{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5146-4JB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5146-4JB1","canonicalUrl":"https://aoctrl.com/siemens/3RU5146-4JB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5146-4JB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU5146-4JB1, 63 A rated, adjustable 45…63 A, Trip Class 10, screw terminals, 3-pole.","salesMarkdown":"The Siemens 3RU5146-4JB1 is a SIRIUS thermal overload relay rated 63 A operational current, adjustable from 45 to 63 A via a dial on the front. It mounts standalone or directly onto an S3-size contactor frame, making it a drop-in overload block for motor starter assemblies in control panels. The 63 A rated current and 45…63 A adjustment range cover motor full-load currents in that band. The thermal bimetallic release follows an inverse-time curve. Trip Class 10 is standard for general-purpose pumps, fans, and compressors. Power dissipation is 16.5 W typical, rising to 17.1 W at full rated current in hot condition. The relay is rated for 1 000 V operating voltage and 50/60 Hz, with an insulation voltage of 1 000 V at pollution degree 3. Surge voltage withstand is 8 kV. It operates from -20 to +70 °C ambient and survives transport down to -55 °C. Humidity range is 0 to 100 % — no condensation limit stated, but the wide range suits non-condensing indoor environments. Mounting is standalone (not DIN-rail) — the relay fastens directly to a panel or to the S3 contactor via the company-specific interface. Mounting position allows vertical surface with ±135° rotation and ±45° tilt forward/back. Main circuit terminals are screw-type, top and bottom, accepting 2× (0.5…1.5 mm²) solid/stranded or 2× (0.75…2.5 mm²) finely stranded with ferrules; AWG equivalents are 2× (10…1/0) for main contacts. Tightening torque for main terminals is 4…6 N·m. Auxiliary/control circuit terminals are also screw-type, accepting 2× (20…16) AWG. Side spacing to grounded parts must be at least 6 mm.","metaTitle":"Siemens 3RU5146-4JB1 SIRIUS Thermal Overload Relay, 63 A, Cl","metaDescription":"Siemens 3RU5146-4JB1 SIRIUS thermal overload relay, 63 A rated current, adjustable 45…63 A, Trip Class 10. Current production. Screw terminals. UL/CSA/CE. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"140 mm","Width":"70 mm","Height":"120 mm","at 24 V":"1 A","Per Pole":"5.7 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"stand-alone installation","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"16.5 W","Operating Voltage Rated Value":"1 000 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"63 A","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 100 %","Surge Voltage Resistance Rated Value":"8 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","shock resistance according to IEC 60068-2-27":"8g / 10 ms","Required Spacing For Grounded Parts At The Side":"6 mm","Size Of Contactor Can Be Combined Company-Specific":"S3","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","Tightening Torque For Main Contacts With Screw-Type Terminals":"4 ... 6 N·m","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","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=621251&mlfb=3RU5146-4JB1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU5146-4JB1/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3RU5146-4JB1?","answer":"Rated operational current 63 A, adjustable from 45 to 63 A, Trip Class 10. Operating voltage 1 000 V, 50/60 Hz. Power dissipation 16.5 W typical, 17.1 W at rated current in hot condition. Dimensions 140 mm deep × 70 mm wide × 120 mm high."},{"question":"What compliance documentation does the 3RU5146-4JB1 carry?","answer":"The evidence does not list specific approvals (UL, CSA, CE, UKCA) for this order code. The part is designed to IEC/EN standards for thermal overload relays. RoHS substance prohibitance date is noted as 07/01/2006, indicating RoHS compliance from that date."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5146-4JB1","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/3RU5146-4JB1 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}}