{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1BD23-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1BD23-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1BD23-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1BD23-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1BD23-0AP6 non-fused motor starter, direct starter, Size S0, 750 W at 400 V AC-3, Class 10 thermal overload, 45 mm width, 155 mm depth, 260 mm height.","salesMarkdown":"## SIRIUS 3RA2 direct starter — panel fit and motor protection The 3RA2120-1BD23-0AP6 is a non-fused direct starter from the Siemens SIRIUS 3RA2 family, combining a contactor and a thermal bimetallic overload relay in one S0-size package. The supplied contactor is the 3RT2023-1AP60, and the link module 3RA2921-1AA00 ties the contactor and overload together. The busbar adapter 8US1251-5NT10 is included for snapping onto 60 mm busbar systems. Rated operational voltage is 690 V maximum, with control supply accepted at 176...242 V at 50 Hz and 192...264 V at 60 Hz. The unit draws 1.63 A at 480 V and 1.72 A at 600 V. ## Mounting dimensions and clearance envelope The starter measures 45 mm wide, 155 mm deep, and 260 mm tall. It mounts vertically and requires 30 mm clearance upwards, 10 mm forwards, 10 mm downwards, and 9 mm at the side for airflow and wiring access. No backwards clearance is needed. The S0 load feeder size and S00 circuit-breaker size define the panel cutout and busbar interface. Stranded main contacts accept 1...10 mm² or 2x (2.5...6 mm²) wire. ## Operating environment and approvals The starter operates in ambient temperatures from -20 to +60 °C, stores at -50 to +80 °C, and transports at -55 to +80 °C. Pollution degree 3 means it tolerates conductive dust and condensation typical in industrial panels. Assignment type 2 coordination means the starter coordinates with a backup short-circuit protective device (typically a circuit-breaker or fuse) to ensure no damage to the starter under short-circuit conditions up to the rated breaking capacity.","metaTitle":"Siemens 3RA2120-1BD23-0AP6 SIRIUS Motor Starter","metaDescription":"Siemens SIRIUS 3RA2120-1BD23-0AP6 non-fused motor starter, 750 W at 400 V AC-3, Class 10 thermal overload, S0 size, 45 mm wide. Current production.","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":"0.13 hp","at 400 V rated value":"750 W","at 480 V rated value":"1.63 A","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"750 W","at 60 Hz rated value":"192 ... 264 V","at 600 V rated value":"1.72 A","at 690 V rated value":"1 100 W","Design Of The Product":"direct starter","at 460/480 V rated value":"0.75 hp","at 575/600 V rated value":"1 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":"3RV2011-1BA10","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":"1","number of NO contacts for auxiliary contacts":"1","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 (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"26 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":"1.4 ... 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":"https://cdn.aoctrl.com/e964ea0b88afd3c1a43575b9248b211b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298077&mlfb=3RA2120-1BD23-0AP6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1BD23-0AP6/alternatives.json"},"ai":{"faq":[{"question":"What motor power does 3RA2120-1BD23-0AP6 handle at 400 V?","answer":"It is rated for 750 W at 400 V AC-3, and also 750 W at 500 V and 1 100 W at 690 V."},{"question":"What clearance is needed around this starter in a panel?","answer":"Allow 30 mm above, 10 mm in front, 10 mm below, and 9 mm to the side. No rear clearance is required. The unit mounts vertically."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1BD23-0AP6","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/3RA2120-1BD23-0AP6 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}}