FANUC A20B-8100-0851 Power Supply PCB for i Series Model B CNC Control Unit

Correct A20B-8100-0851 Product Classification

FANUC documentation identifies A20B-8100-0851 as the power unit installed at the power-supply position of a stand-alone i Series Model B CNC control unit. As a board-level component, the clearest purchasing description is Power Supply PCB / Control-Unit Power Board.

This is not a general-purpose commercial power supply or a complete servo or spindle power supply module. Its application is tied to the original FANUC CNC control-unit hardware.

Documented i Series Model B Environment

The FANUC manual covers stand-alone Series 16i/160i/160is, 18i/180i/180is and 21i/210i/210is Model B configurations. The exact CNC basic unit, main CPU board and installed options must still be checked before treating A20B-8100-0851 as the correct replacement.

Power Board Replacement Check

The FANUC table confirms the drawing number and power-unit function but gives no voltage or current rating for this PCB. Do not add assumed electrical specifications or select a board from appearance alone.

• Confirm the complete code A20B-8100-0851
• Match the CNC series, basic-unit number and control configuration
• Compare PCB edition, suffix, mounting points and connector layout
• Have qualified personnel isolate power and complete installation checks

Order a Tested FANUC Power Supply PCB

Browse FANUC PCBs or the wider FANUC CNC and robot parts range. Send REACO CNC photos of the original power board, labels and connectors for model checking.

• 100% Function Tested Before Shipment
• Worldwide DHL / UPS / FedEx Shipping
• Contact REACO CNC for Current Stock, Price and Lead Time