{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-0JD23-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-0JD23-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-0JD23-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-0JD23-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-0JD23-0AP6 non-fused motor starter, S0 size, direct starter, 250 W at 400 V, Class 10, 690 V rated, 50/60 Hz.","salesMarkdown":"## SIRIUS 3RA2 non-fused motor starter The Siemens 3RA2125-0JD23-0AP6 is a SIRIUS non-fused motor starter, a direct starter in size S0. It integrates a contactor, a thermal bimetallic overload relay, and a magnetic short-circuit trip into a single unit that snaps onto 60 mm busbar systems. Rated for 250 W at 400 V, 370 W at 500 V, and 550 W at 690 V, with a 0.5 hp rating at 575/600 V, this starter covers small motor loads across common industrial voltages. The control supply accepts 176...242 V at 50 Hz and 192...264 V at 60 Hz. ## What comes in the box This order code ships as a fully assembled unit that includes the contactor (3RT2023-1AP60), the link module (3RA2921-1AA00), the circuit-breaker (3RV2011-0JA15), and a busbar adapter (8US1251-5NT10). No separate sourcing of these sub-components is needed. Main contact wiring accepts 1...10 mm² stranded or 2x (2.5...6 mm²), with AWG equivalents of 2x (16...12) or 2x (14...8). ## Panel fit and clearances Dimensions are 45 mm wide, 260 mm high, and 155 mm deep. Mounting is vertical only. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the sides, and 0 mm backwards — so the back can sit flush against the panel backplate. The S0 size and 45 mm width mean it occupies a single 45 mm slot on a DIN rail or busbar system, matching the footprint of the S00 circuit-breaker size used in this assembly. ## Environmental and compliance Rated for pollution degree 3, meaning it's suitable for industrial environments where conductive pollution or dry non-conductive pollution that becomes conductive due to condensation occurs.","metaTitle":"Siemens 3RA2125-0JD23-0AP6 SIRIUS Motor Starter","metaDescription":"Siemens SIRIUS 3RA2125-0JD23-0AP6 non-fused motor starter, 250 W at 400 V, Class 10, 690 V rated. S0 size, direct starter. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"45 mm","title":"3RA2125-0JD23-0AP6","Height":"260 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 600VAC Size S0 0.7-1A 220/240VAC 50/60HZ screw connection For snapping onto 60 mm busbar systems Type of coordination 2 IQ = 150 KA Also full fills 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":"for snapping onto 60 mm busbar systems","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 400 V rated value":"250 W","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"370 W","at 60 Hz rated value":"192 ... 264 V","at 690 V rated value":"550 W","Design Of The Product":"direct starter","at 575/600 V rated value":"0.5 hp","Of The Supplied Contactor":"3RT2023-1AP60","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","Design Of The Overload Release":"thermal (bimetallic)","Of The Supplied Busbar Adapter":"8US1251-5NT10","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":"3RV2011-0JA15","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":"7.2 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","operational current at AC-3 at 400 V rated value":"0.85 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":"13 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":"0.7 ... 1 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/45305055b0aca0da6590c286caf7c00b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=184238&mlfb=3RA2125-0JD23-0AP6"},"ai":{"faq":[{"question":"What is the 3RA2125-0JD23-0AP6 used for?","answer":"It is a non-fused direct motor starter for small three-phase motors up to 250 W at 400 V, 370 W at 500 V, or 550 W at 690 V. It combines a contactor, overload relay, and short-circuit protection into one unit that snaps onto a 60 mm busbar system."},{"question":"What sub-components are included with the 3RA2125-0JD23-0AP6?","answer":"The assembly includes contactor 3RT2023-1AP60, link module 3RA2921-1AA00, circuit-breaker 3RV2011-0JA15, and busbar adapter 8US1251-5NT10."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-0JD23-0AP6","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/3RA2125-0JD23-0AP6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}