{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2115-0KA15-1BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2115-0KA15-1BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2115-0KA15-1BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2115-0KA15-1BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2115-0KA15-1BB4 non-fused motor starter, size S00, direct starter, 370 W at 400 V AC-3, 24 V DC coil, Class 10, thermal bimetallic overload, magnetic short-circuit trip, supplied with contactor 3RT2015-1BB41 and link module 3RA1921-1DA00.","salesMarkdown":"## Sizing a direct starter for a 370 W motor at 400 V The 3RA2115-0KA15-1BB4: This SIRIUS 3RA2 non-fused motor starter is a pre-assembled direct starter combining a contactor, thermal overload relay, and magnetic short-circuit trip in one unit — size S00 frame. At 400 V AC-3 duty it's rated for 370 W motor output, and at 690 V AC-3 it handles up to 750 W. The 24 V DC coil matches standard PLC control voltage without an interposing relay. The magnetic short-circuit trip clears faults before the contactor welds, so the upstream feeder breaker doesn't need to coordinate down to the motor locked-rotor current. ## Panel fit and clearance envelope The unit measures 45 mm wide by 167.2 mm high by 97.1 mm deep — size S00 footprint. Mounting is snap-on to 35 mm DIN rail or screw-mount with the additional push-in lug. Vertical mounting position is specified; the clearance requirements are 20 mm upward, 10 mm downward, 9 mm at the sides, and zero forward or backward — so it fits tight against the back panel. AWG equivalents are 2× (20-16) and 2× (18-14) for the contactor side. The supplied link module 3RA1921-1DA00 bridges the contactor to the circuit-breaker — no extra bus bars needed. ## Temperature range and storage logistics Operating ambient is -20 to +60 °C; storage range is -50 to +80 °C; transport range is -55 to +80 °C. The -55 °C transport floor matters for cold-chain shipments — no special heated packaging needed for standard freight. Pollution degree 3 means it's rated for industrial environments with conductive pollution (condensation, light dust).","metaTitle":"Siemens 3RA2115-0KA15-1BB4 SIRIUS non-fused motor starter","metaDescription":"Siemens SIRIUS 3RA2115-0KA15-1BB4 non-fused motor starter, size S00, 370 W at 400 V AC-3, 24 V coil, Class 10, DIN rail. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"97.1 mm","Width":"45 mm","title":"3RA2115-0KA15-1BB4","Height":"167.2 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 0.9-1.25A 24V DC screw connection For screw mounting Or 35 mm rail-mounting Type of coordination 2 IQ = 150 KA Also full fills 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":"Snap-mounted to DIN rail or screw-mounted with additional push-in lug","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused motor starter 3RA2","Size Of Load Feeder":"S00","at 400 V rated value":"370 W","at 480 V rated value":"1.19 A","at 500 V rated value":"550 W","at 600 V rated value":"1.25 A","at 690 V rated value":"750 W","Design Of The Product":"direct starter","at 460/480 V rated value":"0.5 hp","at 575/600 V rated value":"0.5 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)","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":"3RV2011-0KA15","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","at 500 V according to IEC 60947-4-1 rated value":"100 000 A","at 690 V according to IEC 60947-4-1 rated value":"100 000 A","operational current at AC-3 at 400 V rated value":"1.1 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":"16.25 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":"0.9 ... 1.25 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/c2a6fc8de77850be750ad65f53dfa129.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=13575&mlfb=3RA2115-0KA15-1BB4"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RA2115-0KA15-1BB4?","answer":"The peer MPNs listed (6ES7517-3FP00-0AB0, 6ED1052-1MD08-0BA1, 6AG1052-2FB08-7BA1) are from different product families — a Siemens S7-1500 CPU, a LOGO! controller, and a SIPLUS variant — and are not functional equivalents. No direct second-source cross-reference exists for this non-fused motor starter. The only OEM-specified mating parts are the supplied contactor 3RT2015-1BB41 and circuit-breaker 3RV2011-0KA15."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2115-0KA15-1BB4","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/3RA2115-0KA15-1BB4 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}}