{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4JB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4JB1","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4JB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4JB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU2146-4JB1, S3 frame, Class 10, 690 V rated, 30–55 kW motor range, screw terminals.","salesMarkdown":"Rated voltage is 690 V, with motor power ratings of 30 kW at 400 V, 37 kW at 500 V, and 55 kW at 690 V, and current ratings of 52 A at 480 V and 62 A at 600 V. The relay includes a \"Tripped\" message indicator for quick fault diagnosis on the panel door or enclosure. Mounts stand-alone in any position — no DIN rail required, though it can be panel-mounted directly. Main circuit connections use screw-type terminals accepting solid conductors 2×(2.5…16 mm²) and stranded 2×(6…16 mm²), 2×(10…50 mm²), or 1×(10…70 mm²). Auxiliary control terminals accept 2×(0.5…1.5 mm²) solid or 2×(0.75…2.5 mm²) stranded. The main contact screw requires an M8 hexagon socket, 4 mm tip. Dimensions: 70 mm wide, 120 mm high, 140 mm deep — fits standard S3 panel cutouts. ## Auxiliary contact ratings and ambient conditions The built-in auxiliary contacts (typically N/O + N/C for trip and signal) carry rated 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. Lower-voltage DC ratings: 0.3 A at 60 V, 0.22 A at 110/125 V, 0.11 A at 220 V. Operating ambient temperature range is -40…+70 °C, with temperature compensation active from -40…+60 °C — meaning the thermal curve stays accurate across the working range without manual adjustment. Storage and transport range is -55…+80 °C. Power dissipation per pole is 5.7 W.","metaTitle":"Siemens 3RU2146-4JB1 SIRIUS thermal overload relay, S3, Clas","metaDescription":"Siemens 3RU2146-4JB1 SIRIUS thermal overload relay, S3 frame, Class 10 trip, 690 V rated, 30–55 kW motor range. Current lifecycle. Available 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":"140 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","Height":"120 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","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"stand-alone installation","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630104&mlfb=3RU2146-4JB1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4JB1/alternatives.json"},"ai":{"faq":[{"question":"What does the 'Tripped' message on 3RU2146-4JB1 indicate?","answer":"The relay carries a 'Tripped' message indicator that visually signals when the thermal overload has operated, allowing a maintenance technician to quickly identify which motor circuit tripped without opening the panel."},{"question":"What are the motor power ratings for 3RU2146-4JB1?","answer":"The relay is rated for 30 kW at 400 V, 37 kW at 500 V, and 55 kW at 690 V, with corresponding current ratings of 52 A at 480 V and 62 A at 600 V."},{"question":"Where can I buy 3RU2146-4JB1 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window."},{"question":"What compliance documentation does Siemens provide for 3RU2146-4JB1?","answer":"The relay carries a substance prohibitance date of 03/01/2017, confirming RoHS compliance. It is designed to IEC/EN 60947-4-1 for motor protection and carries the SIRIUS brand."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4JB1","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/3RU2146-4JB1 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}}