{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4FD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4FD0","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4FD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4FD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU2146-4FD0, CLASS 10, S3 size, 690 V rated, screw terminals.","salesMarkdown":"The relay mounts directly onto a contactor via the M8 main contact fastening method, eliminating separate panel wiring for the power circuit. Rated insulation voltage is 690 V, with a rated operating voltage up to 1 000 V in AC-3e duty — this covers 690 V motor circuits common in European and North American industrial panels. Power dissipation per pole is 4.5 W; at full load on a three-phase motor, expect roughly 13.5 W total heat inside the enclosure — factor this into your panel thermal budget. The auxiliary contact ratings are given across multiple 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 — these are the switching limits for the trip-indication circuit, not the main motor current. The relay accepts screw-type terminals for the main circuit: solid conductors 2× (2.5 to 16 mm²), stranded 2× (6 to 16 mm²), and larger cables up to 1× (10 to 70 mm²) stranded for the line side. Control-circuit wiring uses a separate terminal pair accepting 2× (0.5 to 2.5 mm²) solid or stranded — keep these wires segregated from the power conductors to avoid induced noise on the trip signal. Substance prohibitance compliance date is March 1, 2017, indicating the design meets RoHS and REACH substance restrictions as of that revision.","metaTitle":"Siemens 3RU2146-4FD0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2146-4FD0 SIRIUS thermal overload relay, CLASS 10 trip, S3 size, 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":"3RU2146-4FD0","Height":"105 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"4.5 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 28...40 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":"18.5 kW","at 480 V rated value":"40 A","at 500 V rated value":"22 kW","at 600 V rated value":"32 A","at 690 V rated value":"37 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":"40 A","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","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: 80 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: 160 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":"40 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":"13.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"28 ... 40 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/774040933236bc3b55e397e17915efc2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630100&mlfb=3RU2146-4FD0"},"ai":{"faq":[{"question":"What does the 'Tripped' message note mean on this relay?","answer":"The note indicates that the auxiliary contact position corresponds to the relay having tripped — the normally-open contact closes and the normally-closed opens when the overload relay operates."},{"question":"What is the depth of 3RU2146-4FD0?","answer":"The depth is 125 mm, with a width of 70 mm and height of 105 mm — these dimensions include the relay body only, not the contactor it mounts to."},{"question":"Will 3RU2146-4FD0 drop into a panel specified around 3RU2116-1FC1?","answer":"Both are SIRIUS thermal overload relays, but the 3RU2146-4FD0 is size S3 while the 3RU2116-1FC1 is size S0 — the mounting hole pattern and contactor interface differ, so it will not directly interchange without changing the contactor and possibly the enclosure backplate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4FD0","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/3RU2146-4FD0 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}}