{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2146-4HB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2146-4HB0","canonicalUrl":"https://aoctrl.com/siemens/3RU2146-4HB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2146-4HB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU2146-4HB0, CLASS 10, 690 V rated, 22 kW at 400 V, S3 size, screw-type terminals, contactor-mount.","salesMarkdown":"The relay is rated for 690 V and carries a CLASS 10 trip class, meaning it will trip within 10 seconds at 7.2× the set current — standard for protecting standard induction motors during startup. The 3RU2146-4HB0 is rated for 22 kW at 400 V, 30 kW at 500 V, and 45 kW at 690 V — these are the motor power ratings it can protect at those line voltages. The auxiliary contact ratings cover a wide control-voltage range: 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. That means the same relay works in 24 VDC control circuits and 400 VAC signal circuits without a separate interface relay. Main-circuit terminals accept solid wire 2x (2.5 to 16 mm²) and stranded wire 2x (6 to 16 mm²), 2x (10 to 50 mm²), or 1x (10 to 70 mm²). The auxiliary terminals accept solid or stranded 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). The screwdriver interface is a 4 mm hexagon socket — keep a hex bit in your kit, not a flathead. The relay mounts in any position, which helps when you're squeezing it into a tight corner of the panel. The relay carries a substance prohibitance date of 03/01/2017, indicating RoHS and REACH compliance from that date.","metaTitle":"Siemens 3RU2146-4HB0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2146-4HB0 SIRIUS thermal overload relay, CLASS 10, 690 V rated, 22 kW at 400 V. S3 size, contactor-mount. 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":"125 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","title":"3RU2146-4HB0","Height":"105 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"5.1 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 36...50 A Thermal For motor protection Size S3, Class 10 Contactor mounting 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":"Contactor mounting","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":"22 kW","at 480 V rated value":"40 A","at 500 V rated value":"30 kW","at 600 V rated value":"41 A","at 690 V rated value":"45 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":"50 A","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: 160 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":"50 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":"15.3 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"36 ... 50 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":"$64.77","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e85f65e17aa9fd49a8465b2f97a66d61.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630101&mlfb=3RU2146-4HB0"},"ai":{"faq":[{"question":"Who supplies 3RU2146-4HB0 and how is it quoted for volume purchases?","answer":"The 3RU2146-4HB0 is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for volume pricing and lead time."},{"question":"When sourcing 3RU2146-4HB0, what's the closest functional second-source — 3RU2116-1FC1?","answer":"The 3RU2116-1FC1 is a smaller-frame SIRIUS overload relay (S0 size) with lower current ratings. It will not drop into a panel wired for the S3-size 3RU2146-4HB0 without changing the contactor base and rewiring the main terminals. The 3RU2146-4HB0 is the correct S3-frame part for higher-power motor circuits."},{"question":"What is 3RU2146-4HB0's listed note (for message 'Tripped') on this component line?","answer":"The note field for the 3RU2146-4HB0 reads 'for message \"Tripped\"' — this is a diagnostic indicator that the relay's auxiliary contacts can signal a tripped state to a PLC or HMI."},{"question":"What is 3RU2146-4HB0's listed depth (125 mm) on this component line?","answer":"The 3RU2146-4HB0 has a depth of 125 mm. This is the dimension from the mounting surface to the furthest protruding point — critical to check when fitting into a shallow enclosure."},{"question":"Will 3RU2146-4HB0 drop into a panel that was specified around 3RU2116-1FC1 without rewiring?","answer":"No. The 3RU2146-4HB0 is an S3-size relay, while the 3RU2116-1FC1 is S0-size. The mounting hole pattern, contactor interface, and terminal spacing are different. You would need to replace the contactor base and re-terminate the main power cables."},{"question":"What compliance documentation does this brand provide for 3RU2146-4HB0 (RoHS, REACH, UL, IEC)?","answer":"The 3RU2146-4HB0 carries a substance prohibitance date of 03/01/2017, confirming RoHS and REACH compliance from that date. Standard Siemens documentation includes a CE declaration and IEC 60947-4-1 compliance for thermal overload relays."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2146-4HB0","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/3RU2146-4HB0 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}}