{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2645-1AP05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2645-1AP05","canonicalUrl":"https://aoctrl.com/siemens/3RT2645-1AP05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2645-1AP05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2645-1AP05 capacitor contactor, size S3, 3-pole, 6 A rated operational current at 230 V AC, screw-type coil terminals, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## Capacitor switching — what the ratings mean The 3RT2645-1AP05: This is a SIRIUS capacitor contactor, not a general-purpose one. The maximum switching frequency falls off sharply as voltage rises: 200 operations per hour at 230 V, 100 at 400 V, and only 40 at 690 V. This derating is driven by the thermal recovery time of the arc chamber after a capacitive break — pushing the rate above the curve shortens contact life. Opening time is 10-21 ms with an arcing time of 10-20 ms. For power factor correction panels, this means the contactor clears before the upstream fuse or breaker sees a sustained fault — coordination is inherent at these speeds. ## Panel fit and wire termination Size S3 frame — 80 mm wide, 140 mm tall, 152 mm deep. Main poles accept stranded wire: 2x 10-70 mm² or 1x 10-70 mm². The coil and auxiliary terminals take solid or stranded 0.5-4 mm² — screw-type only, no push-in. Torque to the Siemens spec on the nameplate; the screw terminals hold up to repeated re-termination better than spring clips in a packed enclosure. The 60 °C ceiling is typical for a ventilated panel — derate the switching frequency if the enclosure ambient pushes above 40 °C.","metaTitle":"Siemens 3RT2645-1AP05 SIRIUS Capacitor Contactor, 6 A AC-6b","metaDescription":"Siemens 3RT2645-1AP05 SIRIUS capacitor contactor, size S3, 6 A rated at 230 V AC, screw terminals. Active production, sourced to order. RFQ for volume pricing.","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 50 mm²","at 60 °C":"2x 35 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":"200 1/h","at 240 V maximum":"200 1/h","at 400 V maximum":"100 1/h","at 480 V maximum":"60 1/h","at 500 V maximum":"60 1/h","at 600 V maximum":"40 1/h","at 690 V maximum":"40 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":"230 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)":"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","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/3b5b5d30379980980bb9474b2c323401.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=915508&mlfb=3RT2645-1AP05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2645-1AP05/alternatives.json"},"ai":{"faq":[{"question":"How can I order the 3RT2645-1AP05 or get a quote?","answer":"Submit an RFQ for the 3RT2645-1AP05."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2645-1AP05","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/3RT2645-1AP05 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}}