{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2026-1SB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2026-1SB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2026-1SB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1SB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2026-1SB0, CLASS 10E trip, 3 poles, screw terminals, contactor mounting, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2026-1SB0 is a SIRIUS solid-state overload relay — a CLASS 10E trip device that protects three-phase motor circuits from sustained overcurrent. It carries ATEX approval PTB 06 ATEX 3001 Ex II (2) GD, meaning it can be used in Zone 2 gas and Zone 22 dust hazardous areas when paired with an appropriate motor starter — a key spec for chemical, grain, or pharmaceutical lines where an arc from a failing thermal overload could ignite the atmosphere. The relay mounts directly onto a contactor (contactor mounting), saving DIN-rail space in a crowded panel. ## Integration notes Wiring: main circuit terminals accept solid 0.5 to 4 mm² or 2× (0.5 to 2.5 mm²) — fine-stranded with ferrules also supported down to 0.5 mm². Auxiliary/control terminals use the same screw-type clamp, accepting 2× (0.5 to 2.5 mm²) solid or 2× (0.5 to 1.5 mm²) fine-stranded. The 6 kV surge voltage rating (IEC 61000-4-5) and 2 kV burst immunity (IEC 61000-4-4, severity 3) mean it holds up in industrial environments with motor drives and contactor switching nearby. Shock rated to 15g / 11 ms — fine for machine-mounted enclosures on punch presses or conveyors. The 0.02 W dissipation per pole keeps heat low inside a sealed cabinet.","metaTitle":"Siemens 3RB2026-1SB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB2026-1SB0 SIRIUS solid-state overload relay, CLASS 10E trip, ATEX Ex II (2) GD, contactor-mount, 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":"75 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"73 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":"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)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (14 ... 10)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","due to burst acc. to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code acc. to IEC 81346-2":"F","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","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","electrostatic discharge acc. to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","operating voltage at AC-3 rated value maximum":"690 V","field-based interference acc. to IEC 61000-4-3":"10 V/m","Size Of Contactor Can Be Combined Company-Specific":"S0","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV (line to earth) corresponds to degree of severity 3","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":"3 ... 12 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=248161&mlfb=3RB2026-1SB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1SB0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this relay carry?","answer":"It holds ATEX approval PTB 06 ATEX 3001 Ex II (2) GD for hazardous-area use. RoHS compliance is indicated by the substance prohibitance date of 01.07.2006. EMC immunity is verified to IEC 61000-4-4 (burst) and IEC 61000-4-5 (surge 6 kV)."},{"question":"What wire sizes does the 3RB2026-1SB0 accept?","answer":"Main circuit terminals accept solid 0.5 to 4 mm² (or 2× 0.5 to 2.5 mm²) and AWG 14 to 10. Auxiliary terminals accept 2× 0.5 to 2.5 mm² solid or 2× 0.5 to 1.5 mm² fine-stranded, and AWG 20 to 14."},{"question":"What is the depth of the 3RB2026-1SB0?","answer":"75 mm. Combined with the 45 mm width and 73 mm height, it fits the standard SIRIUS contactor footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2026-1SB0","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/3RB2026-1SB0 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}}