{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1JB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1JB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1JB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1JB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH1122-1JB40, 24 V DC coil, 10 A AC-12, 2 NO contacts, size S00, screw and snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RH1122-1JB40 is a coupling relay designed for switching auxiliary circuits in control panels. It carries a 24 V DC coil with a closing and holding power of 2.3 W, and is rated for 10 A at 24 V in AC-12 duty, meaning it handles resistive and lightly inductive loads in control circuits. Two instantaneous NO contacts give you the basic switching paths for interlocking, signaling, or pilot duty. This relay mounts via screw or snap-on onto a DIN rail, fitting the standard S00 contactor footprint — 45 mm wide, 57.5 mm high, 72 mm deep. Zero side clearance is required, so you can pack it tight against adjacent devices without derating. For higher voltages, the current derates: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. The coil's 2.3 W holding power is low enough to keep heat down in a sealed panel. The built-in surge suppressor with a diode protects the coil driver from flyback voltage — essential when the relay is driven by a PLC output or solid-state switch. Shock resistance of 10g for 5 ms and 5g for 10 ms covers most vibration in industrial machinery. The screw terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm². This covers standard control wiring from signal-level up to 4 mm² for short power runs. The IP20 rating on the front means finger-safe when installed in a closed panel, but not protected against moisture — keep it dry.","metaTitle":"Siemens SIRIUS 3RH1122-1JB40 Coupling Relay, 24 V DC, 10 A","metaDescription":"Siemens SIRIUS 3RH1122-1JB40 coupling relay for switching auxiliary circuits. 24 V DC coil, 10 A AC-12 rating, 2 instantaneous contacts. Size S00, snap-on mounting. Current product","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","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=375803&mlfb=3RH1122-1JB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1JB40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3RH1122-1JB40?","answer":"The key ratings are: 24 V DC coil with 2.3 W closing/holding power, 10 A AC-12 at 24 V, 2 instantaneous NO contacts, size S00 footprint (45 x 57.5 x 72 mm), IP20 front, operating temperature -25 to +60 °C, and pollution degree 3."},{"question":"What is the depth of the 3RH1122-1JB40?","answer":"The depth is 72 mm."},{"question":"What wire sizes does the 3RH1122-1JB40 accept?","answer":"The screw terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm²."},{"question":"Does the 3RH1122-1JB40 have a built-in surge suppressor?","answer":"Yes, it includes a surge suppressor with a diode, which protects the coil driver from flyback voltage when switching inductive loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1JB40","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/3RH1122-1JB40 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}}