{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2036-2QW1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2036-2QW1","canonicalUrl":"https://aoctrl.com/siemens/3RB2036-2QW1","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2QW1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2036-2QW1 solid-state overload relay, 3-pole, CLASS 20E trip class, ATEX Ex II (2) GD, screw terminals, 55 x 92 x 109 mm.","salesMarkdown":"The Siemens SIRIUS 3RB2036-2QW1 is a 3-pole solid-state overload relay designed to protect motors against overload and phase failure. Its CLASS 20E trip class means it will trip within 20 seconds at 7.2× the set current, a standard match for general-purpose induction motors driving pumps, fans, and conveyors — not for high-inertia loads that need a longer 30E class. It carries ATEX Ex II (2) GD certification for gas and dust hazardous areas. The substance prohibition date is 07/01/2006. The relay operates with straight-through transformers for the main current circuit, meaning the motor power cables pass directly through the relay housing without looping. This keeps the wiring compact and reduces the chance of a loose connection at the transformer terminals. The auxiliary contact block provides one normally-closed (NC) contact and no normally-open (CO) contacts. That single NC is typically wired into the motor contactor's control circuit as a safety chain break — if the relay trips, the NC opens and drops out the contactor. With no NO spare, you cannot also signal a trip to a PLC without adding an external interface relay. Switching capacity varies with voltage: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V. At higher control voltages like 220 V it drops to 0.11 A, so verify your pilot duty load matches the curve at your actual control voltage — particularly if driving multiple contactors in parallel. Surge voltage withstand is rated at 6 kV, and burst immunity meets IEC 61000-4-4 severity level 3 (2 kV on power ports, 1 kV on signal ports). In a panel with VFDs or contactor switching nearby, that level of transient immunity means the relay is unlikely to nuisance-trip from conducted EMI on the control wiring. Shock resistance is 15g for 11 ms, so it can be mounted on a panel door or a machine frame that sees occasional impact — not a high-vibration crusher or press, but typical industrial machinery. Power dissipation is just 0.02 W per pole, so the relay adds negligible heat to the enclosure. No derating calculation needed for this component in a sealed box. Mounting is stand-alone — no DIN-rail clip, no snap-on. The relay is fastened directly to a mounting plate with screws. It can be installed in any orientation, which helps when fitting into a crowded panel where vertical or horizontal clearance is tight. Dimensions: 55 mm wide, 92 mm tall, and 109 mm deep. Depth determines enclosure clearance. Clearance distances: 0 mm upwards, forwards, backwards, and downwards — meaning it can be butted directly against other components or the enclosure wall on those sides. Side clearance needs 6 mm, so plan for that gap between adjacent devices. Screw-type terminals accept solid conductors from 0.5 to 4 mm² on the main circuit, and 0.5 to 2.5 mm² for auxiliary wiring. Two conductors of the same size can be terminated per clamp, useful for daisy-chaining control power. Relative humidity during operation can reach 100 %, so condensation inside the enclosure is not a problem for the relay itself — but the screw terminals should be torqued to spec to avoid corrosion in persistently wet environments. The substance prohibition date of 07/01/2006 aligns with the original EU RoHS directive (RoHS 1). The relay is RoHS-compliant for that standard; if RoHS 3 (2011/65/EU + 2015/863) compliance documentation is needed for your quality file, request the manufacturer's declaration of conformity with the order.","metaTitle":"Siemens SIRIUS 3RB2036-2QW1 solid-state overload relay, CLAS","metaDescription":"Siemens SIRIUS 3RB2036-2QW1 solid-state overload relay, 3-pole, CLASS 20E, ATEX Ex II (2) GD. Active production. Screw terminals, 109 mm depth. 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","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":"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":"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":"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=147069&mlfb=3RB2036-2QW1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2QW1/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this relay carry?","answer":"It carries ATEX Ex II (2) GD certification for gas and dust hazardous areas. The substance prohibition date of 07/01/2006 indicates RoHS compliance per the original EU directive. No UL or CSA listing is stated in the available specifications."},{"question":"What wire sizes does the 3RB2036-2QW1 accept?","answer":"Solid conductors from 0.5 to 4 mm² for the main circuit, and 0.5 to 2.5 mm² for auxiliary/control wiring. Two conductors of the same gauge can be terminated per clamp. AWG equivalents for auxiliary contacts are 2x (20 to 14)."},{"question":"What is the depth of this overload relay?","answer":"109 mm. This is the dimension from the mounting surface to the front of the housing, and it determines the minimum enclosure depth needed."},{"question":"Can the 3RB2036-2QW1 be mounted on a DIN rail?","answer":"No. The fastening method is stand-alone installation — it is screwed directly to a mounting plate. There is no DIN-rail clip or snap-on feature."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2036-2QW1","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/3RB2036-2QW1 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}}