{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4EH27-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4EH27-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4EH27-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4EH27-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2220-4EH27-0AP0 reversing starter, S0 size, 29 A AC-3 at 400 V, Class 10, spring-loaded terminals, for 60 mm busbar systems.","salesMarkdown":"## Reversing starter for 60 mm busbar panels The 3RA2220-4EH27-0AP0 is a SIRIUS reversing starter — a pre-assembled combination of two contactors mechanically and electrically interlocked with an overload relay, all in a single S0-sized housing that snaps onto 60 mm busbar systems. ## Clearance and mounting for enclosure fit The unit measures 90 mm wide by 260 mm tall by 165 mm deep — the width is the critical number for spacing on a 60 mm busbar, since it determines how many starters fit per section. Siemens calls for 50 mm clearance above, 32 mm in front, 10 mm below, 10 mm to the side, and zero behind — those gaps are for airflow over the overload relay and to keep the spring terminals accessible for wiring. Mount it vertically only — the thermal bi-metal in the overload relay relies on convection to track motor current correctly; laying it on its side shifts the trip curve. ## Duty ratings and motor coordination At 400 V AC-3 the starter carries 29 A, which translates to roughly 15 kW — that's the motor full-load current it can switch forward and reverse under load without welding the contacts. The supplied contactor is a 3RT2027-2AP00 and the link module is 3RA2921-2AA00 — if you need spares for the contactor or the mechanical interlock, those are the order codes to pull.","metaTitle":"Siemens 3RA2220-4EH27-0AP0 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA2220-4EH27-0AP0 SIRIUS reversing starter, 29 A AC-3 at 400 V, Class 10 trip, S0 size, spring terminals. 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","title":"3RA2220-4EH27-0AP0","Height":"260 mm","Upwards":"50 mm","Forwards":"32 mm","at 50 Hz":"0.25","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"10 mm","Rated Value":"690 V","description":"Load feeder fuseless, Reversing duty 400 V AC, Size S0 27.0...32.0 A 230 V AC Spring-type terminal for 60 mm busbar systems (also fulfills type of coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor)","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":"5 hp","at 400 V rated value":"15 000 kW","at 480 V rated value":"27 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"27 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":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"20 hp","Of The Supplied Contactor":"3RT2027-2AP00","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":"29 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"29 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":"3RV2021-4EA20","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":"9.8 W","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"6.7 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"9.8 VA","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":"AC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","Inductive Power Factor With The Holding Power Of The Coil":"0.25","Mechanical Service Life (Operating Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"400 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":"27 ... 32 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3284020be1e03df5b56d8cd8482ed0d5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=267495&mlfb=3RA2220-4EH27-0AP0"},"ai":{"faq":[{"question":"What is the AC-3 current rating of 3RA2220-4EH27-0AP0 at 400 V?","answer":"At 480 V and 600 V it's rated 27 A."},{"question":"What clearance is needed around this reversing starter in a panel?","answer":"Siemens specifies 50 mm above, 32 mm in front, 10 mm below, 10 mm to the side, and zero behind. Mount vertical only."},{"question":"What contactor and link module are supplied with 3RA2220-4EH27-0AP0?","answer":"The supplied contactor is 3RT2027-2AP00 and the link module is 3RA2921-2AA00."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4EH27-0AP0","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/3RA2220-4EH27-0AP0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}