{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-0GD23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-0GD23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-0GD23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-0GD23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-0GD23-0AK6 non-fused motor starter, size S0, direct starter, 690 V rated, 180 W at 400 V, Class 10, 45 mm width, 155 mm depth, 260 mm height.","salesMarkdown":"## SIRIUS 3RA2 non-fused motor starter — size S0, direct start, 690 V rated The Siemens 3RA2125-0GD23-0AK6 is a SIRIUS non-fused motor starter, size S0, configured as a direct starter. It ships with a 3RT2023-1AK60 contactor, a 3RV2011-0GA15 circuit-breaker, a 3RA2921-1AA00 link module, and an 8US1251-5NT10 busbar adapter — the BOM is self-contained for a single motor feeder. Rated voltage is 690 V, with a power rating of 180 W at 400 V and 250 W at 690 V. The overload release is thermal bimetallic, Class 10 trip class, and the short-circuit release is magnetic — this combination provides motor protection against both sustained overloads and bolted faults. ## Mounting, orientation, and panel integration Mounting is by snapping onto 60 mm busbar systems in a vertical orientation only. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards. The zero backward clearance means the unit sits flush against the back panel — no extra depth needed behind the DIN rail. The wide storage range suits unheated warehouses or container shipping. ## Wire sizing and auxiliary contact provision Main contact wire range: stranded 1 to 10 mm², or 2x (2.5 to 6 mm²). AWG equivalents are 2x (16 to 12) or 2x (14 to 8). The dual-conductor capability allows paralleling smaller wires for higher ampacity without changing the terminal. The product extension for auxiliary switches is available — the feeder can accept add-on contact blocks without modifying the base unit. Sourced through independent distribution channels. No stock-holding claim is made; each order is quoted individually.","metaTitle":"Siemens 3RA2125-0GD23-0AK6 SIRIUS Motor Starter, 690 V","metaDescription":"Siemens SIRIUS 3RA2125-0GD23-0AK6 non-fused motor starter, size S0, direct starter, Class 10 thermal overload, 690 V rated, 180 W at 400 V.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"45 mm","title":"3RA2125-0GD23-0AK6","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 0.45-0.63A 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 400 V rated value":"180 W","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"180 W","at 60 Hz rated value":"96 ... 132 V","at 690 V rated value":"250 W","Design Of The Product":"direct starter","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":"3RV2011-0GA15","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":"0.6 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":"8.19 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":"0.45 ... 0.63 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/a55d07bbfb15e24acd0817220c1049f4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=338976&mlfb=3RA2125-0GD23-0AK6"},"ai":{"faq":[{"question":"What is the depth of 3RA2125-0GD23-0AK6?","answer":"The depth is 155 mm. Combined with the 45 mm width and 260 mm height, the unit fits a standard 60 mm busbar system with zero backward clearance needed."},{"question":"What subcomponents are supplied with 3RA2125-0GD23-0AK6?","answer":"The starter ships with a 3RT2023-1AK60 contactor, a 3RV2011-0GA15 circuit-breaker, a 3RA2921-1AA00 link module, and an 8US1251-5NT10 busbar adapter. The BOM is complete for a single motor feeder."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-0GD23-0AK6","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/3RA2125-0GD23-0AK6 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}}