{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3G3RX2-B4900","brand":"Omron","brandSlug":"omron","productSlug":"3G3RX2-B4900","canonicalUrl":"https://aoctrl.com/omron/3G3RX2-B4900","factsUrl":"https://aoctrl.com/api/mcp/products/3G3RX2-B4900","rawCanonicalId":null},"summary":{"shortDescription":"Omron RX2 Series high-performance inverter, 3G3RX2-B4900, 120 HP constant torque, 176 A, 480 VAC 3-phase, 0.01-400 Hz, V/f/Sensorless Vector/Closed Loop Vector control, Modbus built-in, vertical mount.","salesMarkdown":"The Omron 3G3RX2-B4900 is an RX2 Series high-performance inverter rated for 120 HP constant-torque loads at 176 A on a 480 VAC 3-phase supply. It delivers a speed range from 0.01 Hz to 400 Hz with V/f, sensorless vector, and closed-loop vector control modes. The 176 A constant-torque rating (120 HP) is the drive's continuous output at full load — sized for a 120 HP induction motor on a conveyor, pump, or fan that demands full torque across the speed range. The 0.01 Hz minimum frequency means it can crawl a load at near-zero speed for positioning or jogging, while the 400 Hz top end suits high-speed spindles or centrifuge drives. Three control modes cover the spectrum: V/f for simple fan/pump applications, sensorless vector for general-purpose torque control without an encoder, and closed-loop vector for precision speed/position regulation with an encoder feedback card. Vertical mounting is specified — the drive must be oriented with its heatsink fins vertical for natural convection cooling. Installing it horizontally or flat will derate the output current; in a packed enclosure, leave the minimum clearance above and below per the manual to avoid nuisance over-temperature trips. This inverter is designed for panel mounting in industrial control cabinets. The 480 VAC 3-phase input ties directly to a motor branch circuit; the built-in Modbus RTU port connects to a PLC or SCADA for speed reference and status monitoring without an extra gateway. The flow-chart logic programming allows simple sequence control (e.g., start/stop ramps, jog, fault reset) directly in the drive, reducing the PLC I/O count for standalone applications.","metaTitle":"Omron 3G3RX2-B4900 RX2 Inverter, 120 HP, 176 A, 480 VAC","metaDescription":"Omron 3G3RX2-B4900 RX2 Series high-performance inverter. 120 HP constant torque, 176 A, 480 VAC 3-phase, 0.01-400 Hz, V/f/Sensorless Vector/Closed Loop Vector control, Modbus built","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drive (VFD) 480V"],"specifications":{"title":"3G3RX2-B4900","Mounting":"Vertical Mount","Power Phase":"3-phase","Speed range":"0.01 - 400 Hz","description":"RX2 Series High-Performance Inverter|The RX2 Series improves upon previous models to achieve greater speed, efficiency and ease of use.","Control Type":"V/f, Sensorless Vector, Close Loop Vector","Supply Voltage":"480 VAC","Starting torque":"2","lifecycle_stage":"current","Built-in Communications":"Modbus built-In","Constant Torque-Current":"176 A","Constant Torque-Horsepower":"120 HP","Flow-chart logic programming":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9a75bb12d93d9a580b770b3147aa9257.pdf","sourceUrl":"https://automation.omron.com/en/us/products/family/3g3rx2"},"ai":{"faq":[{"question":"What is the closest alternative to the 3G3RX2-B4900 in the RX2 family?","answer":"Within the RX2 series, the closest alternative would be a drive with the same voltage class (480 VAC 3-phase) and similar constant-torque current rating. The 3G3RX2-B4900 is a specific current/HP point; stepping up or down within the series changes the frame size and mounting footprint. Verify the replacement's continuous current rating matches your motor FLA and that the mounting orientation is compatible."},{"question":"What mounting orientation is specified for the 3G3RX2-B4900?","answer":"Vertical mount is required — the drive must be installed with the heatsink fins vertical to allow proper airflow for cooling."},{"question":"What power phase does the 3G3RX2-B4900 require?","answer":"It requires a 3-phase input supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/3G3RX2-B4900","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/3G3RX2-B4900 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}}