{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4LB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4LB1","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4LB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4LB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2146-4LB1 thermal overload relay, CLASS 10, S3 frame, 45 kW at 400 V, 690 V rated insulation, screw terminals.","salesMarkdown":"RoHS compliance date is March 1, 2017 — the part meets the EU substance restrictions that went into effect that year. Mounts stand-alone in any position — no orientation restrictions — with screw-type terminals on the main circuit accepting 2x (2.5…16 mm²) solid or 2x (6…16 mm²) stranded, plus larger cable up to 1x 70 mm² stranded on the load side. The auxiliary contact block uses smaller terminals: 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded, with a hexagonal socket screwdriver tip (4 mm hex) for the main terminals. Depth of 140 mm, width 70 mm, height 120 mm — fits standard S3 panel cutouts and leaves clearance for wiring ducts. The integrated auxiliary switch is rated for a range of control voltages: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, and lower currents at 60 V (0.3 A), 110 V (0.22 A), 125 V (0.22 A), and 220 V (0.11 A) — covering common PLC and relay coil loads across global control voltages.","metaTitle":"Siemens 3RU2146-4LB1 SIRIUS thermal overload relay, CLASS 10","metaDescription":"Siemens 3RU2146-4LB1 SIRIUS thermal overload relay, CLASS 10 trip, 45 kW at 400 V, S3 frame. Active production. Sourced 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","title":"3RU2146-4LB1","Height":"120 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"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","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 70...90 A Thermal For motor protection Size S3, Class 10 Stand-alone installation 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":"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":"45 kW","at 480 V rated value":"77 A","at 500 V rated value":"55 kW","at 600 V rated value":"77 A","at 690 V rated value":"75 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":"90 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: 160 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: 250 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":"90 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":"21 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"70 ... 90 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0e508aa441281694cfaf0a3e69c48eed.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630112&mlfb=3RU2146-4LB1"},"ai":{"faq":[{"question":"What does the 'for message Tripped' note mean on this component?","answer":"The note indicates the relay provides a dedicated signal contact that changes state when the overload has tripped — used to trigger an alarm or PLC input on a motor fault."},{"question":"What is the depth of the 3RU2146-4LB1?","answer":"The depth is 140 mm, with a width of 70 mm and height of 120 mm."},{"question":"What compliance documentation does Siemens provide for 3RU2146-4LB1?","answer":"RoHS compliance is confirmed with a substance prohibitance date of March 1, 2017. The part is designed to IEC/EN 60947-4-1 standards for motor protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4LB1","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/3RU2146-4LB1 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}}