{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1HD24-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1HD24-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1HD24-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1HD24-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS non-fused motor starter, 3RA2125-1HD24-0AK6, direct starter, S0 size, Class 10, 7.92 A at 480 V, 690 V max, snaps onto 60 mm busbar.","salesMarkdown":"## SIRIUS 3RA2125-1HD24-0AK6 — Non-Fused Motor Starter, S0, Class 10, 7.92 A at 480 V The Siemens 3RA2125-1HD24-0AK6 is a SIRIUS non-fused motor starter in the S0 size, configured as a direct starter. It ships with a 3RT2024-1AK60 contactor and a 3RA2921-1AA00 link module, plus a thermal bimetallic overload relay. Rated for 690 V maximum at AC-3 duty, the 3RA2125-1HD24-0AK6 delivers 7.92 A at 480 V and 6.33 A at 600 V. It handles motor loads up to 5 hp at 460/480 V and 5 hp at 575/600 V, making it a direct fit for 480 V and 600 V North American line voltages. The 690 V ceiling also covers European 400 V systems with headroom. This starter snaps directly onto 60 mm busbar systems — no separate mounting plate needed. The vertical mounting position is specified; the unit occupies 45 mm width, 260 mm height, and 155 mm depth. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, and 0 mm backward. That 0 mm backward clearance means it can sit flush against a panel backplane, saving enclosure depth. The S0 load feeder size and S00 circuit-breaker size are a matched pair — the overload relay and contactor are coordinated for the S0 frame. Main contact wiring accepts 1 to 10 mm² stranded, or 2x (2.5 to 6 mm²). ## Lifecycle and Sourcing — Current Production The SIRIUS 3RA2 family is widely stocked across the supply chain, but lead times can vary by region and batch size — a quick quote request is the cleanest path to a firm commit for your BOM line.","metaTitle":"Siemens 3RA2125-1HD24-0AK6 SIRIUS Non-Fused Motor Starter","metaDescription":"Siemens 3RA2125-1HD24-0AK6 SIRIUS non-fused motor starter, Class 10, 7.92 A at 480 V, 690 V max. S0 size, 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","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","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":"1 hp","at 400 V rated value":"3 000 W","at 480 V rated value":"7.92 A","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"4 000 W","at 60 Hz rated value":"96 ... 132 V","at 600 V rated value":"6.33 A","Design Of The Product":"direct starter","at 110/120 V rated value":"0.33 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"2 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"5 hp","Of The Supplied Contactor":"3RT2024-1AK60","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":"3RV2011-1HA15","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":"6.5 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":"104 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":"5.5 ... 8 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 6 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$504.76","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=145653&mlfb=3RA2125-1HD24-0AK6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1HD24-0AK6/alternatives.json"},"ai":{"faq":[{"question":"What is the price of 3RA2125-1HD24-0AK6?","answer":"Current pricing for the 3RA2125-1HD24-0AK6 is confirmed at quote time against an RFQ. Submit a request through the storefront for a firm price on your quantity."},{"question":"Is 3RA2125-1HD24-0AK6 compatible with 480V systems?","answer":"Yes. The 3RA2125-1HD24-0AK6 is rated 7.92 A at 480 V and handles motor loads up to 5 hp at 460/480 V. Its maximum AC-3 voltage is 690 V, so 480 V is well within its operating envelope."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1HD24-0AK6","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/3RA2125-1HD24-0AK6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}