{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-2JB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-2JB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-2JB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2JB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay 3RH1122-2JB40, size S00, 24 V DC coil, 2 NO + 0 NC contacts, screw/snap-on mounting, IP20 front, with diode surge suppression.","salesMarkdown":"Siemens 3RH1122-2JB40 is a SIRIUS coupling relay — a compact auxiliary contactor built for switching control and signal circuits in industrial panels. Size S00 frame, 45 mm wide, snaps onto DIN rail or screws directly to a mounting plate. Coil is 24 V DC, pull-in and hold at 2.3 W. Rated AC-12 at 10 A, so it handles resistive loads like contactor coils and indicator lamps without derating. Surge suppressor built in — a free-wheeling diode across the coil, which means no external snubber needed on DC control circuits. The 10 A AC-12 rating is the continuous thermal current — it governs the contact set's ability to carry resistive loads without welding. For inductive loads (contactors, solenoids), the AC-15 rating drops to 6 A at 230 V. The DC switching capability is lower: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V. If you're breaking DC solenoids or brake coils, check the voltage against those curves. The 2 NO + 0 NC contact configuration means this relay makes two independent normally-open circuits; there's no break contact on board. Snaps onto DIN rail or screws to a backplate. Side clearances: zero mm.","metaTitle":"Siemens 3RH1122-2JB40 SIRIUS Coupling Relay, 24 V DC, 10 A A","metaDescription":"Siemens 3RH1122-2JB40 SIRIUS coupling relay for switching auxiliary circuits. 24 V DC coil, 10 A AC-12 rated. Current 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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"No","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","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","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","Design of the surge suppressor":"with diode","Closing power of magnet coil at DC":"2.3 W","Holding power of magnet coil at DC":"2.3 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","Number of NC contacts for auxiliary contacts":"2","Number of NO contacts for auxiliary contacts":"2","with degree of pollution 3 at AC rated value":"690 V","Type of voltage of the control supply voltage":"DC","Identification number and letter for switching elements":"22 E","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=181594&mlfb=3RH1122-2JB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-2JB40/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1122-2JB40 used for?","answer":"It's a coupling relay for switching auxiliary circuits — typically used to interface a PLC or controller output to a higher-current contactor coil, or to multiply contact signals in a control panel."},{"question":"What is 3RH1122-2JB40's depth?","answer":"73 mm deep."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-2JB40","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/3RH1122-2JB40 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}}