{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2026-1QB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2026-1QB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2026-1QB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1QB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2026-1QB0, Class 10E, 45 mm width, contactor mounting, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens SIRIUS 3RB2026-1QB0 is a solid-state overload relay rated Class 10E, meaning it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during locked-rotor starts without nuisance tripping on normal acceleration. It mounts directly on a contactor (contactor mounting per), saving DIN-rail space in the panel. ## ATEX and environmental fit Carries PTB 06 ATEX 3001 Ex II (2) GD certification, so it is approved for use in potentially explosive gas and dust atmospheres — Zone 1/2 gas and Zone 21/22 dust when installed in a suitable enclosure. ## Switching capacities and auxiliary contacts The relay provides no auxiliary contacts — all switching is internal to the solid-state trip circuit. For signal feedback, you must add an external contact block. Rated switching capacities: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V. The 0.02 W per pole dissipation keeps heat low in the enclosure. ## EMC and surge immunity Burst immunity tested to IEC 61000-4-4 severity 3: 2 kV on power ports, 1 kV on signal ports. Surge voltage resistance rated 6 kV. These figures mean the relay holds its trip accuracy in industrial environments with switching transients from contactors and drives — no external suppression needed for most panels.","metaTitle":"Siemens SIRIUS 3RB2026-1QB0 Solid-State Overload Relay, Clas","metaDescription":"Siemens SIRIUS 3RB2026-1QB0 solid-state overload relay, Class 10E, 45 mm wide, contactor-mount, ATEX Ex II (2) GD. 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":"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=59186&mlfb=3RB2026-1QB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1QB0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RB2026-1QB0's depth?","answer":"The depth is 75 mm."},{"question":"What compliance documentation does the 3RB2026-1QB0 carry?","answer":"It carries ATEX Ex II (2) GD certification (PTB 06 ATEX 3001) for explosive atmospheres, and the substance prohibitance date of 01.07.2006 indicates RoHS compliance. EMC burst immunity per IEC 61000-4-4 severity 3 is documented."},{"question":"Where can I buy the 3RB2026-1QB0 and how is it quoted?","answer":"It is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2026-1QB0","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/3RB2026-1QB0 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}}