{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1126-1JD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1126-1JD1","canonicalUrl":"https://aoctrl.com/siemens/3RU1126-1JD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1JD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU1126-1JD1 thermal overload relay, Class 10, size S0, screw terminals, 690 V max, IP20 front, ATEX approved.","salesMarkdown":"Size S0 frame, so it mates with S0 contactors in the SIRIUS family. Rated for main circuit voltages up to 690 V AC-3, with screw-type terminals accepting 1x (16…12) or 1x (14…8) AWG for the power connections. The auxiliary contact block is separate — this relay ships with zero auxiliary contacts built in, so you add a block if you need a signal back to the PLC. Trip class 10 is the key selection parameter: it means the relay will not nuisance-trip on normal motor inrush (which typically decays in a few seconds) but will protect the motor winding from sustained overload. If your motor starts against a heavy load or has a long acceleration time (centrifuge, crusher), you may need Class 20 or 30 — this is not that relay. The S0 frame size dictates the physical envelope: 45 mm wide, 97 mm tall, 96 mm deep. That 96 mm depth is the dimension you need to clear inside the enclosure — it projects forward from the mounting surface. Stand-alone installation, mountable on a vertical surface with ±135° rotation and ±45° tilt front/back, so panel layout is flexible. Power dissipation is 6.6 W total at hot operating state (2.2 W per pole). Surge voltage resistance rated at 6 kV, which aligns with IEC 60947-1 overvoltage category III for industrial control panels. Thermal overload relays of this class are the standard motor protection component in motor control centers (MCCs) and individual starter enclosures. They protect three-phase induction motors in conveyors, pumps, fans, compressors, and machine tools. The ATEX approval (DMT 98 ATEX G 001) means it can be used in potentially explosive atmospheres — typically Zone 2 gas or Zone 22 dust, when paired with an appropriate contactor and enclosure. The 100 % relative humidity rating means it can operate in condensing environments (e.g., unheated warehouses, washdown areas if the enclosure is rated), though the IP20 front limits where it can be mounted exposed. If you are sourcing for a new design, the S0 frame and Class 10 curve are widely used, so supply depth is good. Submit an RFQ for current pricing and lead time.","metaTitle":"Siemens 3RU1126-1JD1 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens 3RU1126-1JD1 SIRIUS thermal overload relay, Class 10 trip, S0 size, 690 V max, ATEX approved. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"96 mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","Maximum":"2 000 m","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","at 110 V":"0.22 A","at 120 V":"3 A","at 125 V":"0.22 A","at 220 V":"0.11 A","at 230 V":"2 A","at 400 V":"1 A","Backwards":"0 mm","Downwards":"0 mm","Trip class":"CLASS 10","At The Side":"6 mm","On The Front":"IP20","Mounting type":"stand-alone installation","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Shock resistance":"8g / 10 ms","Mounting position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Product brand name":"SIRIUS","Type of protection":"DMT 98 ATEX G 001","Product designation":"thermal overload relay","For Auxiliary Contacts":"0","Size of overload relay":"S0","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"6.6 W","Relative humidity during operation":"100 %","at AWG conductors for main contacts":"1x (16 ... 12), 1x (14 ... 8)","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"F","at AC in hot operating state per pole":"2.2 W","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 14)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","Number of NC contacts for auxiliary contacts":"1","Number of NO contacts for auxiliary contacts":"1","Size of contactor can be combined company-specific":"S0","Removable Terminal For Auxiliary And Control Circuit":"No","Insulation voltage with degree of pollution 3 rated value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","Adjustable pick-up value current of the current-dependent overload release":"7 ... 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=41857&mlfb=3RU1126-1JD1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1126-1JD1/alternatives.json"},"ai":{"faq":[{"question":"What are the key physical dimensions for panel layout?","answer":"Width is 45 mm, height 97 mm, depth 96 mm. The 96 mm depth is the projection from the mounting surface — critical for enclosure depth clearance. Mounting position allows ±135° rotation and ±45° tilt on a vertical surface."},{"question":"What approvals does this relay carry?","answer":"It carries ATEX approval DMT 98 ATEX G 001 for use in potentially explosive atmospheres. The front face is IP20 rated. Surge voltage resistance is 6 kV, consistent with industrial control panel overvoltage category III."},{"question":"What wire sizes does the screw terminal accept?","answer":"For the main current circuit, it accepts 1x (16…12) or 1x (14…8) AWG. For auxiliary/control circuits, solid conductors 2x (0.5…2.5 mm²) and finely stranded with ferrule 2x (0.5…1.5 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1126-1JD1","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/3RU1126-1JD1 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}}