{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2626-1BF45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2626-1BF45","canonicalUrl":"https://aoctrl.com/siemens/3RT2626-1BF45","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2626-1BF45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2626-1BF45 capacitor contactor, Size S0, DC coil 110 V, screw-type terminals, 45 mm width, 165 mm depth, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## What this capacitor contactor is for The 3RT2626-1BF45 is a Siemens SIRIUS capacitor contactor — a dedicated switching device for capacitor banks in power factor correction (PFC) panels. Unlike a standard contactor, it is designed to handle the high inrush current when energising a capacitive load without welding its main contacts. The Size S0 footprint — 45 mm wide, 135 mm high, 165 mm deep — fits standard panel layouts and leaves room for adjacent PFC components. ## DC coil ratings — the so-what for your control circuit The coil is DC-operated, rated 110 V nominal with a pick-up threshold of 0.8 × rated value (88 V) and a drop-out at 1.1 × rated (121 V). That means the coil holds in reliably down to about 88 V and releases cleanly at 121 V — important for systems with long cable runs or voltage droop during motor starting. These are the maximum currents the main contacts can break in DC circuits — a common trip point for engineers who assume AC ratings carry over. In DC, arc extinction is harder, so the current limit drops sharply as voltage rises. Arcing time is a tight 10–10 ms, and the contactor can switch at up to 100 operations per hour across the voltage range from 230 V to 690 V. That 100 1/h ceiling is the same for all listed AC voltages — useful when sizing for repetitive capacitor bank switching in PFC cycles. ## Termination and wiring The coil and main terminals are screw-type, accepting solid or stranded wire. Stranded: 2× (1–2.5 mm²) or 2× (2.5–10 mm²). The range covers common panel wiring sizes up to 10 mm² — enough for most capacitor bank connections. Auxiliary contacts: one instantaneous contact is built in (no add-on block needed for basic feedback). The contactor also accepts attachable auxiliary switch blocks (0 attachable as standard — the integrated contact is the only one). ## Environmental and mounting flexibility That means it fits into tight or oddly oriented enclosures without derating. Coil operation time at DC is 15–18 ms — fast enough for most PFC switching sequences but not so fast that it causes mechanical bounce issues on the capacitor load.","metaTitle":"Siemens 3RT2626-1BF45 SIRIUS Capacitor Contactor","metaDescription":"Siemens 3RT2626-1BF45 SIRIUS capacitor contactor, Size S0, DC coil 110 V, screw terminals, 165 mm depth. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"165 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","at DC":"15 ... 18 ms","Height":"135 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 690 V":"1 A","at 40 °C":"1x 10 mm²","at 60 °C":"2x 10 mm²","Attachable":"0","Arcing Time":"10 ... 10 ms","Rated Value":"110 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"DC","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","Full-Scale Value":"1.1","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":"100 1/h","at 500 V maximum":"100 1/h","at 600 V maximum":"100 1/h","at 690 V maximum":"100 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","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","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","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)":"200 000","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","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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":"16 ... 8","For Short-Circuit Protection Of The Main Circuit With Type Of Coordination 1 Required":"gG: 63 A (690 V, 50 kA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"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=150947&mlfb=3RT2626-1BF45","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2626-1BF45/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2626-1BF45 and get a price?","answer":"No stock-holding claim is made here."},{"question":"What are the DC switching ratings for 3RT2626-1BF45?","answer":"These are the maximum break currents — not the same as AC ratings — so verify against your DC load before specifying."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2626-1BF45","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/3RT2626-1BF45 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}}