{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2026-1RB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2026-1RB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2026-1RB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1RB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2026-1RB0, Class 10E, 3-pole, 1 NC auxiliary contact, screw terminals, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens SIRIUS 3RB2026-1RB0 is a solid-state overload relay for three-phase motor protection, rated Trip Class 10E, with one normally-closed auxiliary contact and screw-type terminals for both main and control circuits. It mounts directly onto a contactor (contactor mounting), saving panel space and simplifying wiring — no separate base or bracket needed. The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) allows installation in Zone 2 gas and Zone 22 dust hazardous areas when paired with an appropriate contactor and enclosure. The auxiliary circuit carries 2 A at 24 V DC and 4 A at 120 V AC, sufficient for direct PLC input or contactor coil feedback; at 230 V AC it drops to 3 A, so verify the load on a 230 V control transformer. Surge voltage withstand of 6 kV (rated impulse) and burst immunity of 2 kV on power ports per IEC 61000-4-4, severity level 3, means it will hold up in industrial environments with switching transients from contactors and drives. Mounts in any position (any mounting position) on the contactor, with zero clearance needed upwards, downwards, forwards, and backwards — only 6 mm side clearance required. Screw terminals accept 0.5–4 mm² solid or 0.5–2.5 mm² finely stranded with ferrules, and 2× 0.5–2.5 mm² for auxiliary contacts — covers standard panel wire sizes without special tools. Shock rated 15 g / 11 ms, so it survives transport and machine vibration on a conveyor or press line. Substance prohibitance date of 07/01/2006 indicates RoHS compliance (EU RoHS effective July 2006); the relay also carries ATEX certification and is built to IEC 60947-4-1 for overload relays. Operating temperature range -25 to +60 °C, storage -40 to +80 °C, and 100 % relative humidity — suitable for unconditioned enclosures in washdown or outdoor environments as long as the contactor and enclosure meet the same rating.","metaTitle":"Siemens 3RB2026-1RB0 SIRIUS Solid-State Overload Relay, Clas","metaDescription":"Siemens 3RB2026-1RB0 SIRIUS solid-state overload relay, Class 10E, 3-pole, 1 NC auxiliary contact, screw terminals, ATEX Ex II (2) GD. Quoted 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)":"07/01/2006","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","for 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":"S0","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":"0.1 ... 0.4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$43.68","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=366349&mlfb=3RB2026-1RB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2026-1RB0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RB2026-1RB0?","answer":"The 3RB2026-1RB0 is a solid-state overload relay with Class 10E trip curve and 1 NC auxiliary contact. The peer MPNs 3RT1016-1AR11, 3RT1016-1AG61, and 3RT6017-1KF42 are contactors, not overload relays, so they are not direct substitutes. For a functional second-source, look for another SIRIUS solid-state overload relay with the same trip class and pole count — the 3RB20 series offers variants with different auxiliary contact configurations."},{"question":"What compliance documentation does Siemens provide for 3RB2026-1RB0?","answer":"The relay carries ATEX certification (PTB 06 ATEX 3001 Ex II (2) GD), RoHS compliance (substance prohibitance date 07/01/2006), and is built to IEC 60947-4-1. The manufacturer provides a declaration of conformity and ATEX certificate upon request."},{"question":"How do I get current pricing and availability for 3RB2026-1RB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2026-1RB0","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/3RB2026-1RB0 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}}