{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2628-1AP65","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2628-1AP65","canonicalUrl":"https://aoctrl.com/siemens/3RT2628-1AP65","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2628-1AP65","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2628-1AP65 capacitor contactor, size S0, 45 mm width, 150 mm height, 155 mm depth, screw-type terminals, 230 V AC coil, 6 A switching current at 230 V, 3 A at 400 V, DIN rail mount.","salesMarkdown":"## Capacitor switching duty — what the ratings deliver The 3RT2628-1AP65: This is a SIRIUS capacitor contactor, purpose-built for switching power factor correction capacitor banks. These are the currents the contactor can make and break for capacitor loads — the inrush from charging capacitors can be 20-30x rated current, so the contactor's arc-chamber design handles that stress. The arcing time is a tight 10 ms typical, with AC switching time between 4 and 16 ms — fast enough for most capacitor switching cycles. ## Switching frequency derating — the voltage-speed tradeoff Maximum switching frequency drops as voltage rises: 100 operations per hour at 230/240/400 V, 70/h at 480 V, 65/h at 500 V, 45/h at 600 V, and 36/h at 690 V. This is the thermal limit of the contactor — pushing more cycles at higher voltage overheats the arc chamber. For PFC banks with frequent switching, stay under these ceilings. At 40 °C ambient, the maximum cable cross-section is 16 mm² solid; at 60 °C it drops to 25 mm² — the derating curve matters for panel wiring at the top of the enclosure. Stranded takes 2x (1-2.5 mm²) or 2x (2.5-10 mm²). Coil terminals are screw-type, rated for the 220-240 V AC coil at 50/60 Hz. ## Mounting flexibility and panel integration This means it fits in tight enclosures where the DIN rail is oriented oddly — but the contactor's internal arc path is designed for vertical orientation, so tilting beyond 22.5° may affect switching performance at high currents. No auxiliary contact blocks are attachable (0 attachable), so all auxiliary switching must come from external relays or the PLC output. Plan for that in the BOM.","metaTitle":"Siemens 3RT2628-1AP65 SIRIUS Capacitor Contactor, S0","metaDescription":"Siemens 3RT2628-1AP65 SIRIUS capacitor contactor, size S0, 45x150x155 mm. Switches 6 A at 230 V AC, 3 A at 400 V AC. Screw terminals, DIN rail mount.","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":"3RT2628-1AP65","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, 220 V AC, 50 Hz / 240 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":"220 ... 220 V","at 60 Hz rated value":"240 ... 240 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 AC at 230 V maximum permissible":"7 mA","At Contactor For Auxiliary Contacts":"Screw-type terminals","for 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=646320&mlfb=3RT2628-1AP65"},"ai":{"faq":[{"question":"What does the 6 A at 230 V rating mean for capacitor bank sizing?","answer":"For a 230 V single-phase capacitor bank, this corresponds to roughly 1.4 kVAR (6 A × 230 V). At 400 V three-phase, the 3 A rating supports about 2 kVAR per phase. The contactor's inrush capability handles the capacitor charging surge, but the thermal rating sets the steady-state limit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2628-1AP65","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/3RT2628-1AP65 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}}