Sumitomo Electric Industries AF504-2A2 Transistor Inverter

Sumitomo's AF504-2A2 Transistor Inverter is a compact AF-500 series drive that provides precise three-phase motor control from a 460V supply, using fast-switching transistors to deliver smooth start-up, speed ramping, and torque modulation in demanding industrial automation environments. Designed for retrofit or new installations, this inverter consolidates power electronics, control logic, and protection features into a single compact enclosure suitable for panel mounting in constrained spaces. Specifically, AF504-2A2 is rated for 460V three-phase input with an output rating of 4.8 kVA / 2.2 kW (approximately 3 HP) and a 6 A current draw, aligning with small-to-mid-size motors used on conveyors, pumps, and machine tools in manufacturing lines; the model is part of Sumitomo's legacy AF-500 family, known for robust performance and compatibility with standard field signals. Physical dimensions are 9.5 inches wide by 8.0 inches tall by 5.0 inches deep, with a mass of about 21 lb 8 oz (9.8 kg); the AF504-2A2 is manufactured in Japan, and it carries the Sumitomo AF-500 designation, reflecting its place in the company's transistor inverter lineup.