{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1DD23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1DD23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1DD23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1DD23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-1DD23-0AK6 non-fused motor starter, direct starter design, size S0 load feeder, CLASS 10 thermal overload, rated 690 V AC-3, snaps onto 60 mm busbar systems.","salesMarkdown":"The Siemens SIRIUS 3RA2125-1DD23-0AK6 is a non-fused motor starter in a direct starter design — a factory-assembled combination of a contactor and a thermal overload relay in one package, sized as a size S0 load feeder. It ships with the contactor 3RT2023-1AK60 and the link module 3RA2921-1AA00 integrated, so it arrives ready to wire into a motor branch circuit without separate component selection. Rated for AC-3 switching duty up to 690 V, this starter handles motor loads at common line voltages: 1 100 W at 400 V, 1 500 W at 500 V, and 2 hp at 575/600 V. The 690 V ceiling covers most global industrial supply voltages including 400/480/600 V three-phase networks. This starter is designed for snapping onto 60 mm busbar systems — the standard metric busbar pitch found across European and many Asian panel builds. Mounting position is vertical only, with clearances: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, and 0 mm backward. That zero backward clearance means it sits flush against the mounting surface, so plan for front-access wiring only. Dimensions are 260 mm height × 45 mm width × 155 mm depth — the width is a single 45 mm module, so it occupies one position on the busbar. The depth of 155 mm includes the contactor and overload assembly; verify enclosure depth before committing the panel layout.","metaTitle":"Siemens 3RA2125-1DD23-0AK6 SIRIUS Non-Fused Motor Starter","metaDescription":"Siemens SIRIUS 3RA2125-1DD23-0AK6 non-fused motor starter, direct starter design, CLASS 10 trip, 690 V AC-3, snaps onto 60 mm busbar.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"45 mm","title":"3RA2125-1DD23-0AK6","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 2.2-3.2A 110/120VAC 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 230 V rated value":"0.25 hp","at 400 V rated value":"1 100 W","at 480 V rated value":"2.8 A","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"1 500 W","at 60 Hz rated value":"96 ... 132 V","at 600 V rated value":"3.16 A","Design Of The Product":"direct starter","at 110/120 V rated value":"0.1 hp","at 200/208 V rated value":"0.5 hp","at 220/230 V rated value":"0.75 hp","at 460/480 V rated value":"1.5 hp","at 575/600 V rated value":"2 hp","Of The Supplied Contactor":"3RT2023-1AK60","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":"3RV2011-1DA15","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":"2.7 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":"41.6 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":"2.2 ... 3.2 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/ef5b70cf71d184ce187280362be53a91.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=251651&mlfb=3RA2125-1DD23-0AK6"},"ai":{"faq":[{"question":"Is 3RA2125-1DD23-0AK6 compatible with 60 mm busbar systems?","answer":"Yes — it is designed for snapping onto 60 mm busbar systems, the standard metric pitch. Mounting position is vertical, with the clearances specified in the datasheet."},{"question":"Where can I buy 3RA2125-1DD23-0AK6?","answer":"This part is sourced to order; availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1DD23-0AK6","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/3RA2125-1DD23-0AK6 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}}