{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4JB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4JB0","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4JB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4JB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, thermal overload relay, 3RU2146-4JB0, CLASS 10, S3, 30 kW at 400 V, screw-type terminals, contactor mounting.","salesMarkdown":"The 3RU2146-4JB0: Mounts directly to the contactor via the M8 fastening method — no DIN-rail bracket needed, so the relay and contactor form a single unit that slides onto the rail as one assembly. Any mounting position is permitted. Main circuit connections are screw-type terminals accepting 2x (2.5…16 mm²) solid or 2x (6…16 mm²) stranded, with larger options up to 1x 70 mm² stranded. The control circuit uses 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded. ## Thermal and environmental limits The relay compensates for ambient temperature changes between -40 and +60 °C, so the trip curve stays accurate across a heated panel or cold warehouse. Power dissipation per pole is 5.7 W — factor that into panel thermal calculations when grouping multiple relays. The auxiliary contacts (the Note for message \"Tripped\" circuit) carry rated switching currents across common control voltages: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, and 0.75 A at 690 V. At lower DC control voltages the ratings are 0.3 A at 60 V, 0.22 A at 110 V and 125 V, and 0.11 A at 220 V.","metaTitle":"Siemens 3RU2146-4JB0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2146-4JB0 SIRIUS thermal overload relay, CLASS 10, S3 size, 30 kW at 400 V. Current production. Screw terminals. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"Tripped\"","Depth":"125 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RU2146-4JB0","Height":"105 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"5.7 W","Stranded":"2x (6 ... 16 mm²), 2x (10 ... 50 mm²), 1x (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","at 690 V":"0.75 A","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 45...63 A Thermal For motor protection Size S3, Class 10 Contactor mounting Main circuit: Screw Auxiliary circuit: Screw Manual-Automatic-Reset","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","For Main Contacts":"M8","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"30 kW","at 480 V rated value":"52 A","at 500 V rated value":"37 kW","at 600 V rated value":"62 A","at 690 V rated value":"55 kW","Size Of Overload Relay":"S3","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-40 ... +60 °C","Design Of Screwdriver Shaft":"Hexagonal socket","Size Of The Screwdriver Tip":"4 mm hexagon socket","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"03/01/2017","Design Of The Auxiliary Switch":"integrated","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","Between Main And Auxiliary Circuit":"440 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 125 A","Display Version For Switching Status":"Slide switch","For Main Contacts For Ring Cable Lug":"4.5 ... 6 N·m","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)","Of The Auxiliary And Control Contacts":"M3","Between Auxiliary And Auxiliary Circuit":"440 V","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","For Main Contacts With Screw-Type Terminals":"4.5 ... 6 N·m","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"8g / 11 ms","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","operational current at AC-3e at 400 V rated value":"63 A","Size Of Contactor Can Be Combined Company-Specific":"S3","Outer Diameter Of The Usable Ring Cable Lug Maximum":"19 mm","contact rating of auxiliary contacts according to UL":"B600 / R300","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 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","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"6A (SCC less than equal to 0.5 kA; U less than equal to 260V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$71.12","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e970025d1e542bc669d29c5a6b263941.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630103&mlfb=3RU2146-4JB0"},"ai":{"faq":[{"question":"What does the 'Note for message Tripped' mean on this relay?","answer":"The auxiliary contact circuit carries the tripped status indication — it closes when the overload relay has operated, so a PLC or indicator can read the fault condition."},{"question":"Where can I buy the 3RU2146-4JB0 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What are the key motor power ratings for this relay?","answer":"Rated at 30 kW at 400 V, 37 kW at 500 V, and 55 kW at 690 V. Current ratings are 52 A at 480 V and 62 A at 600 V."},{"question":"What compliance documentation is available for the 3RU2146-4JB0?","answer":"Substance prohibitance per RoHS/REACH applies from 03/01/2017."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4JB0","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/3RU2146-4JB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}