{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1AA23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1AA23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1AA23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1AA23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-1AA23-0AK6 non-fused motor starter, Size S0, direct starter, thermal bimetallic overload, Class 10, 690 V, 50/60 Hz, snap-on DIN rail.","salesMarkdown":"## Active production — what that means for your BOM line The 3RA2125-1AA23-0AK6: It is part of the SIRIUS product brand family, the non-fused motor starter 3RA2 series, sized S0. ## Thermal overload and trip class — the protection profile The overload release is thermal bimetallic, Trip Class 10. For longer ramp times (centrifuges, high-inertia loads) you would step to Class 20 or 30; this part is not that. Rated voltage is 690 V AC, covering 400 V, 480 V, 600 V, and 690 V line supplies. Power ratings vary by voltage: 550 W at 400 V, 1.1 kW at 690 V, 0.75 hp at 460/480 V and 575/600 V. The 50/60 Hz operating frequency means it works on either mains standard without derating. ## What ships in the box — contactor and link module included This is a pre-assembled direct starter: it ships with the 3RT2023-1AK60 contactor and the 3RA2921-1AA00 link module already integrated. No separate ordering of contactor + overload — it arrives as one unit, wired internally for the direct-on-line start function. The mounting position is vertical only — horizontal mounting would change the thermal trip characteristic. Ambient operating range is -20 to +60 °C, storage -50 to +80 °C. ## Sourcing — quoted to order, no stock-holding claim This is an active Siemens catalog part. We source it through authorized distribution channels against your BOM quantity.","metaTitle":"Siemens 3RA2125-1AA23-0AK6 SIRIUS Motor Starter, Size S0","metaDescription":"Siemens 3RA2125-1AA23-0AK6 SIRIUS non-fused motor starter, Size S0, thermal Class 10 overload, 690 V rated, 550 W at 400 V. 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":"3RA2125-1AA23-0AK6","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 600VAC Size S0 1.1-1.6A 110/120VAC 50/60HZ screw connection For screw mounting Or 35 mm rail-mounting 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":"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":"0.1 hp","at 400 V rated value":"550 W","at 480 V rated value":"1.6 A","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"550 W","at 60 Hz rated value":"96 ... 132 V","at 600 V rated value":"1.3 A","at 690 V rated value":"1 100 W","Design Of The Product":"direct starter","at 460/480 V rated value":"0.75 hp","at 575/600 V rated value":"0.75 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)","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":"3RV2011-1AA15","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":"1.5 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":"20.8 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":"1.1 ... 1.6 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/ee31d595715353b678df1e72922ad92e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=68907&mlfb=3RA2125-1AA23-0AK6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1AA23-0AK6","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/3RA2125-1AA23-0AK6 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}}