{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4DD27-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4DD27-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4DD27-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DD27-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2220-4DD27-0BB4 reversing starter, S0 size, 25 A AC-3 at 400 V, Class 10 trip, for 60 mm busbar systems, screw-type terminals.","salesMarkdown":"## What the 25 A AC-3 rating means for motor control The 3RA2220-4DD27-0BB4: The supplied contactor is a 3RT2027-1BB40, and the link module is 3RA2921-1BA00 — these are the matched components that make the reversing pair and interlock. The S0 feeder size tells you the physical frame and the short-circuit breaking capacity range; it shares the same mounting footprint as other S0 devices in the SIRIUS family. ## Mounting on 60 mm busbar systems — panel integration constraints This reversing starter is designed for snapping onto 60 mm busbar systems, not for standard DIN rail. The mounting position is vertical only. Dimensions are 260 mm height, 90 mm width, and 165 mm depth — the depth is the critical dimension for enclosure depth selection, especially when the busbar system is mounted on a backplate. Clearance requirements: 50 mm upwards, 32 mm forwards, 10 mm downwards, and 10 mm at the side. Backwards clearance is 0 mm — the unit sits flush against the mounting surface. These are the minimum free air spaces for heat dissipation and arc containment; crowding them derates the thermal performance. ## Active production — sourcing posture for this BOM line No separate UL or CSA listing is stated in the spec record; confirm the specific approval mark required for your jurisdiction at RFQ.","metaTitle":"Siemens 3RA2220-4DD27-0BB4 Reversing Starter, 25 A AC-3, S0","metaDescription":"Siemens SIRIUS 3RA2220-4DD27-0BB4 reversing starter, 25 A AC-3 at 400 V, Class 10, S0 size. Active production, sourced to order. RFQ for pricing and lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Width":"90 mm","title":"3RA2220-4DD27-0BB4","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","description":"Load feeder fuseless, Reversing duty 400 V AC, Size S0 18...25 A 24 V DC 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 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":"3RT2027-1BB40","Of The Supplied Link Module":"3RA2921-1BA00","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":"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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e9d4a4a8b4d5010501f8730c5d6f7888.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=106960&mlfb=3RA2220-4DD27-0BB4"},"ai":{"faq":[{"question":"What is the AC-3 current rating at 400 V for this reversing starter?","answer":"This is the switching current for motor starting and stopping under full load, not the thermal continuous current."},{"question":"What components are supplied with the 3RA2220-4DD27-0BB4?","answer":"The reversing starter ships with a 3RT2027-1BB40 contactor and a 3RA2921-1BA00 link module. These are the matched reversing pair and mechanical interlock."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4DD27-0BB4","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/3RA2220-4DD27-0BB4 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}}