{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2628-1AK65","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2628-1AK65","canonicalUrl":"https://aoctrl.com/siemens/3RT2628-1AK65","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2628-1AK65","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, capacitor contactor, Size S0, 45 mm width, 110-120 VAC 50/60 Hz coil, screw-type terminals, rated switching capacity 6 A at 230 V AC.","salesMarkdown":"## Capacitor switching — what the ratings mean The Siemens 3RT2628-1AK65 is a dedicated capacitor contactor from the SIRIUS family, Size S0. It's built for switching power-factor-correction capacitor banks, not general motor loads — the switching capacity figures reflect inrush-limited capacitor duty: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. That 6 A at 230 V is the headline number for a typical 230 V bank; at 400 V you're down to 3 A, so size up if the bank draws more. The coil is 110-120 VAC, 50/60 Hz, screw-type terminals. ## Switching frequency limits matter here Capacitor contactors see repeated switching — power factor correction cycles with load changes. The 3RT2628-1AK65 is rated for 100 switching operations per hour at 230-400 V, dropping to 70/h at 480 V, 45/h at 600 V, and 36/h at 690 V. If your application cycles faster than that, you need a larger contactor or a different switching topology. ## DIN rail fit and wiring Size S0 gives you a 45 mm wide, 150 mm tall, 155 mm deep footprint. That helps when the gland plate or busbars force an odd orientation.","metaTitle":"Siemens 3RT2628-1AK65 SIRIUS Capacitor Contactor, 110-120 VA","metaDescription":"Siemens 3RT2628-1AK65 SIRIUS capacitor contactor, Size S0, 45 mm wide. Screw terminals, 110-120 VAC coil. Rated switching capacity: 6 A at 230 V, 3 A at 400 V. Current lifecycle. S","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"155 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","at AC":"4 ... 16 ms","title":"3RT2628-1AK65","Height":"150 mm","at 24 V":"6 A","at 60 V":"2 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 400 V":"3 A","at 50 Hz":"0.8 ... 1.1","at 690 V":"1 A","at 40 °C":"1x 16 mm²","at 60 °C":"1x 25 mm²","Attachable":"0","Arcing Time":"10 ... 10 ms","description":"capacitor contactor, AC-6b 33 kVAr, / 400 V, 3-pole, 110 V AC, 50 Hz / 120 V, 60 Hz, auxiliary contacts: 1 NO + 2 NC, screw terminal, size: S0","1 Rated Value":"50 Hz","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","at 230 V maximum":"100 1/h","at 240 V maximum":"100 1/h","at 400 V maximum":"100 1/h","at 480 V maximum":"70 1/h","at 500 V maximum":"65 1/h","at 600 V maximum":"45 1/h","at 690 V maximum":"36 1/h","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"capacitor contactors","at 50 Hz rated value":"110 ... 110 V","at 60 Hz rated value":"120 ... 120 V","Instantaneous Contact":"1","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"05/01/2014","For Grounded Parts At The Side":"10 mm","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"No","At Contactor For Auxiliary Contacts":"Screw-type terminals","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","With Side-By-Side Mounting At The Side":"10 mm","Electrical Endurance (Operating Cycles)":"150 000","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"0.00000001","mirror contact according to IEC 60947-4-1":"No","apparent holding power of magnet coil at AC":"9.8 VA","apparent pick-up power of magnet coil at AC":"77 VA","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.82","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.25","Of The Contactor With Added Auxiliary Switch Block Typical":"3 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","AWG number as coded connectable conductor cross section for main contacts":"10 ... 4","For Short-Circuit Protection Of The Main Circuit With Type Of Coordination 1 Required":"gG: 100 A (690 V, 50 kA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/36dd2efac410d81a7399adb948b76e7c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646319&mlfb=3RT2628-1AK65"},"ai":{"faq":[{"question":"Where can I buy 3RT2628-1AK65 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What is 3RT2628-1AK65's switching capacity at 400 V?","answer":"Rated switching capacity is 3 A at 400 V AC, capacitor duty. That's the current you design to for a 400 V power-factor-correction bank."},{"question":"What is the coil voltage for 3RT2628-1AK65?","answer":"The coil is rated 110 V at 50 Hz and 120 V at 60 Hz — a standard dual-frequency AC coil for European and North American control voltages."},{"question":"What compliance documentation does this brand provide for 3RT2628-1AK65?","answer":"As a Siemens SIRIUS component, it carries CE marking for the European market. Specific RoHS, REACH, and UL documentation is typically available from the manufacturer's technical support or the distributor upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2628-1AK65","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/3RT2628-1AK65 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}