{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3046-2UW1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3046-2UW1","canonicalUrl":"https://aoctrl.com/siemens/3RB3046-2UW1","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3046-2UW1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB3046-2UW1, CLASS 20E, rated thermal current 50 A, 50-60 Hz, size S3, stand-alone installation.","salesMarkdown":"The Siemens 3RB3046-2UW1 is a SIRIUS solid-state overload relay, size S3, designed to protect motors against overload and phase failure in 50-60 Hz AC circuits. Its CLASS 20E trip class means it allows a 20-second cold-start acceleration before tripping — a good fit for conveyors, pumps, and fans with moderate inertia. The electronic overload release gives accurate, drift-free protection without the heating hysteresis of a bimetal relay. The auxiliary switch is integrated and rated for switching at various control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V — these are the contact ratings for the signaling contact, not the main power path. The main circuit uses straight-through transformers, meaning the motor leads pass directly through the relay body without looping; this keeps wiring clean and avoids extra bending radius in the panel. Mounts in any position — stand-alone installation on a flat panel or DIN rail. Dimensions: 70 mm wide, 106 mm high, 124 mm deep. That 124 mm depth means it sticks out a bit from the rail; check clearance to the enclosure door or adjacent devices. Vibration resistance: 1-6 Hz at 15 mm amplitude, 6-500 Hz at 20 m/s², 10 cycles — solid for industrial panels on machine frames. Shock resistance: 8g / 11 ms for the signaling contact in tripped position, 15g / 11 ms for the relay body.","metaTitle":"Siemens 3RB3046-2UW1 SIRIUS Solid-State Overload Relay, CLAS","metaDescription":"Siemens 3RB3046-2UW1 SIRIUS solid-state overload relay, CLASS 20E, rated thermal current 50 A, 50-60 Hz. Sourced to order against RFQ. RoHS compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"124 mm","Solid":"1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)","Width":"70 mm","Height":"106 mm","at 24 V":"2 A","at 60 V":"0.55 A","Per Pole":"0.07 W","at 110 V":"0.3 A","at 120 V":"4 A","at 125 V":"0.3 A","at 220 V":"0.11 A","at 230 V":"3 A","Trip Class":"CLASS 20E","Rated Value":"1 000 V","During Storage":"-40 ... +80 °C","Thermal Current":"50 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"stand-alone installation","Shock Resistance":"8g / 11 ms","Mounting Position":"any","Solid Or Stranded":"1x (0,5 ... 4 mm²), 2x (0,5 ... 2,5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"solid-state overload relay","Vibration Resistance":"1-6 Hz, 15 mm; 6-500 Hz, 20 m/s²; 10 cycles","at 480 V rated value":"50 A","at 600 V rated value":"50 A","Size Of Overload Relay":"S3","For Main Current Circuit":"straight-through transformers","Temperature Compensation":"-25 ... +60 °C","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","according to IEC 60068-2-27":"15g / 11 ms; Signaling contact 97 / 98 in position \"Tripped\": 8g / 11 ms","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":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"50 A","for AC motors at 500 V at 50 Hz":"11 ... 30 kW","for AC motors at 690 V at 50 Hz":"11 ... 45 kW","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 200 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 200 A","for 3-phase motors at 400 V at 50 Hz":"7.5 ... 22 kW","Of The Auxiliary And Control Contacts":"M3","for AWG cables for auxiliary contacts":"2x (20 ... 14)","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","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","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"No","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","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","power loss [W] for rated value of the current at AC in hot operating state":"0.2 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"12.5 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629740&mlfb=3RB3046-2UW1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB3046-2UW1/alternatives.json"},"ai":{"faq":[{"question":"What is 3RB3046-2UW1's listed depth (124 mm) on this component line?","answer":"The depth is 124 mm. That's the dimension from the mounting surface to the farthest point of the relay body — important for enclosure depth clearance, especially when mounted on a DIN rail with the door closed."},{"question":"Will 3RB3046-2UW1 drop into a panel that was specified around 3RU2116-1FC1 without rewiring?","answer":"Not directly — the 3RU2116-1FC1 is a bimetal overload relay with a different footprint and wiring scheme. The 3RB3046-2UW1 is a solid-state electronic relay (size S3) with straight-through transformers; it requires different panel layout and wiring. No drop-in replacement without rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3046-2UW1","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/3RB3046-2UW1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}