{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2015-2RB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2015-2RB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2015-2RB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2015-2RB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2015-2RB0, CLASS 20E trip, 690 V AC-3 max, ATEX Ex II (2) GD, IP20, contactor mounting.","salesMarkdown":"The Siemens 3RB2015-2RB0 is a SIRIUS solid-state overload relay — it protects motors by monitoring current and tripping on overload, but does it without the moving bimetal strip of a traditional thermal relay. It mounts directly onto a contactor (contactor mounting), saving DIN-rail space inside the panel. The enclosure is IP20 — finger-safe for the panel interior, but not for washdown environments. The main circuit terminals accept solid conductors from 0.5 to 4 mm² (or 2× 0.5 to 2.5 mm²), and AWG equivalents 2× 18 to 14. Screw-type terminals are used for the main current circuit. The auxiliary contact ratings are given at several voltages: 4 A at 120 V, 3 A at 230 V, 2 A at 24 V, and 0.55 A at 60 V. These are the switching capacities for the signal contacts; the 120 V and 230 V figures are the ones you'll use for a PLC input or contactor coil feedback. Shock resistance is 15g for 11 ms — robust enough for machine-mounted applications near presses or conveyors. EMC immunity is specified: surge voltage resistance at 6 kV, and burst immunity at 2 kV on power ports and 1 kV on signal ports (severity level 3 per IEC 61000-4-4). That means it will hold its trip accuracy in electrically noisy industrial environments without nuisance tripping. This relay is for motor protection in control panels — the SIRIUS line is Siemens' standard modular system for motor feeders. The CLASS 20E trip curve matches general-purpose induction motors driving centrifugal pumps, fans, compressors, and light conveyors. It's not for high-inertia loads that need a longer trip class (CLASS 30) or for submersible pumps that need a faster one (CLASS 10). The ATEX certification (PTB 06 ATEX 3001 Ex II (2) GD) means it can be used in the control circuit of equipment installed in Zone 2 gas or Zone 22 dust areas — the relay itself sits in the safe area but protects motors in the hazardous zone. Because it's a current-production Siemens SIRIUS component, lead times are standard for the line — no broker or surplus channel required. Mounts directly onto the contactor — no DIN rail needed for the relay itself, though the contactor will be DIN-rail mounted. Clearances: 0 mm upwards, forwards, and backwards; 6 mm at the side. That means it can be packed tight against other components above, below, and behind, but needs 6 mm lateral breathing room.","metaTitle":"Siemens 3RB2015-2RB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB2015-2RB0 SIRIUS solid-state overload relay, CLASS 20E trip, 690 V max, ATEX, IP20. Active production, 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","Maximum":"2 000 m","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 20E","At The Side":"6 mm","On The Front":"IP20","Mounting type":"Contactor mounting","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","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","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","at AWG conductors for main contacts":"2x (18 ... 14)","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"F","at AC in hot operating state per pole":"0.02 W","With Degree Of Pollution 3 Rated Value":"690 V","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","at AWG conductors for auxiliary contacts":"2x (20 ... 14)","For Auxiliary And Control Current Circuit":"screw-type terminals","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","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","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A","Adjustable pick-up value current of the current-dependent overload release":"0.1 ... 0.4 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=327059&mlfb=3RB2015-2RB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2015-2RB0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does this relay carry?","answer":"It carries ATEX certification PTB 06 ATEX 3001 Ex II (2) GD for use in hazardous-area motor circuits. EMC immunity is specified per IEC 61000-4-4 (burst) and surge voltage resistance at 6 kV. The reference code per DIN EN 81346-2 is F."},{"question":"What are the key ratings for fit?","answer":"CLASS 20E trip curve, maximum AC-3 voltage 690 V, auxiliary contact ratings of 4 A at 120 V and 3 A at 230 V, operating temperature -25 to +60 °C, IP20 enclosure, and contactor mounting."},{"question":"What wire sizes does the main circuit accept?","answer":"Solid conductors from 0.5 to 4 mm², or 2× 0.5 to 2.5 mm². AWG equivalents are 2× 18 to 14. Terminals are screw-type."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2015-2RB0","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/3RB2015-2RB0 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}}