{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2220-4BB26-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2220-4BB26-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2220-4BB26-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4BB26-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2220-4BB26-0BB4 reversing starter, Size S0, 20 A at 400 V AC-3, 690 V max, Class 10, 24 V DC coil, screw terminals, DIN rail.","salesMarkdown":"## What this reversing starter carries The Siemens 3RA2220-4BB26-0BB4 is a SIRIUS reversing starter in Size S0 — a pre-assembled combination of a contactor pair and a link module that handles forward/reverse motor control in one DIN-rail footprint. It ships with a 3RT2026-1BB40 contactor and a 3RA2921-1BA00 link module, so you are not piecing together the reversing interlock yourself. The coil is 24 V DC — that 24... 24 V entry in the spec is not a range, it is a confirmation of a fixed 24 V DC control voltage. The starter measures 130 mm deep, 90 mm wide, and 265 mm tall. Mounting is vertical on a 35 mm DIN rail via the supplied adapter, or direct screw-mount to a backplate. Clearance requirements: 50 mm upwards, 32 mm forwards, 10 mm downwards, and 10 mm at the side — zero backwards clearance needed, so it can sit tight against a panel wall or busbar. Size S0 load feeder format means it shares the same busbar system and mounting hole pattern as other S0 components in the SIRIUS family. If you are swapping an older reversing starter out of a S0 panel, this drops in without redrilling the backplate. ## Lifecycle and sourcing posture Standard Siemens declarations (CE, UKCA, UL, IEC) apply to the SIRIUS series — request the specific declaration of conformity with your RFQ if your quality system requires it on file.","metaTitle":"Siemens 3RA2220-4BB26-0BB4 Reversing Starter, S0, 20 A AC-3","metaDescription":"Siemens SIRIUS 3RA2220-4BB26-0BB4 reversing starter, Size S0, 20 A at 400 V AC-3, Class 10, 24 V coil. 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","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","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":"1","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 600 V rated value":"20 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":"1.5 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","Of The Supplied Contactor":"3RT2026-1BB40","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":"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 RH assembly kit":"3RA2923-1BB1","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4BA10","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":"5.4 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":"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/65a735d8b165f714f19a33d2f9ed5e0d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=99371&mlfb=3RA2220-4BB26-0BB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2220-4BB26-0BB4/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RA2220-4BB26-0BB4 rated for in AC-3 duty?","answer":"The Class 10 trip class protects standard motors during start-up. Horsepower ratings span 1.5 hp at 110/120 V up to 15 hp at 460/480 V."},{"question":"How is the 3RA2220-4BB26-0BB4 quoted for volume purchases?","answer":"Submit an RFQ for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2220-4BB26-0BB4","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/3RA2220-4BB26-0BB4 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}}