{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1CD23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1CD23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1CD23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1CD23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1CD23-0AK6 non-fused direct motor starter, size S0, 690 V AC-3 max, 750 W at 400 V, thermal overload, 45 mm width, for 60 mm busbar.","salesMarkdown":"## SIRIUS non-fused direct starter — S0 frame, busbar snap-on The Siemens 3RA2120-1CD23-0AK6 is a SIRIUS non-fused direct motor starter in size S0, designed to snap onto 60 mm busbar systems — no separate mounting plate needed. It ships as a pre-assembled unit: a 3RT2023-1AK60 contactor, a thermal bimetallic overload relay, a link module 3RA2921-1AA00, a circuit-breaker size S00, and a busbar adapter 8US1251-5NT10. That means the BOM line is one order code, not five separate picks. ## Ratings that define the load envelope Rated AC-3 switching up to 690 V, with a motor output of 750 W at 400 V — that covers a standard 1 hp (0.75 kW) three-phase motor at 400 V line. The coil accepts two voltage ranges selectable by assignment: 88–121 V at 50 Hz and 96–132 V at 60 Hz, so it works on both 100–120 V control transformers without a separate coil change. ## Mounting dimensions and clearances Dimensions are 260 mm height × 45 mm width × 155 mm depth. The 45 mm width matches the S0 busbar slot pitch — it occupies one 45 mm module on a 60 mm busbar system. Required free space around the unit: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the sides, and 0 mm backwards. That 0 mm backwards clearance means it can sit flush against a back panel or enclosure wall. Mounting position is vertical only — horizontal mounting would affect the thermal overload trip curve.","metaTitle":"Siemens 3RA2120-1CD23-0AK6 SIRIUS Motor Starter, 690 V AC-3","metaDescription":"Siemens 3RA2120-1CD23-0AK6 SIRIUS non-fused direct motor starter. Size S0, 690 V AC-3 max, 750 W at 400 V. Snaps onto 60 mm busbar.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"45 mm","title":"3RA2120-1CD23-0AK6","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","description":"Fuseless motor starter Direct start 600VAC Size S0 1.8-2.5A 110/120VAC 50/60HZ screw connection For snapping onto 60 mm busbar systems Type of coordination 2 IQ = 150 KA Also full fills type Of coordination 1 1NO+1NC (contactor)","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":"0.17 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","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":"3RV2011-1CA10","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":"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/a86d61b14cf69d8fda8c5710278dcc08.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=226759&mlfb=3RA2120-1CD23-0AK6"},"ai":{"faq":[{"question":"What is the lead time and how do I get a price for 3RA2120-1CD23-0AK6?","answer":"This is quoted to order through independent distribution. No stock-holding claim; we source per your BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1CD23-0AK6","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/3RA2120-1CD23-0AK6 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}}