{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-0GA23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-0GA23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-0GA23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-0GA23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-0GA23-0AK6 non-fused motor starter, Size S0, direct starter, CLASS 10, 690 V AC-3, 180 W at 400 V, 250 W at 690 V, snap-on DIN rail or screw-mount.","salesMarkdown":"## SIRIUS 3RA2 non-fused motor starter, Size S0 The Siemens 3RA2125-0GA23-0AK6 is a SIRIUS non-fused motor starter, Size S0, configured as a direct starter — meaning it combines a contactor and overload relay in one unit for simple on/off motor control with thermal and magnetic protection. The magnetic short-circuit trip handles fault clearing. It ships with a 3RT2023-1AK60 contactor, a 3RV2011-0GA15 circuit-breaker (Size S00), and a 3RA2921-1AA00 link module — all pre-assembled and wired internally. The auxiliary switch option is built in, so adding feedback to a PLC or safety relay is straightforward. ## Motor ratings and duty — CLASS 10, 690 V AC-3 The AC-3 rated maximum is 690 V — this is the voltage ceiling for switching squirrel-cage motors under full load. At 400 V the unit handles 180 W; at 690 V it handles 250 W. The operating frequency is 50 to 60 Hz, with the coil rated 88–121 V at 50 Hz and 96–132 V at 60 Hz. The 6 kV rated surge voltage resistance (impulse withstand) means the starter can handle transient spikes on the line without flashover — important for industrial environments with switching surges from nearby drives. Pollution degree 3 rating means it's suitable for environments with conductive or dry non-conductive pollution — typical for control panels near production floors, not clean rooms. ## Mounting and clearances — DIN rail or screw-mount Snap-mounts onto 35 mm DIN rail (EN 60715) or screw-mounts with an additional push-in lug. The vertical mounting position is specified — horizontal mounting would affect the bimetallic trip curve and is not recommended. Dimensions: 45 mm wide, 97.1 mm deep, 193.1 mm high. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, 0 mm backward (flush to the panel backplane). These matter for heat dissipation and for accessing the auxiliary switch wiring. Operating temperature range is -20 to +60 °C — standard for indoor panel installation. Storage range is -50 to +80 °C; transport range is -55 to +80 °C.","metaTitle":"Siemens 3RA2125-0GA23-0AK6 SIRIUS Motor Starter, CLASS 10","metaDescription":"Siemens 3RA2125-0GA23-0AK6 SIRIUS non-fused motor starter, Size S0, CLASS 10, 690 V AC-3. Direct starter with supplied contactor and circuit-breaker.","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":"3RA2125-0GA23-0AK6","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 0.45-0.63A 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":"180 W","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"180 W","at 60 Hz rated value":"96 ... 132 V","at 690 V rated value":"250 W","Design Of The Product":"direct starter","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":"3RV2011-0GA15","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":"0.6 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":"8.19 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":"0.45 ... 0.63 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/b9c3df26ed99978ed2b9f15b2df38960.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=381576&mlfb=3RA2125-0GA23-0AK6"},"ai":{"faq":[{"question":"What are the key ratings of the 3RA2125-0GA23-0AK6?","answer":"CLASS 10 trip, AC-3 rated maximum 690 V, 180 W at 400 V, 250 W at 690 V, 3-pole main current circuit, thermal bimetallic overload release with magnetic short-circuit trip. Dimensions: 45 mm wide, 97.1 mm deep, 193.1 mm high."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-0GA23-0AK6","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/3RA2125-0GA23-0AK6 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}}