{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2036-2UB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2036-2UB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2036-2UB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2UB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2036-2UB0 solid-state overload relay, CLASS 20E trip curve, 3-pole, screw-type terminals, 109 mm depth, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2036-2UB0 is a SIRIUS solid-state overload relay — a CLASS 20E device that protects three-phase motor circuits against overload and phase imbalance by monitoring current and tripping on a delayed curve. It mounts directly onto a contactor (fastening method: contactor mounting), so the relay and contactor form a single compact unit on the DIN rail, saving panel space compared to separate overload blocks. Three poles for the main current circuit, screw-type terminals accepting solid conductors from 0.5 to 4 mm² (2x 0.5 to 2.5 mm²) and stranded up to 1x 35 mm² or 2x 25 mm². The auxiliary and control circuit also uses screw terminals, accepting 2x 20–14 AWG. Surge voltage resistance is rated at 6 kV, and the relay withstands bursts of 2 kV on power ports and 1 kV on signal ports per IEC 61000-4-4 severity level 3 — meaning it's hardened for industrial electrical noise environments without external filtering. Storage and transport range extends to -40 to +80 °C. Shock resistance is 15g for 11 ms, so it handles the vibration of contactor switching and nearby motor starts without nuisance tripping. Mounting position is any, which helps when panel layout forces a sideways or inverted relay. Carries ATEX type protection PTB 06 ATEX 3001 Ex II (2) GD, meaning it's approved for use in potentially explosive atmospheres (gas and dust) when installed in the safe area with sensors in the hazardous zone. RoHS compliant with substance prohibition date 07/01/2006.","metaTitle":"Siemens 3RB2036-2UB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens SIRIUS 3RB2036-2UB0 solid-state overload relay, CLASS 20E, 3 poles, screw terminals, ATEX Ex II (2) GD, 109 mm depth. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"109 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"55 mm","Height":"92 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 (max. 25 mm²), 1 ... 35 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":"2 x (max. 4), 1 x (18 ... 2)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 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":"S2","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":"690 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=58370&mlfb=3RB2036-2UB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2UB0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this overload relay?","answer":"The depth is 109 mm, which is the dimension from the DIN-rail mounting surface to the front of the housing."},{"question":"What wire sizes does the 3RB2036-2UB0 accept on the main circuit?","answer":"Screw terminals accept solid conductors 0.5 to 4 mm² (dual-wire 0.5 to 2.5 mm²) and stranded conductors 1 to 35 mm² (dual-wire up to 25 mm²). In AWG, that's 2 x max 4 AWG or 1 x 18 to 2 AWG."},{"question":"Does it have ATEX certification?","answer":"Yes, ATEX type PTB 06 ATEX 3001 Ex II (2) GD for gas and dust explosive atmospheres."},{"question":"What compliance documentation is available?","answer":"RoHS compliant with substance prohibition date 07/01/2006. The relay carries ATEX certification and meets IEC 61000-4-4 burst immunity at severity level 3."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2036-2UB0","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/3RB2036-2UB0 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}}