{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2046-1UB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2046-1UB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2046-1UB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2046-1UB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2046-1UB0, CLASS 10E, 3-pole, screw-type terminals, ATEX Ex II (2) GD, 124 mm depth.","salesMarkdown":"The Siemens 3RB2046-1UB0 is a SIRIUS solid-state overload relay — it protects three-phase motor circuits by monitoring current and tripping if an overload condition persists beyond the CLASS 10E curve. Three poles for the main current circuit, with screw-type terminals on both the main and auxiliary/control sides. The main terminals accept solid wire from 0.5 to 4 mm² (or 2x 0.5 to 2.5 mm²) and stranded from 10 to 70 mm² (or 2x 10 to 50 mm²). AWG equivalents: 2x 10 to 1/0, or single 10 to 2/0. Auxiliary terminals take 2x 20 to 14 AWG. Mounts directly onto a contactor via the fastening method — no separate DIN-rail bracket needed, which saves panel space. Clearance: 0 mm upwards, forwards, and backwards; 6 mm at the side. The auxiliary contact ratings tell you what control voltage the relay can switch. At 24 V it handles 2 A; at 120 V it handles 4 A; at 230 V it handles 3 A. For DC loads: 0.55 A at 60 V, 0.3 A at 110/125 V, 0.11 A at 220 V. Surge voltage resistance rated at 8 kV, and immunity to electrical fast transients (burst) per IEC 61000-4-4 at severity level 3: 2 kV on power ports, 1 kV on signal ports. That means it's designed to hold up in industrial environments with switching transients from contactors and drives. Shock resistance rated at 15 g for 11 ms, so it can handle the vibration you'd see on a machine-mounted panel or near a large motor. Relative humidity during operation up to 100 %, including condensation — no derating needed for wet environments. ## Where it goes and compliance This is a solid-state overload relay for the SIRIUS family, designed to sit between a contactor and the motor in a standard motor starter assembly. The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) means it can be used in the control circuit of equipment installed in potentially explosive atmospheres — it's associated apparatus, not the field device itself, but it allows the starter to be part of a certified safety chain. Substance prohibitance date of 07/01/2006 aligns with RoHS compliance (no date-specific RoHS statement, but the date matches the EU RoHS exemption sunset).","metaTitle":"Siemens 3RB2046-1UB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB2046-1UB0 SIRIUS solid-state overload relay, CLASS 10E trip, 3 poles, ATEX Ex II (2) GD, screw terminals, 124 mm depth. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"124 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"70 mm","Height":"106 mm","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","Per Pole":"0.02 W","Stranded":"2x (10 ... 50 mm²), 10 ... 70 mm²","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","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 10E","At The Side":"6 mm","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Type Of Protection":"PTB 06 ATEX 3001 Ex II (2) GD","Product Designation":"solid-state overload relay","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"8 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","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":"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","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","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/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":"0.05 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=200188&mlfb=3RB2046-1UB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2046-1UB0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RB2046-1UB0?","answer":"The depth is 124 mm. Width is 70 mm, height is 106 mm."},{"question":"What wire sizes does the 3RB2046-1UB0 accept on the main terminals?","answer":"Solid wire: 0.5 to 4 mm² (or 2x 0.5 to 2.5 mm²). Stranded: 10 to 70 mm² (or 2x 10 to 50 mm²). AWG equivalents: 2x 10 to 1/0, or single 10 to 2/0."},{"question":"Does the 3RB2046-1UB0 have ATEX approval?","answer":"Yes, it carries PTB 06 ATEX 3001 Ex II (2) GD certification, meaning it's suitable for use in the control circuit of equipment in potentially explosive atmospheres (associated apparatus)."},{"question":"What is the trip class of the 3RB2046-1UB0?","answer":"CLASS 10E — it trips within 10 seconds at 7.2× the set current (cold start), which is standard for general-purpose motor protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2046-1UB0","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/3RB2046-1UB0 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}}