{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4MD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4MD1","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4MD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4MD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2146-4MD1 thermal overload relay, Size S3, CLASS 10, 45 kW at 400 V, screw-type terminals, stand-alone installation.","salesMarkdown":"It's the Size S3 frame, which means it's sized for the larger end of the SIRIUS relay range, handling motor power up to 45 kW at 400 V rated value. That's the standard for most general-purpose motor starting — pumps, fans, compressors — where you need fast protection but enough time for the motor to accelerate past locked-rotor current. The relay's power ratings scale with line voltage: 45 kW at 400 V, 55 kW at 500 V, and 90 kW at 690 V. At 480 V the continuous current rating is 96 A; at 600 V it's 99 A. That tells you the relay is current-limited at the lower voltages and voltage-limited at the top end. Auxiliary contact ratings cover the control circuit: 2 A at 24 V and at 230 V, 3 A at 120 V, 1 A at 400 V, and 0.75 A at 690 V. The 0.22 A at 125 V and 0.11 A at 220 V are for DC control circuits. That's enough to signal a PLC input or drop out a contactor coil, but verify your specific control voltage against the table. The relay is temperature-compensated from -40 to +60 °C, so the trip characteristic stays stable across a hot panel or a cold warehouse. Fastening method is stand-alone installation — it mounts directly to the mounting plate, not ganged to a contactor. Main circuit terminals are screw-type, M8, accepting solid conductors 2x (2.5 to 16 mm²) and stranded 2x (6 to 16 mm²), 2x (10 to 50 mm²), or 1x (10 to 70 mm²). Auxiliary/control terminals accept 2x (0.5 to 2.5 mm²) solid or stranded. The screwdriver tip required is a 4 mm hexagon socket. Dimensions are 70 mm wide, 120 mm high, 140 mm deep — that's the envelope for panel cutout and clearance. The S3 frame is the largest of the SIRIUS relay sizes, so check your enclosure depth before committing the BOM line. For the substance compliance documentation: the evidence lists a substance prohibitance date of 03/01/2017, which aligns with RoHS and REACH compliance timelines. The part carries the SIRIUS brand and is designed to IEC/EN 60947-4-1 standards for motor protection.","metaTitle":"Siemens 3RU2146-4MD1 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2146-4MD1 SIRIUS thermal overload relay, Size S3, CLASS 10 trip, 45 kW at 400 V. 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":"140 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RU2146-4MD1","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","at 690 V":"0.75 A","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 80...100 A Thermal For motor protection Size S3, Class 10 Stand-alone installation 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":"stand-alone installation","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":"96 A","at 500 V rated value":"55 kW","at 600 V rated value":"99 A","at 690 V rated value":"90 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":"100 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: 200 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":"100 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":"80 ... 100 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/37f475aed56104b801ab18cb089b9db4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630118&mlfb=3RU2146-4MD1"},"ai":{"faq":[{"question":"What is the note for message 'Tripped' on this component line?","answer":"The listed note is 'for message \"Tripped\"' — it indicates the auxiliary contact configuration is wired to signal a tripped condition back to the control system."},{"question":"Where can I buy 3RU2146-4MD1 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."},{"question":"What are the key specifications of 3RU2146-4MD1?","answer":"It is a SIRIUS Size S3 thermal overload relay, CLASS 10 trip, rated 45 kW at 400 V, 55 kW at 500 V, 90 kW at 690 V, with screw-type terminals and stand-alone mounting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4MD1","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/3RU2146-4MD1 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}}