{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACS550-U1-031A-4","brand":"ABB","brandSlug":"abb","productSlug":"ACS550-U1-031A-4","canonicalUrl":"https://aoctrl.com/abb/ACS550-U1-031A-4","factsUrl":"https://aoctrl.com/api/mcp/products/ACS550-U1-031A-4","rawCanonicalId":null},"summary":{"shortDescription":"ABB ACS550 series wall-mount AC drive, ACS550-U1-031A-4, UL Type/NEMA 1 enclosure, 3-phase 380-480 VAC output at 31 A / 15 kW.","salesMarkdown":"## What the order code resolves to The ACS550-U1-031A-4: At 14.47 kg, the unit is a one-person lift onto a wall bracket inside a control room — the practical concern at this mass is mounting hardware and torque on the wall anchors, not shipping weight. If the line is down and the spare is in stores, plan on one technician to set it and a second to land the power leads; the output wiring side is the heavier work. ## What the headline ratings decide The output rating of 31 A at 380-480 VAC, 50/60 Hz is the figure the application engineer works against: it sets the upper limit for constant-torque loads on a 15 kW motor, and it is also the number the upstream breaker and the output cable sizing have to clear. Below the output figure, the ACS550 family is a general-purpose sensorless vector drive class — sized for fans, pumps, conveyors and similar industrial loads at the 15 kW node, not for high-inertia or vertical-axis applications without braking consideration. Cable-side planning for a 480 V drive is the next decision after the rating: longer motor leads call for a dV/dt or sine filter, while shorter runs land direct.","metaTitle":"ABB ACS550-U1-031A-4 drive, 31 A, 15 kW, 480 V","metaDescription":"ABB ACS550-U1-031A-4 wall-mount AC drive, 3-phase 380-480 VAC at 31 A / 15 kW in a UL Type/NEMA 1 enclosure, sourced to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drive (VFD) 480V"],"specifications":{"Part #":"ACS550-U1-031A-4","Weight":"14.47 kgs","Category":"Drives","Option 1":"UL Type/NEMA 1","Option 2":"UL Type/NEMA 1","Construction":"US Installation and NEMA Compliance","Sub Category":"Motor Drives","Top Category":"Motors & Motor Controls","lifecycle_stage":"eol_hot","Output Current Rating":"Three-Phase, 380-480 VAC, 50/60 HZ, 31 A, 15 KW"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/ACS550-U1-031A-4/alternatives.json"},"ai":{"faq":[{"question":"Is the ACS550-U1-114A-2 a drop-in second source for the ACS550-U1-031A-4?","answer":"No. The ACS550-U1-114A-2 is the same wall-mount NEMA 1 family but at 208-240 VAC, 114 A, 30 kW — a different voltage node, a different current node, and a different kW node. A panel cut out around the ACS550-U1-114A-2 does not take the ACS550-U1-031A-4 without a different line feed and branch protection."},{"question":"What enclosure class is the ACS550-U1-031A-4?","answer":"UL Type/NEMA 1, built for US installation and NEMA compliance — a clean indoor control-room enclosure class, not a washdown or outdoor rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/ACS550-U1-031A-4","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/ACS550-U1-031A-4 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}}