{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2036-2UB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2036-2UB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RB2036-2UB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2UB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2036-2UB0-ZX95, CLASS 20E, 3-pole, screw terminals, contactor mounting, ATEX Ex II (2) GD.","salesMarkdown":"It mounts directly onto a contactor, saving DIN-rail space and simplifying the wiring between the contactor and the overload block. Rated for a CLASS 20E trip curve, this relay allows a longer starting duration — up to 20 seconds at 600% of the set current — making it a fit for high-inertia loads like fans, centrifuges, or crushers that need an extended acceleration ramp without nuisance tripping. The ATEX Ex II (2) GD approval means it can be installed in the non-hazardous area of a zone 2 gas or zone 22 dust application, protecting a motor that sits in the hazardous zone. The relay itself is mounted outside the hazardous area. Fastening method is contactor mounting — the relay clips directly onto the front of a matching SIRIUS contactor (e.g., the 3RT2 series). This creates a compact motor starter assembly with no additional wiring between the contactor output and the overload input. The enclosure dimensions are 92 mm height, 55 mm width, and 109 mm depth — the depth is the dimension that projects forward from the contactor face. This allows zero-gap stacking vertically and only 6 mm lateral spacing between units. ## Terminal and Wiring Main current circuit terminals accept solid conductors from 0.5 to 4 mm² (or 2x 0.5 to 2.5 mm²) and stranded conductors from 1 to 35 mm² (or 2x up to 25 mm²). AWG equivalents: 2 x max. 4 AWG, or 1 x 18 to 2 AWG for the main contacts. Auxiliary and control circuit terminals are also screw-type, accepting 2x 20 to 14 AWG. Finely stranded wire with core-end processing: 0.5 to 2.5 mm², or 2x 0.5 to 1.5 mm². The auxiliary contact block is rated for switching at various control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and lower ratings for DC voltages — 0.55 A at 60 V, 0.3 A at 110 V or 125 V, and 0.11 A at 220 V. These are the make/break capacities for the signal contacts. ## Environmental and EMC Relative humidity during operation can reach 100%, so the relay handles condensing environments without derating. Shock resistance is 15g / 11 ms, suitable for panel-mounted equipment near rotating machinery or conveyors. EMC immunity to electrical fast transients (burst) per IEC 61000-4-4 is 2 kV on power ports and 1 kV on signal ports, severity level 3. Substance prohibition date is 07/01/2006, aligning with the original EU RoHS directive (2002/95/EC).","metaTitle":"Siemens 3RB2036-2UB0-ZX95 SIRIUS Solid-State Overload Relay,","metaDescription":"Siemens 3RB2036-2UB0-ZX95 SIRIUS solid-state overload relay, CLASS 20E, 3-pole, ATEX Ex II (2) GD, contactor mounting. Sourced to order. Request a quote.","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=275720&mlfb=3RB2036-2UB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2UB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the trip class of the 3RB2036-2UB0-ZX95?","answer":"It is a CLASS 20E overload relay, meaning it allows up to 20 seconds of starting current at 600% of the set current before tripping, suitable for high-inertia loads."},{"question":"What ATEX approval does this overload relay carry?","answer":"It carries ATEX Ex II (2) GD certification (PTB 06 ATEX 3001), allowing it to be used in the non-hazardous area protecting a motor in a zone 2 gas or zone 22 dust environment."},{"question":"What are the mounting dimensions of the 3RB2036-2UB0-ZX95?","answer":"The dimensions are 92 mm height, 55 mm width, and 109 mm depth. It mounts directly onto a contactor with zero clearance required upwards, forwards, backwards, and downwards, and 6 mm at the side."},{"question":"Where can I buy the 3RB2036-2UB0-ZX95?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2036-2UB0-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/3RB2036-2UB0-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}}