{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4BH27-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4BH27-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4BH27-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4BH27-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2220-4BH27-0AP0 reversing starter, size S0, 20 A AC-3 at 400 V, Class 10 trip, spring-loaded terminals, for 60 mm busbar systems.","salesMarkdown":"## Reversing starter that snaps onto 60 mm busbars The 3RA2220-4BH27-0AP0 is a SIRIUS reversing starter in size S0, designed to snap directly onto 60 mm busbar systems — no DIN-rail adapter needed for that mounting method. It ships with the contactor 3RT2027-2AP00 and the link module 3RA2921-2AA00 as a matched assembly, so you get the interlock and reversing logic built in, not wired up on site. At 480 V it's rated 20 A, at 600 V also 20 A, so the current limit holds across common North American voltages. ## Mounting dimensions and clearance needs The starter body measures 90 mm wide by 260 mm high by 165 mm deep. It mounts vertically only. Forwards clearance is 32 mm for wiring access; upwards you need 50 mm, downwards 10 mm, and 10 mm at the sides. Backwards clearance is zero when snapped onto the busbar — the back face sits flush against the busbar system. The main circuit uses spring-loaded terminals — no screw torque to check, but you'll want a ferrule on stranded wire to keep the strands from splaying. Operating temperature range is -20 to +60 °C, storage and transport -50 to +80 °C.","metaTitle":"Siemens 3RA2220-4BH27-0AP0 SIRIUS Reversing Starter, S0","metaDescription":"Siemens 3RA2220-4BH27-0AP0 SIRIUS reversing starter, size S0, 20 A AC-3 at 400 V, Class 10 trip, spring terminals, snaps on 60 mm busbars.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"165 mm","Width":"90 mm","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","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":"7 500 kW","at 480 V rated value":"20 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"20 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":"1.5 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":"15 hp","Of The Supplied Contactor":"3RT2027-2AP00","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":"20 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"20 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":"3RV2021-4BA20","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":"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":"260 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":"13 ... 20 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/33d5e6feb6f5ad8dab71fd59de4a8580.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=305399&mlfb=3RA2220-4BH27-0AP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4BH27-0AP0/alternatives.json"},"ai":{"faq":[{"question":"What is the AC-3 current rating at 400 V for 3RA2220-4BH27-0AP0?","answer":"At 480 V and 600 V it's also 20 A, so the current limit holds across 400 V, 480 V, and 600 V systems."},{"question":"What are the mounting clearances needed around this reversing starter?","answer":"Forwards 32 mm, upwards 50 mm, downwards 10 mm, sideways 10 mm. Backwards clearance is zero when snapped onto 60 mm busbars. Mount vertically only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4BH27-0AP0","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/3RA2220-4BH27-0AP0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}