{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2637-1AV05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2637-1AV05","canonicalUrl":"https://aoctrl.com/siemens/3RT2637-1AV05","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1AV05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2637-1AV05 capacitor contactor, AC-6b 75 kVAr / 400 V, 3-pole, 400 V AC 50 Hz, auxiliary contacts: 2 NC, screw terminal, size S2.","salesMarkdown":"## Capacitor switching contactor, AC-6b rated 75 kVAr at 400 V The Siemens 3RT2637-1AV05 is a 3-pole capacitor contactor from the SIRIUS series, size S2, designed specifically for switching capacitor banks in power factor correction (PFC) systems. Its AC-6b duty rating of 75 kVAr at 400 V AC, 50 Hz means it handles the inrush current peaks typical when energizing a capacitor bank — up to 100× the rated current for a few milliseconds — without welding the main contacts. The built-in 2 NC auxiliary contacts (screw terminal) can be wired into the controller logic to confirm the contactor state or interlock with the main breaker. The screw terminals accept 0.5–16 mm² conductors (solid or ferruled stranded). The 400 V AC coil is 50 Hz only — verify supply frequency before wiring; a 60 Hz coil variant would carry a different order code. The capacitor bank connects to the main poles; the NC aux contacts are available on terminals 21-22 and 31-32.","metaTitle":"Siemens 3RT2637-1AV05 Capacitor Contactor, AC-6b 75 kVAr, 40","metaDescription":"Siemens 3RT2637-1AV05 capacitor contactor, AC-6b 75 kVAr at 400 V, 3-pole, 400 V AC 50 Hz, 2 NC aux contacts, screw terminal, size S2. Current lifecycle stage. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/349536b69b1b34c70e61810c104c7947.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1687157&mlfb=3RT2637-1AV05","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1AV05/alternatives.json"},"ai":{"faq":[{"question":"What is the AC-6b rating of 3RT2637-1AV05?","answer":"It is rated AC-6b 75 kVAr at 400 V, 50 Hz, which is the standard duty for switching capacitor banks in power factor correction panels."},{"question":"Where can I buy 3RT2637-1AV05?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2637-1AV05","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/3RT2637-1AV05 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}}