{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1HA24-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1HA24-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1HA24-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1HA24-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-1HA24-0AP6 non-fused motor starter, S0 size, direct starter design, 3 kW at 400 V AC-3, Class 10 thermal bimetallic overload relay, 45 x 97.1 x 193.1 mm.","salesMarkdown":"## SIRIUS 3RA2 non-fused motor starter — direct starter, S0 frame The Siemens 3RA2125-1HA24-0AP6 is a SIRIUS non-fused motor starter in the 3RA2 family, configured as a direct starter (across-the-line) in the S0 size. It integrates a 3RT2024-1AP60 contactor and a thermal bimetallic overload relay into a single unit, saving panel space and wiring compared to a contactor-plus-relay build. ## Overload protection and contactor pairing — Class 10, bimetallic This is the correct class for most general-purpose motor starting; a Class 20 would allow longer locked-rotor time but risks winding damage on frequent starts. The supplied contactor (3RT2024-1AP60) is already wired to the overload block via the link module 3RA2921-1AA00, so the starter arrives as a single assembly. Main contact wiring accepts 1–10 mm² stranded, or 2×(2.5–6 mm²) for paralleled feeds. ## Panel integration — DIN rail snap-on, S0/S00 footprint Mounts vertically on a DIN rail via snap-on fastening, or can be screw-mounted with an additional push-in lug. The S0 size (45 mm wide, 97.1 mm deep, 193.1 mm high) fits standard 45 mm slot spacing; the circuit-breaker portion is S00 size, so the overall depth is driven by the contactor and overload block. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, and 0 mm backward — the back is flush to the mounting surface. These are the minimum air gaps for heat dissipation and arc flash clearance; a panel builder should maintain them, especially when grouping multiple starters side-by-side.","metaTitle":"Siemens 3RA2125-1HA24-0AP6 SIRIUS Motor Starter","metaDescription":"Siemens 3RA2125-1HA24-0AP6 SIRIUS non-fused motor starter, 3 kW at 400 V AC-3, Class 10 thermal overload, S0 size. 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":"3RA2125-1HA24-0AP6","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 5.5-8Amp 220/240VAC 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":"1 hp","at 400 V rated value":"3 000 W","at 480 V rated value":"7.92 A","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"4 000 W","at 60 Hz rated value":"192 ... 264 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":"3RT2024-1AP60","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)","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fc092598de72811991842c0bb754441c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=332635&mlfb=3RA2125-1HA24-0AP6"},"ai":{"faq":[{"question":"What motor power does 3RA2125-1HA24-0AP6 handle at 400 V?","answer":"At 400 V AC-3, it is rated for 3 kW (approximately 4 hp). At 460/480 V it handles 5 hp, and at 575/600 V also 5 hp. The maximum switching voltage is 690 V AC-3."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1HA24-0AP6","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/3RA2125-1HA24-0AP6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}