{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACS550-U1-072A-4","brand":"ABB","brandSlug":"abb","productSlug":"ACS550-U1-072A-4","canonicalUrl":"https://aoctrl.com/abb/ACS550-U1-072A-4","factsUrl":"https://aoctrl.com/api/mcp/products/ACS550-U1-072A-4","rawCanonicalId":null},"summary":{"shortDescription":"ABB ACS550-U1-072A-4 general-purpose drive, 3-phase, 480 VAC, 40 Hp heavy-duty / 50 Hp normal-duty, 72 A / 59 A, NEMA 1 wall-mount frame R4.","salesMarkdown":"## What the BOM line is buying The ABB ACS550-U1-072A-4 is a general-purpose AC drive in the ACS550 family, built for 3-phase operation on a 380–480 V AC supply. It is rated 40 Hp heavy duty and 50 Hp normal duty, which is the split a sourcing engineer has to lock in before the panel goes to fabrication — the heavier figure governs constant-torque loads like conveyors and positive-displacement pumps, the lighter one covers variable-torque fans and centrifugal pumps. ## Mechanical envelope and panel fit Mechanically the drive ships as a NEMA 1 wall-mount unit in frame size R4, with a 27.1\" H × 8\" W × 10.3\" D footprint. That is the same R4 cutout the rest of the 072A-class ACS550 units use, so on a like-for-like replacement the cabinet mounting pattern, conduit entry, and heatsink clearance stay consistent — what changes between frames is depth, not the wall pattern.","metaTitle":"ABB ACS550-U1-072A-4 VFD, 40 Hp, 480V 3-Phase","metaDescription":"ABB ACS550-U1-072A-4 general-purpose drive, 3-phase, 480 VAC, 40 Hp heavy / 50 Hp normal duty. Wall-mount NEMA 1 frame R4. Specified to BOM 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":"40 Hp, 50 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 50 Hp. Heavy Duty: 40 Hp. Normal Duty: 72 Amp. Heavy Duty: 59 Amp. Frame Size: R4. H: 27.1\" W: 8\" D: 10.3\"","Volts AC":"480","Horsepower":"40","description":"40 Hp, 50 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 50 Hp. Heavy Duty: 40 Hp. Normal Duty: 72 Amp. Heavy Duty: 59 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":"When sourcing the ACS550-U1-072A-4, what is the closest functional second-source from the ACS550 family?","answer":"Within the same ACS550-U1 480 V 3-phase family, the immediate sizing neighbors are the 30 Hp ACS550-U1-059A-4, the 60 Hp ACS550-U1-078A-4, and the 75 Hp ACS550-U1-097-A4. None of those is a true second-source — they are different horsepower points in the same ladder, so swapping one for another changes the motor's current margin and the branch protection sizing."},{"question":"What is the listed type for the ACS550-U1-072A-4?","answer":"General Purpose Drive."},{"question":"What phase is the ACS550-U1-072A-4 rated for?","answer":"Three-phase supply and three-phase output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/ACS550-U1-072A-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-U1-072A-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}}