{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2125-1CA23-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2125-1CA23-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2125-1CA23-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2125-1CA23-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2125-1CA23-0BB4 non-fused motor starter, direct starter design, size S0, CLASS 10 thermal bimetallic overload, 750 W at 400 V AC-3, 45 mm width, 24 V coil.","salesMarkdown":"## Motor starter identity and lifecycle status The Siemens 3RA2125-1CA23-0BB4 is a non-fused motor starter from the SIRIUS 3RA2 series, a direct starter design combining a contactor and thermal bimetallic overload relay in one compact assembly. ## Trip class and motor protection coordination The overload release is thermal bimetallic, providing inverse-time protection that tracks the motor heating curve without a separate electronic module. ## Panel integration and mounting constraints Width is 45 mm, depth 107 mm, height 193.1 mm — fits a standard S0 feeder footprint on DIN rail or screw-mounted with the included push-in lug. Mounting position is vertical only; clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, 0 mm backwards — plan the enclosure layout accordingly. ## Rated performance and voltage range Rated at 750 W at 400 V (AC-3), 2.15 A at 480 V, 2.24 A at 600 V — covers 0.5 hp at 200/208 V up to 1.5 hp at 575/600 V. Maximum AC-3 operating voltage is 690 V, with a rated frequency of 50...60 Hz — suitable for global 400 V and 480 V line supplies. ## Environmental and compliance envelope Operating temperature range is -20...+60 °C; transport -55...+80 °C; storage -50...+80 °C — the starter can be stored in unconditioned warehouses and installed in ventilated enclosures. Degree of pollution 3 means the device is rated for industrial environments with conductive dust or occasional condensation — no additional conformal coating needed in typical panel conditions.","metaTitle":"Siemens 3RA2125-1CA23-0BB4 SIRIUS Motor Starter, CLASS 10","metaDescription":"Siemens SIRIUS 3RA2125-1CA23-0BB4 non-fused motor starter, CLASS 10 thermal overload, 750 W at 400 V, 45 mm wide. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"107 mm","Width":"45 mm","title":"3RA2125-1CA23-0BB4","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":"24 V","description":"Fuseless motor starter Direct start 600VAC Size S0 1.8-2.5A 24V DC 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 500 V rated value":"1 100 W","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":"3RT2023-1BB40","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1BA00","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":"3RV2011-1CA15","Product Extension Auxiliary Switch":"Yes","holding power of magnet coil at DC":"5.9 W","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","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","Mechanical Service Life (Switching 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","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/623f71b58b5126e6f5ca1a626e5a1e78.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=61917&mlfb=3RA2125-1CA23-0BB4"},"ai":{"faq":[{"question":"What is the width of the 3RA2125-1CA23-0BB4?","answer":"Width is 45 mm, depth 107 mm, height 193.1 mm — fits the S0 feeder footprint on DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2125-1CA23-0BB4","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/3RA2125-1CA23-0BB4 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}}