{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1146-4JB0-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1146-4JB0-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RU1146-4JB0-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4JB0-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, Size S3, CLASS 10, screw-type terminals, ATEX, 3RU1146-4JB0-ZW98.","salesMarkdown":"## Thermal Overload Relay, SIRIUS S3 The Siemens 3RU1146-4JB0-ZW98 is a SIRIUS thermal overload relay, Size S3, with CLASS 10 trip characteristics. Mounting is via contactor mounting (fastening method), with the relay designed to sit directly on a matching SIRIUS contactor. The relay carries ATEX protection type DMT 98 ATEX G 001, permitting use in potentially explosive atmospheres when paired with appropriate motor and installation. Front protection class is IP20, so the operator interface is touch-safe within the enclosure. ## Key Ratings and Their Meaning The relay's power dissipation is 5.7 W per pole, which must be accounted for in enclosure thermal calculations, particularly in a sealed panel with multiple relays. Short-circuit coordination is specified: with type of coordination 2, a gG fuse rated 125 A is required; with type of coordination 1, a gG fuse rated 200 A is required. This determines the upstream fuse selection for the motor branch circuit. The auxiliary contact ratings are given across multiple voltages: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. These are the switching capacities for the built-in auxiliary contacts, used for signaling the overload condition to a PLC or motor starter. The relay is rated for 100 % relative humidity during operation, confirming suitability for high-humidity environments like washdown areas or outdoor cabinets. ## Wiring and Integration Main circuit terminals accept stranded conductors: 2x (10... 50 mm²) or single 10... 70 mm². For AWG: 2x (10... 1/0) or 1x (10... 2/0). Auxiliary and control circuit terminals accept solid conductors: 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²); for AWG auxiliary: 2x (20... 16) and 2x (18... 14). All terminals are screw-type. Physical dimensions: width 70 mm, height 120 mm, depth 140 mm. This zero-clearance design allows the relay to be mounted flush against adjacent components, saving panel space. Shock resistance is rated at 8g for 10 ms, confirming the relay withstands vibration and shock typical in industrial environments with rotating machinery.","metaTitle":"Siemens 3RU1146-4JB0-ZW98 SIRIUS Thermal Overload Relay, CLA","metaDescription":"Siemens 3RU1146-4JB0-ZW98 SIRIUS thermal overload relay, Size S3, CLASS 10 trip, ATEX certified, screw terminals. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"140 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"70 mm","Height":"120 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"5.7 W","Stranded":"2x (10 ... 50 mm²), 10 ... 70 mm²","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","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","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","Size Of Overload Relay":"S3","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","With Type Of Assignment 2 Required":"gG: 125 A","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 200 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Size Of Contactor Can Be Combined Company-Specific":"S3","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","power loss [W] for rated value of the current at AC in hot operating state":"17.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"45 ... 63 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=340487&mlfb=3RU1146-4JB0-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4JB0-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What ATEX certification does this relay carry?","answer":"It carries ATEX protection type DMT 98 ATEX G 001, permitting use in potentially explosive atmospheres when correctly installed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1146-4JB0-ZW98","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/3RU1146-4JB0-ZW98 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}}