{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2015-1NB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2015-1NB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2015-1NB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2015-1NB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2015-1NB0, Class 10E, ATEX Ex II (2) GD, IP20 front, contactor-mount, screw terminals.","salesMarkdown":"The Siemens 3RB2015-1NB0 is a SIRIUS solid-state overload relay — no bimetals to drift, no heater packs to swap. It protects motors against overload and phase loss by monitoring current through the main circuit and tripping when the thermal model hits the Class 10E curve. That matters when you're paying your own electric bill and can't afford a false shutdown on a conveyor. This relay mounts directly onto a contactor — no DIN rail needed. The 45 mm width and 64 mm height keep it compact inside a panel, and the 73 mm depth means it won't crowd the gland plate. It can sit in any orientation, which helps when you're squeezing it into a tight enclosure. The ATEX Ex II (2) GD approval (PTB 06 ATEX 3001) means it's allowed in Zone 2 gas and Zone 22 dust areas when installed per the certificate. That's a real differentiator for grain elevators, paint booths, or chemical mixing lines. ## Switching and wiring The auxiliary contacts handle a range of control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V, among others. That covers most PLC output cards and control transformers without needing an interposing relay. Main circuit terminals accept solid wire from 0.5 to 4 mm², or two conductors up to 2.5 mm² each. The screw-type terminals are standard for panel wiring — no special tooling needed. Auxiliary and control circuits also use screw terminals.","metaTitle":"Siemens 3RB2015-1NB0 SIRIUS solid-state overload relay, Clas","metaDescription":"Siemens 3RB2015-1NB0 SIRIUS solid-state overload relay, Class 10E trip, ATEX Ex II (2) GD, IP20 front, contactor-mount. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"64 mm","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","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","On The Front":"IP20","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 Auxiliary Contacts":"0","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"0.05 W","at AWG cables for main contacts":"2x (18 ... 14)","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 AC in hot operating state per pole":"0.02 W","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 NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","with degree of pollution 3 at AC rated value":"690 V","electrostatic discharge acc. to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","field-based interference acc. to IEC 61000-4-3":"10 V/m","Size Of Contactor Can Be Combined Company-Specific":"S00","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV (line to earth) corresponds to degree of severity 3","Removable Terminal For Auxiliary And Control Circuit":"Yes","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","type of connectable conductor cross-sections at AWG cables for auxiliary contacts":"2x (20 ... 14)","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.32 ... 1.25 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=46923&mlfb=3RB2015-1NB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2015-1NB0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RB2015-1NB0?","answer":"The 3RB2015-1NB0 is a solid-state overload relay; the closest functional peer from the same SIRIUS family would be a comparable Class 10E unit with contactor-mount and ATEX approval, but the exact replacement depends on your current setting range and auxiliary contact configuration."},{"question":"Will 3RB2015-1NB0 drop into a panel specified for 3RT1016-1AR11?","answer":"The 3RB2015-1NB0 mounts directly on a contactor, not on DIN rail. If the panel was built around a 3RT1016-1AR11 contactor, this relay is designed to snap onto that contactor without extra hardware — no rewiring of the main circuit needed, provided the terminal sizes match."},{"question":"What compliance documentation does Siemens provide for 3RB2015-1NB0?","answer":"The relay carries ATEX Ex II (2) GD certification (PTB 06 ATEX 3001) and is designed to meet IEC 60947-4-1 for overload relays. RoHS and REACH declarations are typically included in the manufacturer's documentation package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2015-1NB0","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/3RB2015-1NB0 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}}