{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2115-1FD15-1BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2115-1FD15-1BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2115-1FD15-1BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2115-1FD15-1BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2115-1FD15-1BB4 non-fused motor starter, size S00, direct starter design, CLASS 10 thermal bimetallic overload, 690 V AC-3 maximum, 24 V coil, 45 mm width, 200 mm height, 155.1 mm depth.","salesMarkdown":"## CLASS 10 trip curve and motor protection The 3RA2115-1FD15-1BB4: The CLASS 10 trip class means the overload relay must trip within 10 seconds at 600% of the set current, per IEC 60947-4-1. This is the standard for standard-duty motor starting — it allows the inrush to pass during acceleration but protects the motor winding if the rotor stalls. The overload element is thermal bimetallic, so the trip time follows an I²t curve that tracks the motor's thermal state. For audit purposes, this is the same protection principle used across the SIRIUS S00 feeder family. ## Rated for the common line voltages At 400 V rated value the starter is rated for 1500 W; at 460/480 V it is rated for 3 hp. The maximum AC-3 operating voltage is 690 V, which covers 575/600 V systems at 3 hp and 4.55 A at 600 V. Confirm the control circuit is 24 VDC, not 120 VAC, before wiring. ## Pre-assembled — what is in the box This is a factory-assembled direct starter: it ships with the 3RT2015-1BB41 contactor, the 3RA1921-1DA00 link module, and the 8US1251-5DS10 busbar adapter. No separate ordering of contactor and overload — one order code, one assembly. The supplied contactor is size S00, matching the load feeder size. The busbar adapter snaps onto 60 mm busbar systems, which is the standard metric spacing for panelboard distribution. ## Mounting and panel clearance Mounting position is vertical only. Clearance requirements: 20 mm upwards, 10 mm downwards, 9 mm at the side, and 0 mm forwards or backwards. The 45 mm width and 155.1 mm depth fit a standard S00 footprint on DIN rail or busbar. This covers common motor leads up to 4 AWG.","metaTitle":"Siemens 3RA2115-1FD15-1BB4 SIRIUS Motor Starter, CLASS 10","metaDescription":"Siemens 3RA2115-1FD15-1BB4 SIRIUS non-fused motor starter, size S00, CLASS 10 thermal overload, 690 V AC-3 max. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"155.1 mm","Width":"45 mm","title":"3RA2115-1FD15-1BB4","Height":"200 mm","Upwards":"20 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"9 mm","Rated Value":"24 V","description":"Fuseless motor starter Direct start 600VAC Size S00 3.5-5A 24V DC screw connection For snapping onto 60 mm busbar systems Type of coordination 1 1NO+1NC (MSP) 1NO (contactor)","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"for snapping onto 60 mm busbar systems","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"1","Degree Of Pollution":"3","Product Designation":"non-fused motor starter 3RA2","Size Of Load Feeder":"S00","at 230 V rated value":"0.5 hp","at 400 V rated value":"1 500 W","at 480 V rated value":"4.8 A","at 500 V rated value":"2 200 W","at 600 V rated value":"4.55 A","Design Of The Product":"direct starter","at 110/120 V rated value":"0.17 hp","at 200/208 V rated value":"1 hp","at 220/230 V rated value":"1 hp","at 460/480 V rated value":"3 hp","at 575/600 V rated value":"3 hp","Of The Supplied Contactor":"3RT2015-1BB41","For Main Contacts Stranded":"0.5 ... 4 mm², 2x (0.75 ... 2.5 mm²)","Of The Supplied Link Module":"3RA1921-1DA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","Design Of The Overload Release":"thermal (bimetallic)","Of The Supplied Busbar Adapter":"8US1251-5DS10","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","at AWG cables for main contacts":"2x (20 ... 16), only for contactor 2x (18 ... 14), 2x 12","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2011-1FA15","Product Extension Auxiliary Switch":"Yes","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"2","shock resistance according to IEC 60068-2-27":"6g / 11 ms","at 400 V according to IEC 60947-4-1 rated value":"153 000 A","operational current at AC-3 at 400 V rated value":"3.6 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"30 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"65 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3.5 ... 5 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e4ba18a885a2fd01efe4aac23db35b28.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=70159&mlfb=3RA2115-1FD15-1BB4"},"ai":{"faq":[{"question":"What is the trip class and what does it mean for my motor?","answer":"This is suitable for standard motor starting applications where the inrush current clears before the protection window closes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2115-1FD15-1BB4","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/3RA2115-1FD15-1BB4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}