{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4DH27-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4DH27-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4DH27-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DH27-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing starter, 3RA2220-4DH27-0BB4, S0 size, 25 A at 400 V AC-3, Class 10 trip, spring-loaded terminals, 60 mm busbar snap-on mount.","salesMarkdown":"## S0 reversing starter, 25 A AC-3, busbar snap-on The 3RA2220-4DH27-0BB4: The Class 10 trip characteristic means it clears overloads fast enough to protect standard squirrel-cage motors on start-up without nuisance tripping on a normal acceleration curve. ## Mounting and wiring — 60 mm busbar, spring terminals This unit snaps directly onto 60 mm busbar systems — no DIN rail adapter needed, no extra bracketry. The vertical mounting position is mandatory per the spec; horizontal mounting would compromise the thermal calibration of the overload relay. Main circuit connections are spring-loaded terminals — push the stripped wire in, no screwdriver torque to check. The S0 frame keeps the width at 90 mm and depth at 165 mm, which fits a standard 260 mm tall enclosure section without crowding the gland plate. ## What's in the box — contactor and link module included The reversing starter ships as a pre-assembled unit containing a 3RT2027-2BB40 contactor and a 3RA2921-2AA00 link module. The contactor is the switching element; the link module provides the mechanical and electrical interlock between the forward and reverse contactors, preventing both from closing simultaneously. ## Clearance and ambient limits Minimum clearances: 50 mm upward, 32 mm forward, 10 mm to the side and downward — zero clearance needed behind the unit. Ambient operating range is -20 to +60 °C with the same range for temperature compensation; storage and transport tolerance extends from -50 to +80 °C.","metaTitle":"Siemens 3RA2220-4DH27-0BB4 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA2220-4DH27-0BB4 SIRIUS reversing starter, 25 A at 400 V AC-3, Class 10, S0 size, 60 mm busbar mount. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Width":"90 mm","Height":"260 mm","Upwards":"50 mm","Forwards":"32 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"10 mm","Rated Value":"24 ... 24 V","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"for snapping onto 60 mm busbar systems","Mounting Position":"vertical","PROFIsafe protocol":"No","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Product Designation":"Reversing starter","Size Of Load Feeder":"S0","PROFINET IO protocol":"No","at 230 V rated value":"3 hp","at 400 V rated value":"11 000 kW","at 480 V rated value":"25 A","at 600 V rated value":"25 A","Design Of The Product":"for 60 mm busbars","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-20 ... +60 °C","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"7.5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"20 hp","Of The Supplied Contactor":"3RT2027-2BB40","Of The Supplied Link Module":"3RA2921-2AA00","Size Of The Circuit-Breaker":"S0","at AC-3 rated value maximum":"690 V","at AC-3 at 400 V rated value":"25 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"25 A","Design Of The Overload Release":"thermal (bimetallic)","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","of the supplied RS assembly kit":"3RA2923-1DB2","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4DA20","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Without Load Current Share Typical":"5.9 W","holding power of magnet coil at DC":"5.9 W","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"5.8 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","reference code according to IEC 81346-2:2019":"Q","shock resistance according to IEC 60068-2-27":"6g / 11 ms","Type Of Voltage Of The Control Supply Voltage":"DC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","Mechanical Service Life (Operating Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"325 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":"18 ... 25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/96fcd7ea280d3ed8a8e826a5d0c4ce12.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=394662&mlfb=3RA2220-4DH27-0BB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DH27-0BB4/alternatives.json"},"ai":{"faq":[{"question":"Will 3RA2220-4DH27-0BB4 drop into a panel specified around a 6ES7517-3FP00-0AB0?","answer":"No — those are entirely different product categories. The 6ES7517 is a Siemens S7-1500 CPU module; the 3RA2220 is a motor starter. They serve different functions and have different mounting, wiring, and communication requirements."},{"question":"How do I get current pricing and availability for this reversing starter?","answer":"Submit an RFQ through the storefront."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4DH27-0BB4","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/3RA2220-4DH27-0BB4 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}}