{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1220-1DB24-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1220-1DB24-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA1220-1DB24-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1220-1DB24-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA1220-1DB24-0AP0, non-fused reversing load feeder, size S0, 1.1 kW at 400 V, bimetal motor protection, snap-on 35 mm DIN rail.","salesMarkdown":"## What this SIRIUS reversing load feeder packs The Siemens 3RA1220-1DB24-0AP0 is a non-fused reversing load feeder from the SIRIUS family, size S0. It's a reversing starter assembly — meaning it combines a contactor pair, a bimetal overload relay, and a circuit-breaker in one DIN-rail-mounted block. Rated 1.1 kW at 400 V, it handles reversing motor loads like conveyors, hoists, and gate drives where direction change is part of the cycle. The supplied circuit-breaker is a 3RV10 21-1DA10, and the supplied contactor is a 3RT10 24-1AP00 — both matched to the S0 frame. That means the short-circuit protection and switching duty are coordinated out of the box, no separate sizing exercise. ## Mounting and wiring — what fits where Snaps onto 35 mm standard rail (EN 60715). Horizontal mounting position only. Dimensions: 100 mm wide, 220 mm tall, 119 mm deep. Clearance requirements: 30 mm upward, 10 mm forward, 9 mm backward, 0 mm downward, 30 mm at the side. That forward clearance is tight — plan for gland plates or busbar covers that might eat into it. Wire range: solid or stranded 1 to 6 mm² on the main contacts, with dual-wire capability: 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²). AWG equivalent for main contacts is 2x (14 to 10). That covers most motor branch circuits up to the 1.1 kW rating. Shock resistance 12.5g. No PROFINET or PROFIBUS DP onboard — this is a pure power device, no fieldbus.","metaTitle":"Siemens 3RA1220-1DB24-0AP0 SIRIUS reversing load feeder","metaDescription":"Siemens 3RA1220-1DB24-0AP0 SIRIUS non-fused reversing load feeder, size S0, 1.1 kW at 400 V, bimetal motor protection, snap-on DIN rail. Current lifecycle","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"119 mm","Solid":"1 ... 6 mm², 2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","Width":"100 mm","Height":"220 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":"snap-on fastening on 35 mm standard rail","Shock Resistance":"12.5g","Mounting Position":"horizontal","PROFINET protocol":"No","Solid Or Stranded":"1 ... 6 mm²","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":"1.1 kW","at 50 Hz rated value":"230 V","Design Of The Product":"reversing starter","Number Of Digital Inputs":"0","Of The Supplied Contactor":"3RT10 24-1AP00","NO-Load Switching Frequency":"15 1/s","Of The Supplied Link Module":"3RA19 21-1AA00","Type Of The Motor Protection":"bimetal","Substance Prohibitance (Date)":"05/01/2012","Insulation Voltage Rated Value":"690 V","Design Of The Switching Contact":"electromechanical","at AWG cables for main contacts":"2x (14 ... 10)","of the supplied RH assembly kit":"3RA19 23-1B","Of The Supplied Circuit-Breakers":"3RV10 21-1DA10","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":"AC","operating voltage at AC-3 rated value maximum":"690 V","Control Supply Voltage Frequency 1 Rated Value":"50 Hz","operational current at AC-3 at 400 V rated value":"2.7 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":"2.2 ... 3.2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$190.50","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=13959&mlfb=3RA1220-1DB24-0AP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA1220-1DB24-0AP0/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 3RA1220-1DB24-0AP0 and 3RA2210-1DA15-2AP0?","answer":"The 3RA2210-1DA15-2AP0 is a different SIRIUS variant; the 3RA1220-1DB24-0AP0 is a size S0 reversing feeder with a bimetal overload, while the 3RA2210 is a different frame and function. They are not direct drop-in replacements without verifying the application specs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1220-1DB24-0AP0","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/3RA1220-1DB24-0AP0 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}}