{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-0JA23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-0JA23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-0JA23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-0JA23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-0JA23-0AK6 non-fused motor starter, direct starter, size S0, 250 W at 400 V, Class 10, 45 mm width, snap-on DIN rail.","salesMarkdown":"The 3RA2125-0JA23-0AK6 is a SIRIUS non-fused direct starter, size S0 load feeder, combining a contactor and thermal-magnetic overload in one package. The thermal bimetallic overload release (Trip Class 10) protects motors against sustained overloads, while the magnetic short-circuit trip handles fault currents — no external fuses needed for the motor branch. Rated motor power: 250 W at 400 V, 370 W at 500 V, 550 W at 690 V, and 0.5 hp at 575/600 V. The 45 mm width (size S0) fits standard 45 mm DIN-rail slots or screw-mount with the push-in lug; vertical mounting only. Coil voltage range is 88...121 V at 50 Hz and 96...132 V at 60 Hz — confirm the control supply matches before wiring. Main contact wire range: 1...10 mm² stranded, or 2x (2.5...6 mm²); AWG 2x (16...12) or 2x (14...8). ## Supplied components — what's in the box The starter ships with the contactor (3RT2023-1AK60), circuit-breaker (3RV2011-0JA15), and link module (3RA2921-1AA00) pre-assembled. The circuit-breaker size is S00; the auxiliary switch extension is available as an add-on.","metaTitle":"Siemens 3RA2125-0JA23-0AK6 SIRIUS Motor Starter","metaDescription":"Siemens 3RA2125-0JA23-0AK6 SIRIUS non-fused motor starter, 250 W at 400 V, Class 10, 45 mm wide. Active production, quoted to order. Request a quote.","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":"3RA2125-0JA23-0AK6","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 0.7-1A 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 400 V rated value":"250 W","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"370 W","at 60 Hz rated value":"96 ... 132 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":"3RT2023-1AK60","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":"3RV2011-0JA15","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/588084fe5d0d47637d27b1b6ebc6cf5d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=234906&mlfb=3RA2125-0JA23-0AK6"},"ai":{"faq":[{"question":"Where can I buy 3RA2125-0JA23-0AK6 and get a price?","answer":"Submit an RFQ for current pricing and lead time; no stock-holding claim, availability confirmed at quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-0JA23-0AK6","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/3RA2125-0JA23-0AK6 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}}