{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2015-2SB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2015-2SB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2015-2SB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2015-2SB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2015-2SB0, trip class 20E, contactor mounting, ATEX Ex II (2) GD, 690 V AC-3 max.","salesMarkdown":"The Siemens 3RB2015-2SB0 is a SIRIUS solid-state overload relay rated for trip class 20E — that means it allows a 20-second thermal trip at 7.2× current setting, sized for motors with longer starting times like fans or high-inertia loads where a class 10 would nuisance-trip on start. It mounts directly onto a contactor (contactor mounting per), so it shares the same DIN-rail or screw-panel footprint as the contactor it protects; no separate enclosure needed for the overload block. The AC-3 rated maximum is 690 V, covering standard 400 V and 480 V motor circuits with headroom for 690 V drives. ## Deployment context This relay sits on the contactor's mounting surface, not on a separate DIN rail — the contactor carries both. The 45 mm width and 64 mm height match the standard SIRIUS contactor frame, so it doesn't add panel depth beyond the contactor's own. Depth is 73 mm, which is the total projection from the mounting surface. Wiring uses screw-type terminals for the main current circuit, accepting 0.5 to 4 mm² solid or 2x 0.5 to 2.5 mm² stranded. The ATEX Ex II (2) GD marking means it's approved for use in Zone 2 gas and Zone 22 dust atmospheres when paired with an appropriate contactor — relevant if the motor is in a classified area.","metaTitle":"Siemens 3RB2015-2SB0 SIRIUS Solid-State Overload Relay, Clas","metaDescription":"Siemens 3RB2015-2SB0 SIRIUS solid-state overload relay, trip class 20E, contactor mounting, ATEX Ex II (2) GD, 690 V AC-3 max. 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":"3 ... 12 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=340737&mlfb=3RB2015-2SB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2015-2SB0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RB2015-2SB0?","answer":"Submit an RFQ against this order code. Pricing and stock are confirmed at quote time through independent distribution; no live inventory figures are published here."},{"question":"What is the trip class and what does it mean for motor protection?","answer":"Trip class 20E means the relay allows 20 seconds at 7.2× current setting before tripping. It's suited for motors with longer acceleration times — fans, centrifuges, or high-inertia loads — where a faster class 10 would trip during start."},{"question":"What compliance documentation does this brand provide for 3RB2015-2SB0?","answer":"The relay carries ATEX Ex II (2) GD approval, burst immunity per IEC 61000-4-4 at severity level 3, and surge voltage resistance rated at 6 kV. CE marking is standard for the SIRIUS series. RoHS and REACH declarations are available from Siemens documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2015-2SB0","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/3RB2015-2SB0 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}}