{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2046-2UB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2046-2UB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RB2046-2UB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2046-2UB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2046-2UB0-ZX95, CLASS 20E, 3-pole, screw-type terminals, ATEX Ex II (2) GD, 124 x 70 x 106 mm.","salesMarkdown":"The Siemens 3RB2046-2UB0-ZX95 is a SIRIUS solid-state overload relay — a CLASS 20E trip curve device that protects three-phase motor circuits from sustained overcurrent without the mechanical wear of a bimetallic strip. It mounts directly onto a contactor (fastening method: contactor mounting), so the assembly stays compact on the DIN rail and the power wiring runs straight through without extra terminal blocks. The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) qualifies it for use in potentially explosive atmospheres. CLASS 20E trip curve allows 20 seconds of locked-rotor current before tripping — a standard match for general-purpose induction motors. Three poles for the main current circuit, screw-type terminals accepting solid conductors from 0.5 to 4 mm² and stranded from 10 to 70 mm². Auxiliary and control circuit terminals are also screw-type, rated for 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V — enough to switch a PLC input or a small contactor coil directly. Surge voltage resistance rated at 8 kV and burst immunity at 2 kV on power ports (IEC 61000-4-4 severity 3) — the relay holds up in industrial panels near VFDs or welding equipment without external suppression. Shock resistance of 15g / 11 ms and any mounting position — install it on a panel door or a machine frame without derating. Contactor mounting — clips directly onto the matching SIRIUS contactor so the power terminals align. Dimensions: 70 mm wide, 106 mm tall, 124 mm deep. Side clearance of 6 mm is required; zero clearance above, below, forwards, or backwards — so it packs tight against adjacent devices. RoHS compliance date of 07/01/2006 means it meets the original EU RoHS directive.","metaTitle":"Siemens 3RB2046-2UB0-ZX95 SIRIUS solid-state overload relay,","metaDescription":"Siemens 3RB2046-2UB0-ZX95 SIRIUS solid-state overload relay, CLASS 20E, 3 poles, screw terminals, ATEX, current production, available to order. Quoted on request.","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 20E","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=425014&mlfb=3RB2046-2UB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2046-2UB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the trip class of this overload relay?","answer":"It is a CLASS 20E trip curve, allowing 20 seconds of locked-rotor current before tripping — suited for standard induction motor starts."},{"question":"What wire sizes does the 3RB2046-2UB0-ZX95 accept?","answer":"Main circuit screw terminals accept solid 0.5–4 mm² (2x 0.5–2.5 mm²) and stranded 10–70 mm² (2x 10–50 mm²). Auxiliary terminals accept solid 0.5–2.5 mm² (2x 0.5–1.5 mm² finely stranded)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2046-2UB0-ZX95","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/3RB2046-2UB0-ZX95 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}}