{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1CA23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1CA23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1CA23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1CA23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-1CA23-0AK6 non-fused direct starter, Size S0, Class 10 thermal bimetallic overload, 750 W at 400 V, 50/60 Hz, snap-on DIN rail.","salesMarkdown":"## Direct starter with thermal overload — SIRIUS 3RA2 The Siemens 3RA2125-1CA23-0AK6 is a non-fused motor starter from the SIRIUS 3RA2 family, configured as a direct starter (Type of Assignment 2) for across-the-line starting of three-phase motors. It integrates a 3RT2023-1AK60 contactor and a 3RA2921-1AA00 link module, plus a thermal bimetallic overload relay with trip Class 10 — the standard protection for normal-starting squirrel-cage motors where the rotor accelerates within 10 seconds at locked-rotor current. ## Class 10 trip curve and thermal overload protection Pollution degree 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation) is the specified environmental class, typical for industrial control panels not in a climate-controlled clean room. ## Mounting and panel integration — DIN rail or screw The mounting position is vertical only — horizontal installation is not supported and would affect the thermal trip accuracy. Dimensions: 45 mm width, 97.1 mm depth, 193.1 mm height. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards — the back of the unit sits flush against the mounting surface. ## Active production — sourcing and documentation Supplied as a complete, factory-assembled unit with the contactor and link module pre-installed. The circuit-breaker size is S00; the load feeder size is S0.","metaTitle":"Siemens 3RA2125-1CA23-0AK6 SIRIUS Motor Starter","metaDescription":"Siemens 3RA2125-1CA23-0AK6 SIRIUS non-fused motor starter, 750 W at 400 V, Class 10 thermal overload. Active production. Quoted to order against RFQ.","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":"3RA2125-1CA23-0AK6","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 1.8-2.5A 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":"0.17 hp","at 400 V rated value":"750 W","at 480 V rated value":"2.15 A","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"1 100 W","at 60 Hz rated value":"96 ... 132 V","at 600 V rated value":"2.24 A","Design Of The Product":"direct starter","at 200/208 V rated value":"0.5 hp","at 220/230 V rated value":"0.5 hp","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"1.5 hp","Of The Supplied Contactor":"3RT2023-1AK60","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","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2011-1CA15","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":"1.9 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 (Operating Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"32.5 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Type Of Connectable Conductor Cross-Sections For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"1.8 ... 2.5 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/24471370ea7e0e989f531eea3cda93a9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=287961&mlfb=3RA2125-1CA23-0AK6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1CA23-0AK6","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/3RA2125-1CA23-0AK6 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}}