{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AL28-0PA4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AL28-0PA4","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AL28-0PA4","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AL28-0PA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1 power contactor, 3RT1025-1AL28-0PA4, AC-3 17 A, 7.5 kW/400 V, 230 V AC 50/60 Hz coil, 3-pole, 1 NO + 1 NC auxiliary, Size S0 screw terminal.","salesMarkdown":"The Siemens 3RT1025-1AL28-0PA4 is a SIRIUS 3RT1 power contactor rated for AC-3 duty at 17 A, switching 7.5 kW at 400 V. The 230 V AC coil pulls in reliably at 50/60 Hz. Three main poles handle motor loads; the 1 NO + 1 NC auxiliary contact block is integrated on the Size S0 frame. Screw terminals suit panel wiring with ferruled or solid conductors. ## Panel Integration Coil terminals are on the top face; main and auxiliary connections are clearly marked. The 1 NO + 1 NC auxiliary block is pre-wired to the contactor base — no separate assembly needed.","metaTitle":"Siemens 3RT1025-1AL28-0PA4 Power Contactor, AC-3 17 A, 7.5 k","metaDescription":"Phased-out Siemens 3RT1025-1AL28-0PA4 power contactor. AC-3 17 A, 7.5 kW/400 V, 230 V AC coil, 3-pole, 1 NO+1 NC, Size S0. Sourced to order against RFQ.","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=62903&mlfb=3RT1025-1AL28-0PA4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AL28-0PA4/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RT1025-1AL28-0PA4?","answer":"The official successor is the SIRIUS 3RT2 series. It shares the same Size S0 footprint and screw terminal layout, making it a direct DIN-rail replacement."},{"question":"Where can I buy the 3RT1025-1AL28-0PA4?","answer":"We source this phased-out order code through independent distribution — new-old-stock and surplus inventory. Submit an RFQ for current availability and pricing."},{"question":"What are the key ratings of the 3RT1025-1AL28-0PA4?","answer":"AC-3 motor-switching duty at 17 A, 7.5 kW at 400 V. Coil is 230 V AC, 50/60 Hz. Three main poles, 1 NO + 1 NC auxiliary contacts. Size S0 frame with screw terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AL28-0PA4","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/3RT1025-1AL28-0PA4 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}}