{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2036-1QX1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2036-1QX1","canonicalUrl":"https://aoctrl.com/siemens/3RB2036-1QX1","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2036-1QX1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2036-1QX1, CLASS 10E, 3 poles, ATEX Ex II (2) GD, 55 x 92 x 109 mm, spring-loaded terminals.","salesMarkdown":"The Siemens 3RB2036-1QX1 is a SIRIUS solid-state overload relay — it protects three-phase motor circuits against overload and phase failure by monitoring current through straight-through transformers and tripping the contactor when the thermal model exceeds the CLASS 10E curve. It carries PTB 06 ATEX 3001 Ex II (2) GD certification, so it can be used in Zone 22 dust atmospheres and Zone 2 gas atmospheres when paired with an appropriate contactor — the relay itself is mounted outside the hazardous area but protects motors inside it. This relay is designed for stand-alone installation — it does not clip directly onto a contactor, so you mount it separately on the DIN rail and wire it to the contactor's control circuit. Dimensions are 55 mm wide, 92 mm high, and 109 mm deep — it takes up a standard 55 mm DIN-rail slot, and the 109 mm depth means it will clear most enclosure back panels without issue. The auxiliary and control circuit uses spring-loaded terminals (push-in type), accepting 2x (0.25... 1.5 mm²) solid or 2x (0.25... 1.5 mm²) finely stranded with ferrule, or 2x (24... 16) AWG — no screwdriver needed for the control wiring. ## Auxiliary contact ratings and electrical environment The relay has one normally-closed (NC) auxiliary contact and zero changeover (CO) contacts — the NC contact is the trip signal that opens the contactor coil circuit on overload. That NC contact is rated for switching: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and also 0.55 A at 60 V, 0.3 A at 110 V, 0.3 A at 125 V, 0.11 A at 220 V — these are the maximum continuous currents at those voltages, so match your contactor coil draw against the appropriate row. Surge voltage resistance is rated at 6 kV, and it withstands 2 kV burst on power ports and 1 kV on signal ports per IEC 61000-4-4, severity level 3 — solid immunity for industrial environments with contactors and drives nearby. Shock resistance is 15g for 11 ms, and it operates in -25 to +60 °C ambient with 100 % relative humidity — fine for unheated machine enclosures and washdown areas as long as the enclosure itself keeps direct spray off the relay. RoHS compliance date is July 1, 2006, meaning it meets the original RoHS directive; REACH and ATEX documentation are available from Siemens. The IEC 81346-2 reference code is F, which designates it as a protective device in the standard functional naming scheme — useful for panel documentation and BOM consistency.","metaTitle":"Siemens 3RB2036-1QX1 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens SIRIUS 3RB2036-1QX1 solid-state overload relay, CLASS 10E, 3 poles, ATEX, 55x92x109 mm. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"109 mm","Solid":"2x (0.25 ... 1.5 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","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":"stand-alone installation","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":"straight-through transformers","Substance Prohibitance (Date)":"07/01/2006","For Auxiliary And Control Circuit":"spring-loaded terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 16)","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":"2x (0.25 ... 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":"6 ... 25 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=83632&mlfb=3RB2036-1QX1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2036-1QX1/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to know for panel design?","answer":"It is a CLASS 10E solid-state overload relay for 3-phase motors, with one NC auxiliary contact rated 2 A at 24 V, 4 A at 120 V, or 3 A at 230 V. Dimensions are 55 x 92 x 109 mm, and it mounts in any position with only 6 mm side clearance needed."},{"question":"Does it have ATEX certification?","answer":"Yes, it carries PTB 06 ATEX 3001 Ex II (2) GD certification, suitable for use in Zone 22 dust and Zone 2 gas atmospheres when paired with an appropriate contactor."},{"question":"What compliance documentation is available?","answer":"RoHS compliance date is July 1, 2006. ATEX certification is listed. REACH and other EU compliance documents are available from Siemens."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2036-1QX1","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/3RB2036-1QX1 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}}