Fanuc A20B-3300-0170 CPU Module

The Fanuc A20B-3300-0170 CPU Module is the main processor board for Fanuc 16i/18i CNC controllers, delivering centralized system control, logic processing, and communication management. Installed inside the CNC controller main unit, it coordinates the controller, HMI, Ethernet, and internal networks to ensure reliable motion, data handling, and coordinated machine operations. This CPU circuit board is used in CNC machining centers, lathes, milling machines, and automated production equipment where centralized control and dependable processing are essential. Key details include Manufacturer Part Number A20B-3300-0170; Series Fanuc 16i/18i Controller; Origin Japan; Weight approximately 2 kg; and Status: Discontinued / legacy component. It is commonly used by maintenance teams and system integrators for repairs, controller replacement, and restoration of Fanuc CNC equipment.