{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2036-2QB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2036-2QB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2036-2QB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2QB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2036-2QB0 solid-state overload relay, CLASS 20E, 3-pole, screw-type terminals, ATEX Ex II (2) GD.","salesMarkdown":"## Solid-state overload relay for motor protection The Siemens 3RB2036-2QB0 is a SIRIUS solid-state overload relay for three-phase motor circuits. This unit mounts directly onto a contactor (fastening method: contactor mounting), saving DIN-rail space in the panel. The 55 mm width and 92 mm height keep the footprint compact for a 3-pole device. Depth is 109 mm, which matters when planning gland-plate clearance or enclosure depth. ## Auxiliary contact ratings and control circuit The auxiliary and control circuit uses screw-type terminals accepting 0.5 to 4 mm² solid or 2x (0.5 to 2.5 mm²) stranded. The auxiliary contact ratings are voltage-dependent: 4 A at 120 V, 3 A at 230 V, 2 A at 24 V, 0.55 A at 60 V, 0.3 A at 110/125 V, and 0.11 A at 220 V. These cover most PLC input and contactor coil interface voltages, but verify the specific switching voltage against your control transformer — the 24 V DC rating of 2 A is adequate for typical relay coil loads. The 3RB2036-2QB0 carries ATEX Type of Protection PTB 06 ATEX 3001 Ex II (2) GD, certifying it for use in potentially explosive atmospheres — specifically as a protective device associated with equipment in Zone 1/21 (gas/dust) areas. Surge voltage resistance is rated at 6 kV, and EMC immunity includes 2 kV burst on power ports and 1 kV on signal ports per IEC 61000-4-4, severity level 3. The substance prohibition date of 07/01/2006 aligns with RoHS compliance scope.","metaTitle":"Siemens 3RB2036-2QB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB2036-2QB0 SIRIUS solid-state overload relay, CLASS 20E, 3-pole, screw terminals, ATEX Ex II (2) GD. Current 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":"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":"6 ... 25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$403.58","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=452452&mlfb=3RB2036-2QB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2036-2QB0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this relay carry?","answer":"It carries ATEX Type of Protection PTB 06 ATEX 3001 Ex II (2) GD for explosive atmospheres, surge voltage resistance of 6 kV, and EMC burst immunity per IEC 61000-4-4 severity level 3. The substance prohibition date of 07/01/2006 aligns with RoHS requirements."},{"question":"What are the key dimensions for panel fit?","answer":"Width is 55 mm, height is 92 mm, and depth is 109 mm. It mounts directly onto a contactor, not on DIN rail."},{"question":"What wire sizes does the main circuit accept?","answer":"The main current circuit screw terminals accept 1 to 35 mm² stranded or 2x up to 25 mm². AWG equivalents are 18 to 2 for single conductors and 2x up to 4 AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2036-2QB0","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/3RB2036-2QB0 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}}