{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACS550-U1-078A-4","brand":"ABB","brandSlug":"abb","productSlug":"ACS550-U1-078A-4","canonicalUrl":"https://aoctrl.com/abb/ACS550-U1-078A-4","factsUrl":"https://aoctrl.com/api/mcp/products/ACS550-U1-078A-4","rawCanonicalId":null},"summary":{"shortDescription":"ABB ACS550 general-purpose drive, 480 V 3-phase supply, 60 Hp normal duty / 50 Hp heavy duty at 77 A / 72 A, frame R4, NEMA 1 wall-mount enclosure.","salesMarkdown":"## What the line is ordering The ABB ACS550-U1-078A-4 sits in the ACS550 general-purpose drive family as a 480 V 3-phase unit rated at 60 Hp. The supply range of 380–480 V AC is what carries the panel-builder through 50 Hz and 60 Hz mains without a transformer tap, and the NEMA 1 wall-mount at frame R4 keeps the drive out in the equipment room rather than inside a sealed cabinet. Two duty ratings share one order code. Normal duty is 60 Hp at 77 A; heavy duty is 50 Hp at 72 A. Constant-torque or cyclic overload loads should be planned against the 72 A curve. Frame R4 mechanical envelope is 27.1\" H × 8\" W × 10.3\" D. Wall-mount footprint, so the integrator plans for the heatsink mass on the back-plane rather than DIN-rail clearance inside a subpanel. ## Where this frame sits in the panel Three-phase output, dual-duty current rating, and the R4 frame size together point to mid-sized process lines — pump skids, fan arrays, extruder auxiliaries, and conveyor headers that need both normal-duty headroom and heavy-duty torque margin on the same BOM line.","metaTitle":"ABB ACS550-U1-078A-4 VFD, 480V 3-Ph, 60 Hp","metaDescription":"ABB ACS550-U1-078A-4 general-purpose drive, 480 V 3-phase, normal duty 60 Hp at 77 A, heavy duty 50 Hp at 72 A, frame R4, NEMA 1 wall-mount. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drive (VFD) 480V"],"specifications":{"Type":"General Purpose Drive","Phase":"3","title":"50 Hp, 60 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 60 Hp. Heavy Duty: 50 Hp. Normal Duty: 77 Amp. Heavy Duty: 72 Amp. Frame Size: R4. H: 27.1\" W: 8\" D: 10.3\"","Volts AC":"480","Horsepower":"60","description":"50 Hp, 60 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 60 Hp. Heavy Duty: 50 Hp. Normal Duty: 77 Amp. Heavy Duty: 72 Amp. Frame Size: R4. H: 27.1\" W: 8\" D: 10.3\"","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/51c35cb14b7edab5a06d09f26d554d90.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What type is listed for ACS550-U1-078A-4?","answer":"General Purpose Drive."},{"question":"What phase is ACS550-U1-078A-4?","answer":"3-phase, on a 480 V AC supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/ACS550-U1-078A-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-U1-078A-4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}