{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4DF27-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4DF27-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4DF27-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4DF27-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing starter, S0 frame size, 25 A at 400 V AC-3, 24 VDC coil, Class 10 trip, spring-loaded terminals, supplied with 3RT2027-2BB40 contactor and 3RA2921-2AA00 link module.","salesMarkdown":"## Reversing starter, S0 frame, 25 A AC-3 — what the ratings mean The 3RA2220-4DF27-0BB4: That 25 A figure at 400 V is the motor current it handles during start and run, not the thermal overload setting; the Class 10 trip characteristic means it opens within 10 seconds at 600% of set current, matching typical compressor and conveyor starts. The control coil pulls 24 VDC nominal, so it drops straight into a 24 V industrial control bus without an interposing relay. The supplied contactor is 3RT2027-2BB40, and the link module is 3RA2921-2AA00 — the reversing interlock is built into that module, not the contactor itself. ## DIN rail mounting and panel space — the S0 footprint Mounts on a 35 mm DIN rail via an adapter for screw or snap-on fastening, mounting position vertical. The S0 frame dimensions are 130 mm deep, 90 mm wide, 269 mm tall. Clearance requirements: 50 mm upward, 32 mm forward, 0 mm backward, 10 mm downward, 10 mm at the side. The zero backward clearance means it can sit flush against a back panel — useful when the gland plate is tight. Spring-loaded terminals on the main current circuit — no screwdriver needed for the power wiring, which speeds panel build and reduces torque inspection. The terminals accept the wire gauge typical for 25 A motor circuits. ## Sourcing and lifecycle — current production, quoted to order This is not a legacy or sunset line; the SIRIUS S0 platform is the standard reversing starter for Siemens and is widely specified across European and North American panel builds. Sourced through independent distribution against an RFQ.","metaTitle":"Siemens 3RA2220-4DF27-0BB4 Reversing Starter, 25 A AC-3, S0","metaDescription":"Siemens SIRIUS reversing starter, S0 frame, 25 A at 400 V AC-3, 24 VDC coil, Class 10. Spring-loaded terminals. Active production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"130 mm","Width":"90 mm","title":"3RA2220-4DF27-0BB4","Height":"269 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 Spring-type 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":"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":"7.5 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":"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":"3RA2923-1BB2","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4DA20","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":"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/fdf3a23e8e13b28a99851ab4dc7dd436.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=376858&mlfb=3RA2220-4DF27-0BB4"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RA2220-4DF27-0BB4?","answer":"The 6ES7517-3FP00-0AB0 and 6ES7214-1BG40-0XB0 are Siemens PLC CPUs — different product class entirely, not a starter replacement. The reversing starter function is specific to the SIRIUS contactor-and-link-module assembly; a cross-brand substitution would require rewiring and re-certification of the motor branch circuit."},{"question":"What compliance documentation does Siemens provide for 3RA2220-4DF27-0BB4?","answer":"The part carries a CE mark per the low-voltage directive; UL and CSA listings are standard for the S0 frame family but are not individually confirmed in this entry. REACH compliance documentation is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4DF27-0BB4","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/3RA2220-4DF27-0BB4 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}}