{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2015-1SB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2015-1SB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2015-1SB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2015-1SB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2015-1SB0, Class 10E, 690 V AC-3, 1 NO + 1 NC auxiliary contacts, screw terminals, IP20, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2015-1SB0 is a SIRIUS solid-state overload relay — a Class 10E device that protects three-phase motor circuits against overcurrent and phase failure without the mechanical wear of a bimetallic strip. It mounts directly onto a SIRIUS S00 contactor (contactor mounting, not DIN rail), saving panel space and simplifying the wiring between the contactor and the overload block. Rated for a maximum operating voltage of 690 V AC-3 and with a surge voltage resistance of 6 kV, it handles standard 400 V and 480 V motor feeds with headroom. The relay provides one normally-open and one normally-closed auxiliary contact for status feedback or trip signalling back to the PLC. The switching current capability varies with the control voltage: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V, among other points. These are the make/break ratings for the auxiliary contacts — useful when selecting the PLC input or relay coil the overload relay will drive directly. With IP20 protection on the front and screw-type terminals for both main and control circuits, it is suited for installation inside a standard IP54 or higher enclosure. The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) means it can be used in Zone 2 gas or Zone 22 dust areas when paired with an appropriate upstream protection device. This overload relay is designed for three-phase motor protection in industrial control panels — conveyors, pumps, compressors, fans, and machine tools. The SIRIUS S00 contactor frame size (the relay mates with contactors like 3RT7014 or 3RT7016) keeps the motor starter compact, typically occupying a 45 mm wide footprint on the panel subplate.","metaTitle":"Siemens 3RB2015-1SB0 SIRIUS solid-state overload relay, Clas","metaDescription":"Siemens SIRIUS 3RB2015-1SB0 solid-state overload relay, Class 10E, 690 V max, 1 NO + 1 NC aux, ATEX, IP20. Active production, factory-fresh and fully warrantied.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"73 mm","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","Mounting Type":"Contactor mounting","lifecycle_stage":"current","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","Ambient Temperature During Storage":"-40 ... +80 °C","Relative Humidity During Operation":"100 %","Ambient Temperature During Operation":"-25 ... +60 °C","Ambient Temperature During Transport":"-40 ... +80 °C","Surge Voltage Resistance Rated Value":"6 kV","reference code acc. to DIN EN 81346-2":"F","Number Of Poles For Main Current Circuit":"3","For Auxiliary And Control Current Circuit":"screw-type terminals","number of CO contacts for auxiliary contacts":"0","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","operating voltage at AC-3 rated value maximum":"690 V","Size Of Contactor Can Be Combined Company-Specific":"S00","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Type Of Connectable Conductor Cross-Sections For Main Contacts Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Function Removable Terminal For Auxiliary And Control Circuit":"Yes","Type Of Connectable Conductor Cross-Sections For Auxiliary Contacts Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Adjustable Pick-Up Value Current Of The Current-Dependent Overload Release":"3 ... 12 A","power loss [W] for rated value of the current at AC in hot operating state":"0.05 W","type of connectable conductor cross-sections at AWG conductors for main contacts":"2x (18 ... 14)","power loss [W] for rated value of the current at AC in hot operating state per pole":"0.02 W","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (20 ... 14)","Type Of Connectable Conductor Cross-Sections For Main Contacts Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Type Of Connectable Conductor Cross-Sections For Auxiliary Contacts Finely Stranded With Core End Processing":"0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$243.21","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=385030&mlfb=3RB2015-1SB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2015-1SB0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this overload relay?","answer":"Class 10E trip curve, maximum operating voltage 690 V AC-3, surge voltage resistance 6 kV, one NO and one NC auxiliary contact, IP20 front protection, ATEX Ex II (2) GD approved, and operating temperature range -25 to +60 °C."},{"question":"Does the 3RB2015-1SB0 mount on a DIN rail?","answer":"No, it is designed for contactor mounting — it snaps directly onto a SIRIUS S00 contactor (e.g., 3RT7014 or 3RT7016 series). It does not occupy a separate DIN rail slot."},{"question":"What compliance documentation is available for this part?","answer":"The relay carries ATEX certification (PTB 06 ATEX 3001 Ex II (2) GD) and meets IEC 61000-4-2 ESD immunity (6 kV contact / 8 kV air discharge). Standard Siemens declarations of conformity (CE, UKCA) and the ATEX certificate are provided with the shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2015-1SB0","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/3RB2015-1SB0 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}}