{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-4EA27-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-4EA27-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-4EA27-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-4EA27-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-4EA27-0AP6 non-fused motor starter, S0 frame, direct starter design, 15 kW at 400 V AC-3, Class 10 thermal bimetallic overload, 45 x 97.1 x 193.1 mm.","salesMarkdown":"The 3RA2125-4EA27-0AP6 is a SIRIUS non-fused motor starter in the S0 frame size, built as a direct starter with a thermal bimetallic overload relay (Class 10 trip). Current ratings of 27 A at both 480 V and 600 V confirm the contactor and overload are sized for the same motor full-load current across common North American voltage levels. ## Snap-on DIN rail or screw-mount — integration notes Snap-mounted to DIN rail or screw-mounted with an additional push-in lug; mounting position is vertical only, with 30 mm clearance upward, 10 mm forward and downward, and 9 mm at the side — plan the enclosure layout around these minimums. Dimensions are 45 mm wide, 97.1 mm deep, 193.1 mm high — the S0 footprint is common across the SIRIUS 3RA2 range, so panel cutouts and busbar positions carry over if you swap between S0 starters. The unit ships with the contactor (3RT2027-1AP60) and link module (3RA2921-1AA00) pre-assembled — no field wiring between contactor and overload; just land the motor leads and control voltage.","metaTitle":"Siemens 3RA2125-4EA27-0AP6 SIRIUS Motor Starter","metaDescription":"Siemens SIRIUS 3RA2125-4EA27-0AP6 non-fused motor starter, 15 kW at 400 V AC-3, Class 10 thermal overload, S0 frame. Active 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":"3RA2125-4EA27-0AP6","Height":"193.1 mm","Upwards":"30 mm","Forwards":"10 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"9 mm","Rated Value":"690 V","description":"FUSELESS MOTOR STARTER DIRECT START 600V AC SZ S0 27-32A 220/240V AC 50/60HZ SCREW CONNECTION FOR SCREW MOUNTING OR 35 MM RAIL-MOUNTING TYPE OF COORDINATION 2 IQ = 150 KA ALSO FULFILLS TYPE OF COORDINATION 1 1NO+1NC (MSP) 1NO+1NC (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":"S0","at 230 V rated value":"5 hp","at 400 V rated value":"15 000 W","at 480 V rated value":"27 A","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"18 500 W","at 60 Hz rated value":"192 ... 264 V","at 600 V rated value":"27 A","Design Of The Product":"direct starter","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"20 hp","at 575/600 V rated value":"25 hp","Of The Supplied Contactor":"3RT2027-1AP60","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S0","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 (16 ... 12), 2x (14 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4EA15","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"9.4 VA","number of NC contacts for auxiliary contacts":"2","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","operational current at AC-3 at 400 V rated value":"29 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Inductive Power Factor With The Holding Power Of The Coil":"0.28","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"416 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":"27 ... 32 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 6 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fec05f06242d6cd16db3555c49b36d5c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=110593&mlfb=3RA2125-4EA27-0AP6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-4EA27-0AP6","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/3RA2125-4EA27-0AP6 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}}