{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2646-1AB03","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2646-1AB03","canonicalUrl":"https://aoctrl.com/siemens/3RT2646-1AB03","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2646-1AB03","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS capacitor contactor, S3 frame, 24 V AC coil, screw-type terminals, 80 mm width, 140 mm height, 152 mm depth, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward or backward — useful when panel layout forces an unconventional orientation. The contactor is rated to switch 6 A at 24 V AC and 6 A at 230 V AC, with a maximum operating rate of 150 switching cycles per hour at 230 V. At 400 V AC it handles 3 A at up to 80 cycles per hour. The arcing time falls between 10 and 20 ms — typical for this class of capacitor switching, where the inrush from discharged caps can be several times the steady-state rating. The solid conductor capacity goes up to 4 mm² on the auxiliary side and 70 mm² stranded on the main power terminals, so it accepts the cable sizes common in power factor correction sub-panels.","metaTitle":"Siemens 3RT2646-1AB03 SIRIUS Capacitor Contactor, S3, 24 V A","metaDescription":"Siemens 3RT2646-1AB03 SIRIUS capacitor contactor, S3 frame, 24 V AC coil, screw terminals, 80x140x152 mm. Active lifecycle, available to order. Get current pricing via RFQ.","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":"24 V","Instantaneous Contact":"1","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":"1","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":"0.61","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/a19e4d23437fc704d4d1d6e960e4f89e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=915512&mlfb=3RT2646-1AB03","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2646-1AB03/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT2646-1AB03?","answer":"The 3RT2036-1AC20-ZX95 is a peer SIRIUS contactor but uses a 24 V AC coil in a different frame size (S2 vs S3). The physical footprint and terminal capacity differ — the S3 frame (80 x 140 x 152 mm) is larger than the S2, so a direct drop-in without rewiring is not guaranteed. Verify the panel cutout and wire gauge before substituting."},{"question":"Where can I buy 3RT2646-1AB03 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for this exact order code."},{"question":"What wire sizes does 3RT2646-1AB03 accept?","answer":"Solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), 2x 4 mm². Stranded: 2x (10...70 mm²) or 1x (10...70 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2646-1AB03","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/3RT2646-1AB03 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}}