{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4LD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4LD0","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4LD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4LD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 thermal overload relay, 3RU2146-4LD0, Trip Class 10, 45 kW at 400 V, 690 V rated, screw-type terminals, contactor mounting.","salesMarkdown":"The 3RU2146-4LD0: Trip Class 10 means the relay will trip within 10 seconds at 7.2× the set current — standard for standard-duty motor starting where the start-up transient is under 10 seconds. The 45 kW at 400 V rating tells you the maximum motor power this relay can protect on a 400 V three-phase supply; at 690 V it covers up to 75 kW. Temperature compensation is active from -40 to +60 °C, so the trip curve stays accurate across a wide ambient range without manual adjustment. Fastening method is contactor mounting — it snaps onto the matching SIRIUS contactor, no DIN rail needed. The main circuit accepts solid conductors 2×(2.5–16 mm²) and stranded 2×(6–16 mm²), 2×(10–50 mm²), or 1×(10–70 mm²). Auxiliary control wiring uses 2×(0.5–2.5 mm²) solid or stranded. ## Contact ratings and auxiliary circuit The auxiliary contacts are rated for various 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. The note \"for message 'Tripped'\" indicates this is the signalling contact that changes state when the relay trips, used for remote indication or PLC input. ## Compliance and substance restrictions The relay carries a substance prohibitance date of 03/01/2017, confirming RoHS/REACH compliance from that date onward.","metaTitle":"Siemens 3RU2146-4LD0 SIRIUS Thermal Overload Relay, S3, 45 k","metaDescription":"Siemens 3RU2146-4LD0 SIRIUS S3 thermal overload relay, Trip Class 10, 45 kW at 400 V, 690 V rated. Current 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":"125 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RU2146-4LD0","Height":"105 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","at 690 V":"0.75 A","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 70...90 A Thermal For motor protection Size S3, Class 10 Contactor mounting Main circuit: Screw Auxiliary circuit: spring-type terminal 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 ... 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","For Auxiliary And Control Circuit":"spring-loaded 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 ... 14)","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)","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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","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/d9c6120a23ab7fe4e15602387a47a7d8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630113&mlfb=3RU2146-4LD0"},"ai":{"faq":[{"question":"Where can I buy 3RU2146-4LD0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send an RFQ for a firm price and lead time."},{"question":"Will 3RU2146-4LD0 drop into a panel specified for 3RU2116-1FC1?","answer":"No — the 3RU2146-4LD0 is an S3 size overload relay, while the 3RU2116-1FC1 is a smaller frame. The S3 has different mounting dimensions and terminal capacity (M8 main terminals vs smaller on the S2). Rewiring and potentially a different contactor base are required."},{"question":"What does the 'for message Tripped' note mean?","answer":"It identifies the auxiliary contact that signals a trip condition — typically wired to a PLC input or indicator lamp to show the relay has tripped on overload."},{"question":"What compliance documentation does 3RU2146-4LD0 carry?","answer":"The relay has a substance prohibitance date of 03/01/2017, confirming RoHS and REACH compliance from that date. Operating temperature range is -40 to +70 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4LD0","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/3RU2146-4LD0 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}}