{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1DD23-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1DD23-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1DD23-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1DD23-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS non-fused motor starter 3RA2125-1DD23-0AP6, direct starter design, Size S0, Class 10, 690 V rated, for snapping onto 60 mm busbar systems.","salesMarkdown":"The Siemens 3RA2125-1DD23-0AP6 is a SIRIUS non-fused motor starter (product designation: non-fused motor starter 3RA2) built as a direct starter, meaning it combines a contactor and overload relay in one assembly without requiring upstream fuses for short-circuit protection — the integrated circuit-breaker handles that. It is a Size S0 load feeder, which governs the physical envelope and the maximum motor current it can switch; the supplied contactor is a 3RT2023-1AP60 and the supplied link module is a 3RA2921-1AA00. This starter is designed to snap onto 60 mm busbar systems, so it integrates directly into a standard panel busbar layout without extra brackets — common in motor control centers where space per feeder is tight. It is rated for AC-3 duty up to 690 V, which covers the majority of three-phase motor applications up to that line voltage, and carries a Class 10 trip characteristic — meaning the overload relay will trip within 10 seconds at 7.2× the set current, fast enough to protect standard induction motors during a locked-rotor event. At 400 V the starter is rated for 1 100 W (roughly 1.5 hp), and at 480 V it draws 2.8 A — so for a 480 V supply this unit handles motors up to about 1.5 hp (the 460/480 V rating is 1.5 hp). The overload release is thermal (bimetallic), which means it tracks the motor's heating curve naturally and does not require a separate power supply for the trip function — it responds to the current heating the bimetal strip. ## Mounting and environment — built for the panel, not the office Mounting position is vertical only, which is standard for contactor-based starters to ensure proper arc extinction and thermal overload calibration. Operating temperature range is -20 to +60 °C, storage from -50 to +80 °C, and transport from -55 to +80 °C — so it survives the ride in an unheated truck and runs in a hot panel without complaint. Clearances required around the unit: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards — the back can sit flush against the mounting surface.","metaTitle":"Siemens 3RA2125-1DD23-0AP6 SIRIUS non-fused motor starter","metaDescription":"Siemens 3RA2125-1DD23-0AP6 SIRIUS non-fused motor starter, direct starter, Class 10, 690V AC-3, snaps onto 60mm busbar. Sourced to order.","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":"0.25 hp","at 400 V rated value":"1 100 W","at 480 V rated value":"2.8 A","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"1 500 W","at 60 Hz rated value":"192 ... 264 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":"3RT2023-1AP60","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=184084&mlfb=3RA2125-1DD23-0AP6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1DD23-0AP6/alternatives.json"},"ai":{"faq":[{"question":"Can the 3RA2125-1DD23-0AP6 be mounted on a 60mm busbar system?","answer":"Yes, the fastening method is specifically for snapping onto 60 mm busbar systems, so it clips directly onto standard 60 mm busbars without adapters."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1DD23-0AP6","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/3RA2125-1DD23-0AP6 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}}