{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1220-1CD24-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1220-1CD24-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA1220-1CD24-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1220-1CD24-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS non-fused reversing starter, size S0, 0.75 kW at 400 V, 24 VDC coil, snaps onto 60 mm busbar systems.","salesMarkdown":"The Siemens 3RA1220-1CD24-0BB4 is a SIRIUS non-fused reversing starter, size S0, designed to control the direction of a three-phase motor by switching two contactors in an interlocked arrangement. The unit ships as a pre-assembled kit that includes the contactor (3RT10 24-1BB40), the circuit breaker (3RV10 21-1CA10), the link module (3RA19 21-1BA00), and the RS assembly kit (3RA19 23-1D), so the integrator gets a coordinated set rather than piecing together components. This reversing starter snaps directly onto 60 mm busbar systems (center-to-center spacing 60 mm), eliminating the need for separate DIN-rail mounting and reducing panel wiring time. The mounting position is horizontal, and the unit requires 30 mm clearance upward, 10 mm forward, 9 mm backward, and 30 mm at the side for airflow and cable routing — no clearance needed downward. Wire capacity on the main contacts accepts solid or stranded conductors from 1 to 6 mm², with dual-wire capability for 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²), covering typical motor feed cables in this power class. ## Environmental and operational limits The unit operates reliably from -20 to +70 °C and can be stored or transported from -55 to +80 °C, which suits unheated warehouses or shipping in cold climates. Shock resistance is rated at 12.5g, and the pollution degree is 3, meaning it tolerates conductive pollution typical of industrial control panels without conformal coating. No official successor has been issued for this order code, which is consistent with an active product that has not been superseded.","metaTitle":"Siemens 3RA1220-1CD24-0BB4 SIRIUS Reversing Starter, 0.75 kW","metaDescription":"Siemens 3RA1220-1CD24-0BB4 SIRIUS non-fused reversing starter, size S0, 0.75 kW at 400 V, 24 VDC coil. Snaps onto 60 mm busbar. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"154 mm","Solid":"1 ... 6 mm², 2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Width":"100 mm","Height":"208 mm","Upwards":"30 mm","Forwards":"10 mm","Stranded":"1 ... 6 mm²","Backwards":"9 mm","Downwards":"0 mm","At The Side":"30 mm","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-20 ... +70 °C","Fastening Method":"for snapping onto 60 mm busbar systems","Shock Resistance":"12.5g","Mounting Position":"horizontal","PROFINET protocol":"No","Solid Or Stranded":"1 ... 6 mm²","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused load feeder","Size Of Load Feeder":"S0","PROFIBUS DP protocol":"No","at 400 V rated value":"0.75 kW","Design Of The Product":"reversing starter","Number Of Digital Inputs":"0","Of The Supplied Contactor":"3RT10 24-1BB40","NO-Load Switching Frequency":"15 1/s","Of The Supplied Link Module":"3RA19 21-1BA00","Type Of The Motor Protection":"bimetal","Substance Prohibitance (Date)":"05/01/2012","Insulation Voltage Rated Value":"690 V","Busbar Center-To-Center Spacing":"60 mm","Design Of The Switching Contact":"electromechanical","at AWG cables for main contacts":"2x (14 ... 10)","of the supplied RS assembly kit":"3RA19 23-1D","Of The Supplied Circuit-Breakers":"3RV10 21-1CA10","protection class IP on the front":"IP20","Design Of Short-Circuit Protection":"circuit-breakers","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"No","Surge Voltage Resistance Rated Value":"6 kV","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"1 ... 6 mm²","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","protocol is supported AS-Interface protocol":"No","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","Type Of Voltage Of The Control Supply Voltage":"DC","operating voltage at AC-3 rated value maximum":"690 V","operational current at AC-3 at 400 V rated value":"1.9 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","AWG number as coded connectable conductor cross section for main contacts":"14 ... 10","breaking capacity maximum short-circuit current (Icu) at 400 V rated value":"50 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"1.8 ... 2.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=26517&mlfb=3RA1220-1CD24-0BB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA1220-1CD24-0BB4/alternatives.json"},"ai":{"faq":[{"question":"Does 3RA1220-1CD24-0BB4 work on a 60 mm busbar system?","answer":"Yes, this reversing starter is designed to snap directly onto 60 mm busbar systems with a center-to-center spacing of 60 mm, per the manufacturer's specification."},{"question":"What is the price of Siemens 3RA1220-1CD24-0BB4?","answer":"Pricing is confirmed at quote time against an RFQ. Submit a request for current pricing and availability; the figure depends on quantity and market conditions at the time of order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1220-1CD24-0BB4","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/3RA1220-1CD24-0BB4 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}}