{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1146-4FB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1146-4FB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RU1146-4FB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4FB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, Size S3, Trip Class 10, screw-type terminals, 3RU1146-4FB0-ZX95.","salesMarkdown":"The 3RU1146-4FB0-ZX95: The relay measures 70 mm wide by 120 mm high by 140 mm deep. It mounts on a vertical surface with ±135° rotatability and ±45° tilt to front and back. Clearance requirements: 0 mm upwards, forwards, and backwards; 6 mm at the sides. This zero-clearance design on three sides simplifies panel layout when ganging multiple overloads next to each other. Main circuit terminals accept screw-type connections: stranded wire from 2x (10 to 50 mm²) or single 10 to 70 mm², with AWG equivalents of 2x (10 to 1/0) or 1x (10 to 2/0). Auxiliary and control circuit terminals take solid wire 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), and AWG 2x (20 to 16) or 2x (18 to 14). This range covers most motor circuit wiring from fractional-horsepower up to moderate industrial loads. ## Environmental and Protection Ratings It withstands 100% relative humidity during operation and shock loads of 8g for 10 ms. The relay carries ATEX approval DMT 98 ATEX G 001, allowing use in potentially explosive atmospheres when properly integrated. ## Coordination and Protection Data With type of coordination 1, the relay requires a gG fuse rated 160 A upstream. For type of coordination 2, the requirement drops to 80 A gG. Power dissipation per pole is 4.5 W. These figures matter when sizing upstream protection and calculating panel thermal load. Auxiliary contacts carry 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. For DC control circuits, ratings are 0.22 A at 110 V, 0.22 A at 125 V, and 0.11 A at 220 V. These values define the signal switching capability for PLC inputs or indicator lamps in the control circuit.","metaTitle":"Siemens 3RU1146-4FB0-ZX95 SIRIUS Thermal Overload Relay, Siz","metaDescription":"Siemens 3RU1146-4FB0-ZX95 SIRIUS thermal overload relay, Size S3, Trip Class 10. Depth 140 mm. 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":"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":"4.5 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: 80 A","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 160 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":"13.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"28 ... 40 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=456599&mlfb=3RU1146-4FB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4FB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RU1146-4FB0-ZX95 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing at the time of your order."},{"question":"What is the depth of 3RU1146-4FB0-ZX95?","answer":"The listed depth is 140 mm, with zero clearance required forwards, backwards, and upwards, and 6 mm clearance at the sides."},{"question":"What wire sizes does the 3RU1146-4FB0-ZX95 accept?","answer":"Main circuit terminals accept stranded wire 2x (10 to 50 mm²) or single 10 to 70 mm². Auxiliary terminals accept solid wire 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²)."},{"question":"What compliance documentation does 3RU1146-4FB0-ZX95 carry?","answer":"The relay carries ATEX approval DMT 98 ATEX G 001 for explosive atmospheres, IP20 front protection, and RoHS compliance dated July 1, 2006. Surge voltage resistance is rated at 8 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1146-4FB0-ZX95","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/3RU1146-4FB0-ZX95 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}}