{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4NH27-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4NH27-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4NH27-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4NH27-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2220-4NH27-0BB4 reversing starter, S0 size, 28 A AC-3 at 400 V, CLASS 10, spring-loaded terminals, for 60 mm busbar systems.","salesMarkdown":"## What this reversing starter handles The Siemens 3RA2220-4NH27-0BB4 is a SIRIUS reversing starter, size S0, designed to reverse a three-phase motor by swapping two phases. It ships with the contactor 3RT2027-2BB40 and the link module 3RA2921-2AA00 already integrated. Trip class is CLASS 10, meaning it disconnects within 10 seconds at locked-rotor current, protecting the motor winding during a stall. The main circuit uses spring-loaded terminals — no screw torque to check, just strip and push. That saves time on a panel build and eliminates a common loose-termination fault. ## Mounting on 60 mm busbars — panel fit check This starter snaps directly onto 60 mm busbar systems — no DIN rail adapter needed. Mounting position is vertical only. Dimensions: 260 mm high, 90 mm wide, 165 mm deep. Clearance requirements: 50 mm above, 32 mm in front, 10 mm below, 10 mm at the sides, zero behind. That 165 mm depth plus 32 mm forwards means the enclosure needs at least 197 mm internal depth from the busbar face to the door. ## Active production — sourcing posture Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. The temperature compensation is built into the thermal overload characteristic across the same -20 to +60 °C band.","metaTitle":"Siemens 3RA2220-4NH27-0BB4 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA2220-4NH27-0BB4 SIRIUS reversing starter, 28 A AC-3 at 400 V, CLASS 10 trip, S0 size. 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":"165 mm","Width":"90 mm","title":"3RA2220-4NH27-0BB4","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 23.0...28.0 A 24 V DC 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 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":"7.5 hp","at 220/230 V rated value":"10 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":"28 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"28 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":"3RV2021-4NA20","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":"6.7 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","protocol is supported AS-Interface protocol":"No","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":"364 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":"23 ... 28 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/74a152e36732592f6935dfdccf158713.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=344705&mlfb=3RA2220-4NH27-0BB4"},"ai":{"faq":[{"question":"What is the AC-3 current rating of 3RA2220-4NH27-0BB4?","answer":"That is the motor-switching current, not the resistive load rating."},{"question":"How do I mount 3RA2220-4NH27-0BB4 in a panel?","answer":"It snaps onto a 60 mm busbar system — no DIN rail. Mount vertically. Allow 50 mm above, 32 mm in front, 10 mm below, and 10 mm at the sides for clearance."},{"question":"What compliance documentation does Siemens provide for 3RA2220-4NH27-0BB4?","answer":"Standard Siemens documentation includes the CE declaration and the product manual covering the SIRIUS 3RA2 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4NH27-0BB4","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/3RA2220-4NH27-0BB4 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}}