{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2115-0KA16-2BB4-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2115-0KA16-2BB4-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RA2115-0KA16-2BB4-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2115-0KA16-2BB4-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2115-0KA16-2BB4-ZX95 direct-on-line motor starter, size S00, 1.25 A AC-3 at 400 V, 24 V DC coil, Class 10 thermal bimetallic overload, screw terminals, 45 mm width, DIN rail mount.","salesMarkdown":"## 1.25 A AC-3 at 400 V — the motor-switching rating that governs fit The 3RA2115-0KA16-2BB4-ZX95: That 1.25 A figure is the current the starter's contactor and overload block are designed to switch and protect continuously in a motor circuit, not a resistive-heater rating. The 24 V DC coil is the control voltage the starter expects from the PLC or relay output — confirm your control transformer or power supply delivers clean 24 V DC at the coil inrush before wiring. ## Class 10 thermal overload — what it means for motor protection The overload release is thermal bimetallic, trip class 10. For motors with longer acceleration times (high-inertia loads like centrifuges or crushers), a Class 20 or 30 relay would be needed; this starter is sized for general-purpose drives. The supplied contactor is a 3RT2016-1BB42, and the link module is 3RA1921-1DA00 — the assembly ships as a coordinated pair, so the thermal and magnetic curves are matched from the factory. No separate sizing exercise between contactor and overload. ## DIN rail mounting and panel clearances The 45 mm width is a single 9 mm module equivalent — on a standard DIN rail, 10 starters fit per 450 mm section. Depth is 97 mm, height 167 mm. Clearance requirements: 50 mm above, 20 mm forward, 10 mm below, 20 mm at the sides, and zero clearance behind. The 50 mm upward gap is the critical one — it allows hot air from the bimetallic overload to rise without recirculating into adjacent units. Crowding that clearance raises the effective ambient temperature and derates the trip curve.","metaTitle":"Siemens 3RA2115-0KA16-2BB4-ZX95 SIRIUS Motor Starter","metaDescription":"Siemens SIRIUS 3RA2115-0KA16-2BB4-ZX95 direct-on-line motor starter, size S00, 1.25 A at 400 V AC-3, 24 V DC coil, Class 10 thermal overload, DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"97 mm","Width":"45 mm","title":"3RA2115-0KA16-2BB4-ZX95","Height":"167 mm","Upwards":"50 mm","Forwards":"20 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"20 mm","Rated Value":"24 ... 24 V","description":"Load feeder fuseless, Direct-on-line starting 400 V AC, Size S00 0.9...1.25 A 24 V DC screw terminal for installation on standard mounting rail Type of coordination 2, Iq = 150 kA (also fulfills type of coordination 1) 1 NC (contactor) 1 NO+1 NC (circuit breaker, transverse) Reusable packaging contains 24 units","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Mounting Position":"vertical","PROFIsafe protocol":"No","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Product Designation":"Direct (on-line) starter","Size Of Load Feeder":"S00","PROFINET IO protocol":"No","at 400 V rated value":"370 kW","at 480 V rated value":"1.25 A","at 600 V rated value":"1.25 A","Design Of The Product":"for standard rail or screw mounting","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at 460/480 V rated value":"0.75 hp","at 575/600 V rated value":"0.75 hp","Of The Supplied Contactor":"3RT2016-1BB42","Of The Supplied Link Module":"3RA1921-1DA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","at AC-3 at 400 V rated value":"1.25 A","at AC-3e rated value maximum":"690 V","at AC-3e at 400 V rated value":"1.25 A","Design Of The Overload Release":"thermal (bimetallic)","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2011-0KA15","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Without Load Current Share Typical":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"2.7 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","reference code according to IEC 81346-2:2019":"Q","shock resistance according to IEC 60068-2-27":"6g / 11 ms","Type Of Voltage Of The Control Supply Voltage":"DC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","Mechanical Service Life (Operating Cycles) Of Contactor Typical":"30 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"16 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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/24ae8abc28d81ee1918dbb0a00fc9402.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=175383&mlfb=3RA2115-0KA16-2BB4-ZX95"},"ai":{"faq":[{"question":"What is the AC-3 current rating of 3RA2115-0KA16-2BB4-ZX95 at 400 V?","answer":"The maximum AC-3 voltage is 690 V."},{"question":"What clearance is needed above and around this starter on the DIN rail?","answer":"Siemens specifies 50 mm clearance above, 20 mm forward, 10 mm below, 20 mm at the sides, and zero clearance behind. The 50 mm upward gap is the most restrictive — it prevents heat buildup from the bimetallic overload relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2115-0KA16-2BB4-ZX95","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/3RA2115-0KA16-2BB4-ZX95 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}}