FANUC A20B-1005-0420 PSU

  • Power Supply PCB (type C / type B)
  • 24 VDC input (FS-18B, 21B, 210B)
  • Exchange in stock. $595.00 USD
  • 24 hour repair turnaround

12 month warranty, same day ship

SKU: A20B-1005-0420 Category:



The A20B-1005-0420 Fanuc power supply pcb is fitted on a number of controls. It is known as a type C power supply for the 16-B, 18-B (though normally single or dual slot backplane 18-TB, 18-MB); and as the type B as the large capacity PSU or power board for the 21-B and 210-B controls.

This GE Fanuc series power supply PCB piggy backs onto the I/O PSU board on the 21B/18B controls. Its a 24VDC input, not requiring the relay (input) stage of its predecessors; due to the lower power consumption of the control systems it powers.

Benefits of ordering A20B-1005-0420 from CNC West ?

CNC West offer extensive services for Fanuc power supply units. This C or B type power supply pcb (18B or 21B type respectively) is tested prior to be supplied on an exchange basis prior to being shipped to customers.

The Fanuc A20B-1005-0420 is part of a system designed to make it easy to integrate into your manufacturing facilities. Furthermore, this device is lightweight at less than 1lb. The product carries with a one-year warranty so if you have any problems, you’ll be able to get it repaired or replaced if problems occur within a year of purchase.

Our shipping, repair, testing policies: A20B-1005-0420.

If you ever need to get this product repaired, we’ll endeavour to fix it within 24 hours or less. This is not considered a rush or urgent service. Our repair services are also covered by the product’s one-year warranty. If you order this product from us before 3.00PM and its in stock; then we should be able to ship same day. Similar to our ability to repair, we also offer testing of this C or B type PSU. Check our Fanuc alarm pages for known issues.


The Fanuc A20B-1005-0420 is used extensively within CNC manufacturers machines with its sibling PSU 0421 being far more popular. Normally found on the following series as C type for FS-18TB, FS-18GB, and B type for FS-21TB, FS-21MB, 210TB and 210MB control systems. This type of control system is commonly used in manufacturing facilities that use robotics, and the device is used in numerous industries.

Interested in learning more? Contact us if you wish to discuss options for surplus, exchange or repair of your A20B-1005-0420 at (619) 477-9011 or by email at sales@cnc-electronics.net. We’d be happy to answer your questions and give you a free copy of our 2020 catalog!

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