V, 1 mA. That's a dry-circuit spec — important if this relay is switching low-level signals like PLC inputs or sensor feedback where oxide films on standard contacts can cause intermittent failures. This means the relay is suited for industrial environments where transient spikes and airborne contaminants are normal — typical for motor control centers and production line panels. The size S00 footprint — 45 mm wide, 60 mm tall, 73 mm deep — fits the standard S00 contactor slot in a Siemens SIRIUS panel layout. Terminals accept solid conductors from 0.25 to 2.5 mm² (2x per clamp). RoHS compliance date is July 1, 2006, covering the standard EU substance restrictions. No separate UL or CSA listing appears in the spec record, but the SIRIUS family typically carries those approvals — verify against your local panel certification requirements.","metaTitle":"Siemens 3RH1122-2KJ80 SIRIUS Coupling Relay, 72 V, 10 A","metaDescription":"Siemens SIRIUS coupling relay 3RH1122-2KJ80, size S00, 72 V rated coil, 10 A at 24 V, IP20 front, snap-on mounting. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Rated Value":"72 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 (24 ... 14)","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 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 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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":"Cage Clamp 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=311321&mlfb=3RH1122-2KJ80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2KJ80/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The coil is 72 V DC, 2.3 W. Contact ratings vary by 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. It has 2 N/O contacts, no N/C or delayed contacts. Surge resistance is 6 kV, pollution degree 3."},{"question":"What is the physical size and mounting?","answer":"Size S00: 45 mm wide, 60 mm tall, 73 mm deep. Mounts on DIN rail via screw or snap-on. Terminals accept 0.25 to 2.5 mm² solid conductors. IP20 front protection."},{"question":"Does it have surge suppression built in?","answer":"Yes, it includes a varistor surge suppressor across the coil. No external flyback diode is required for inductive kick suppression."},{"question":"What compliance documentation is available?","answer":"RoHS compliance is dated July 1, 2006. The SIRIUS family typically carries UL/CSA approvals, but those are not explicitly listed in this spec record — confirm with your local Siemens documentation for your specific certification needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2KJ80","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/3RH1122-2KJ80 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}}