{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4DD27-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4DD27-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4DD27-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DD27-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 reversing starter, 25 A AC-3 at 400 V, Class 10, screw terminals, snap-on 60 mm busbar mount, supplied with contactor 3RT2027-1AP00 and link module 3RA2921-1AA00.","salesMarkdown":"## Reversing starter for busbar-mount panels The 3RA2220-4DD27-0AP0 is a SIRIUS reversing starter in size S0 — a single assembly that swaps motor direction without external contactor interlocking. It ships with the 3RT2027-1AP00 contactor and 3RA2921-1AA00 link module already matched, so the reversing interlock is built in at the factory. The Class 10 trip characteristic means it handles motor starts that clear within 10 seconds at locked-rotor current — standard for most general-purpose induction motors driving pumps, fans, and conveyors. ## Snaps onto 60 mm busbars, vertical only Mounting is by snapping onto 60 mm busbar systems in a vertical position — no DIN rail, no adapter plate. The 90 mm width and 155 mm depth mean it sits fairly slim on the busbars, though at 260 mm tall it needs clearance above and below for cable entry and the reversing contactor arc chutes. Clearance requirements: 50 mm upwards, 32 mm forwards, 10 mm sideways, and 10 mm downwards. The backwards clearance is zero — it can sit flush against the back panel or enclosure wall.","metaTitle":"Siemens 3RA2220-4DD27-0AP0 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA2220-4DD27-0AP0 SIRIUS reversing starter, 25 A at 400 V AC-3, size S0, Class 10, snaps onto 60 mm busbars. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"90 mm","title":"3RA2220-4DD27-0AP0","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 18...25 A 230 V AC screw 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":"3 hp","at 400 V rated value":"11 000 kW","at 480 V rated value":"25 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"25 A","Design Of The Product":"for 60 mm busbars","For Main Current Circuit":"screw-type 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":"3RT2027-1AP00","Of The Supplied Link Module":"3RA2921-1AA00","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":"3RA2923-1DB1","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4DA10","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"screw-type 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":"5.8 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":"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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e05cecee79c95254e0d29a718ae68d98.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=404363&mlfb=3RA2220-4DD27-0AP0"},"ai":{"faq":[{"question":"What is 3RA2220-4DD27-0AP0's AC-3 rating and what does it mean for motor sizing?","answer":"In practice this means it can reverse a three-phase motor drawing up to 25 A under full-load running conditions — roughly an 11 kW motor at 400 V. The Class 10 trip characteristic handles the inrush during a reversing sequence without nuisance tripping."},{"question":"Will 3RA2220-4DD27-0AP0 drop into a panel designed for a different reversing starter?","answer":"It snaps onto 60 mm busbar systems, not DIN rail. If the panel was laid out for a DIN-rail-mounted reversing starter, this unit will not clip in without changing the mounting structure. The 90 mm width and 155 mm depth are specific to the SIRIUS S0 form factor — confirm the panel clearance against those dimensions before committing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4DD27-0AP0","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/3RA2220-4DD27-0AP0 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}}