{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4DB27-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4DB27-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4DB27-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DB27-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing starter, 3RA2220-4DB27-0BB4, S0 size, 25 A at 400 V AC-3, Class 10, screw terminals, 90 mm x 130 mm x 265 mm.","salesMarkdown":"## What it is and how it wires up The Siemens 3RA2220-4DB27-0BB4 is a SIRIUS reversing starter — a pre-assembled combination of a reversing contactor pair and a motor-protective circuit-breaker in one S0-size package. It ships with the contactor 3RT2027-1BB40 and the link module 3RA2921-1BA00 already integrated, so you get the reversing interlock and overload protection without piecing together separate units on the rail. ## Mounting and panel fit Fastens via an adapter for screw mounting or snaps onto 35 mm DIN rail. Mounting position is vertical, and the envelope is 90 mm wide by 130 mm deep by 265 mm tall — that width is the critical number on a crowded DIN rail; at 90 mm it takes up two standard 45 mm-wide module slots. Clearance around the block: 50 mm upwards, 32 mm forwards, 10 mm downwards, and 10 mm at the side — no space needed behind. Main circuit terminals are screw-type, so you torque the lugs with a standard screwdriver — no special tooling. The size S0 load feeder matches the common S0 circuit-breaker footprint, keeping the wiring channel clean.","metaTitle":"Siemens 3RA2220-4DB27-0BB4 Reversing Starter, SIRIUS","metaDescription":"Siemens 3RA2220-4DB27-0BB4 SIRIUS reversing starter, 25 A at 400 V AC-3, Class 10 trip, S0 size. Active production, quoted to order. DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"130 mm","Width":"90 mm","title":"3RA2220-4DB27-0BB4","Height":"265 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 installation on standard mounting rail with standard mounting rail adapter (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":"On adapter for screw and snap-on mounting on 35 mm DIN rail","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 standard rail or screw mounting","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 RH assembly kit":"3RA2923-1BB1","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","Of The Supplied Standard Mounting Rail Adapter":"3RA2922-1AA00","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/9f41459dfcc1845ac5dab2c6f881231c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=457021&mlfb=3RA2220-4DB27-0BB4"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4DB27-0BB4","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/3RA2220-4DB27-0BB4 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}}