{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2646-1AF05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2646-1AF05","canonicalUrl":"https://aoctrl.com/siemens/3RT2646-1AF05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2646-1AF05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2646-1AF05 capacitor contactor, size S3, 110 V AC 50 Hz coil, screw-type terminals, 3-pole, DIN rail mount.","salesMarkdown":"## Capacitor switching contactor, S3 frame, 110 V AC coil The Siemens 3RT2646-1AF05 is a SIRIUS capacitor contactor in the S3 size class, designed specifically for switching capacitor banks in power factor correction (PFC) applications. It carries a 110 V AC 50 Hz coil with screw-type terminals. ## Switching frequency and thermal limits Maximum switching rate is voltage-dependent: 150 operations per hour at 230/240 V, 80 ops/h at 400 V, and 30 ops/h at 690 V — the capacitor discharge time between cycles governs the limit, not the contactor's mechanical life. At 40 °C ambient, a single 70 mm² conductor is sufficient; at 60 °C, two 50 mm² conductors in parallel are required to carry the same current without exceeding the terminal temperature rise. ## Mounting and auxiliary contact provisions Accepts one attachable auxiliary contact block (screw-type), expanding the switching functionality for status feedback or interlocking in the capacitor bank controller circuit. Dimensions: 80 mm wide, 140 mm high, 152 mm deep — the S3 frame footprint is standard across the SIRIUS contactor family, so panel cutouts and busbar layouts transfer if you swap between a standard motor contactor and this capacitor-rated variant.","metaTitle":"Siemens 3RT2646-1AF05 SIRIUS Capacitor Contactor, S3","metaDescription":"Siemens 3RT2646-1AF05 SIRIUS capacitor contactor, size S3, 110 V AC 50 Hz coil. Screw terminals, DIN rail mount. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"80 mm","at AC":"10 ... 21 ms","Height":"140 mm","at 24 V":"6 A","at 60 V":"2 A","Stranded":"2x (10 ... 70 mm²), 1x (10 ... 70 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":"0 A","at 40 °C":"1x 70 mm²","at 60 °C":"2x 50 mm²","Attachable":"1","Arcing Time":"10 ... 20 ms","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":"150 1/h","at 240 V maximum":"150 1/h","at 400 V maximum":"80 1/h","at 480 V maximum":"53 1/h","at 500 V maximum":"53 1/h","at 600 V maximum":"32 1/h","at 690 V maximum":"30 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":"S3","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 V","Instantaneous Contact":"0","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Substance Prohibitance (Date)":"06/26/2017","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":"Yes","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)":"120 000","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":"19 VA","apparent pick-up power of magnet coil at AC":"296 VA","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"0","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":"0.61","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.38","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":"8","For Short-Circuit Protection Of The Main Circuit With Type Of Coordination 1 Required":"gG: 250 A (690 V, 50 kA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b4fa1ee052798965ea6ca805bf459cf2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=915515&mlfb=3RT2646-1AF05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2646-1AF05/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RT2646-1AF05 used for?","answer":"It is a capacitor contactor for switching capacitor banks in power factor correction (PFC) panels. The S3 frame and 110 V AC coil suit it for low-voltage distribution boards where automated PFC is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2646-1AF05","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/3RT2646-1AF05 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}}