{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACS550-U1-246A-4","brand":"ABB","brandSlug":"abb","productSlug":"ACS550-U1-246A-4","canonicalUrl":"https://aoctrl.com/abb/ACS550-U1-246A-4","factsUrl":"https://aoctrl.com/api/mcp/products/ACS550-U1-246A-4","rawCanonicalId":null},"summary":{"shortDescription":"ABB ACS550-U1-246A-4 ACS550 series general purpose drive, 3-phase 480 V AC supply, 150 hp heavy duty / 200 hp normal duty, NEMA 1 wall mount, frame R6.","salesMarkdown":"## What you're actually bolting to the wall The ABB ACS550-U1-246A-4 is a general-purpose variable-frequency drive in the ACS550 series, fed from a 3-phase 480 V AC supply and rated for 150 hp heavy duty or 200 hp normal duty on a three-phase induction motor load. It ships as a NEMA 1 wall-mount package in frame size R6, with the enclosure at 35.0 in H x 11.9 in W x 15.8 in D. The 380 to 480 V AC input window is the standard ACS550 industrial envelope, so it lands directly on a 480 V three-phase feeder without a step-down transformer; what changes between the U1 (wall-mount, NEMA 1) and the U2 (flange-mount) styles in this family is the mechanical envelope, not the electrical class. ## Read the two amp ratings the right way Heavy duty on this code is 192 A and normal duty is 245 A — those are not the same motor. The panel-builder rule on the ACS550 line is to pick the duty class first, then read the matching amp figure: a constant-torque load (conveyors, extruders, positive-displacement pumps) sizes to the 192 A heavy-duty figure, while fan, blower, and centrifugal-pump curves can ride the 245 A normal-duty rating because the drive is allowed to assume a variable-torque profile. The horsepower label on the front of the cabinet (150 hp) is the heavy-duty headline; the 200 hp figure only applies when the application can live inside the normal-duty thermal envelope. Sizing a 200 hp constant-torque load to this part because the normal-duty number is the bigger one is the usual misread and is the first thing I check when a line is faulting on IGBT overtemperature. ## Frame R6 — what it costs you in the panel Frame R6 is 35.0 in H x 11.9 in W x 15.8 in D on the U1 wall-mount style. The 15.8 in depth plus line and load conductor bend radius has to be cleared in the cabinet before the U1 lands on the wall.","metaTitle":"ABB ACS550-U1-246A-4 drive, 150 hp, 480 V 3-phase","metaDescription":"ABB ACS550-U1-246A-4 general purpose drive, 150 hp heavy duty / 200 hp normal duty on 380-480 V AC three-phase, NEMA 1 wall mount, frame R6. 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":"150 Hp, 200 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 200 Hp. Heavy Duty: 150 Hp. Normal Duty: 245 Amp. Heavy Duty: 192 Amp. Frame Size: R6. H: 35.0\" W: 11.9\" D: 15.8\".","Volts AC":"480","Horsepower":"150","description":"150 Hp, 200 Hp, ACS550, VFD, N1|3-Phase Supply Voltage, 380 - 480V AC, NEMA 1, Wall Mount Drive. 3-Phase Output, Normal Duty: 200 Hp. Heavy Duty: 150 Hp. Normal Duty: 245 Amp. Heavy Duty: 192 Amp. Frame Size: R6. H: 35.0\" W: 11.9\" D: 15.8\".","Family / Style":"ACS550","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 and phase is the ACS550-U1-246A-4?","answer":"It is listed as a general-purpose drive, three-phase, on a 480 V AC supply, in the ACS550 family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/ACS550-U1-246A-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-U1-246A-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}}