{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-1KB24-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-1KB24-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-1KB24-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-1KB24-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing starter, 3RA2220-1KB24-0BB4, S0 size, 12 A AC-3 at 400 V, 24 V DC coil, Class 10 trip, screw terminals, DIN rail.","salesMarkdown":"## Reversing starter for motor-direction control The 3RA2220-1KB24-0BB4 is a SIRIUS reversing starter — a pre-assembled unit that combines two contactors and an overload relay in one S0-size package, so a single DIN-rail mount handles forward/reverse motor control without wiring up separate contactors. The 24 V DC coil matches standard PLC-level control voltages, and the screw-type terminals accept field wiring without crimp tooling. ## DIN-rail footprint and panel fit Mounts vertically on a 35 mm DIN rail via the included adapter — screw or snap-on — with a 130 mm depth, 90 mm width, and 265 mm height envelope that fits standard 600 mm deep enclosures with room for gland plates. Clearance requirements are 50 mm above, 32 mm in front, 10 mm at the sides, and 10 mm below — no space needed behind the rail, so back-to-back mounting on adjacent rails is possible. Operating ambient range -20 to +60 °C covers most plant-floor environments without derating for standard motor loads.","metaTitle":"Siemens 3RA2220-1KB24-0BB4 SIRIUS Reversing Starter","metaDescription":"Siemens 3RA2220-1KB24-0BB4 SIRIUS reversing starter, S0 size, 12 A at 400 V AC-3, 24 V DC coil, Class 10, DIN rail. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"130 mm","Width":"90 mm","title":"3RA2220-1KB24-0BB4","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 9.00...12.5 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":"2 hp","at 400 V rated value":"5 500 kW","at 480 V rated value":"11 A","at 600 V rated value":"10 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":"0.75 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 hp","Of The Supplied Contactor":"3RT2024-1BB40","Of The Supplied Link Module":"3RA2921-1BA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","at AC-3 at 400 V rated value":"12 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"12 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":"3RV2011-1KA10","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":"3.4 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":"163 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":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cf66a78fbb0f4458b65bf14975ef8e69.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=402087&mlfb=3RA2220-1KB24-0BB4"},"ai":{"faq":[{"question":"What does the 12 A AC-3 rating mean for motor sizing?","answer":"At 400 V AC-3, the 12 A rating corresponds to a 5.5 kW motor — that is the full-load current the starter handles during starting and running. The Class 10 trip curve allows up to 10 seconds of overload before tripping, which covers normal motor start-up without nuisance trips."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-1KB24-0BB4","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/3RA2220-1KB24-0BB4 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}}