A20B-2101-0392 Fanuc Servo Power Supply Board

The A20B-2101-0392 is a Fanuc servo power supply board used in CNC systems where stable high-power supply support is essential for reliable machine operation. Identified as PCB - Alpha i PSM New Hi Power, this board is associated with 6110 and 6120 HV series servo power supply modules and is designed for 400-480 VAC applications.

In real production use, power supply boards like the A20B 2101 0392 play a much bigger role than they first appear to. When the power side of the system becomes unstable, the machine may show drive-related problems, startup faults, or wider electrical instability that affects normal operation. That is why the correct board matters so much in actual maintenance work.

At REACO CNC, we supply dependable Fanuc parts for customers who need replacement power supply boards, backup stock, or Fanuc repair support for installed CNC systems.

The A20B-2101-0392 Fanuc PCB is specifically used with 6110 and 6120 HV series servo power supply modules, making it especially relevant in applications where the original Alpha i power supply structure must be preserved. For many maintenance teams, using the correct board is the simplest way to restore stable electrical support without introducing unnecessary compatibility issues.

A key point for this model is that the A20B-2101-0392 is used as a replacement for A20B-2100-0762. That replacement relationship is important in real procurement and repair work, because many customers search by the older part number and need confirmation that the newer board is the correct substitute.

This board is commonly associated with:

• Fanuc Alpha i power supply applications
• 6110 and 6120 HV series servo power supply modules
• High-voltage CNC power support
• Maintenance and rebuild projects
• Service work requiring original-compatible Fanuc control PCBs

It may also be sourced together with related power supply modules, servo amplifier units, spindle drive units, Fanuc controller boards, and other CNC electronic assemblies during broader repair work.

Depending on stock availability, this board may be supplied in:

• New condition
• Refurbished condition
• Used condition

For many customers, refurbished stock is a practical option because it offers dependable replacement support while helping control both lead time and cost. This is especially useful when the machine is still productive and the goal is to restore stable power performance as quickly as possible.

Customers usually look for the A20B-2101-0392 when they need:

• A direct replacement for a faulty servo power supply board
• Support for 6110 / 6120 HV series power supply modules
• Confirmation that it replaces A20B-2100-0762
• Reliable Fanuc stock for important machines
• Access to dependable Fanuc parts for maintenance and repair
• Help deciding between replacement and Fanuc repair

In real factory environments, having the correct power supply board available can save a great deal of time, especially when system instability is coming from the high-power side of the control setup.

REACO CNC supports both direct replacement supply and Fanuc repair inquiries. If your original A20B-2101-0392 is damaged, we can help review whether repair is practical or whether replacement is the better route based on stock, condition, and urgency.

We also support sourcing for related Fanuc parts, including power supply boards, power modules, main boards, interface modules, servo amplifier units, spindle drive units, and other CNC electronic assemblies used in installed Fanuc systems.

For many shops, electrical stability is the foundation of reliable machine operation. A correct A20B 2101 0392 replacement can help restore stable power support, preserve the original Alpha i system layout, and reduce unnecessary downtime in production.

FAQ

What is A20B-2101-0392?
It is a Fanuc servo power supply board used in CNC systems.

What is this board identified as?
It is identified as PCB - Alpha i PSM New Hi Power.

What modules is this board used with?
It is used with 6110 and 6120 HV series servo power supply modules.

What voltage range is listed for this board?
It is listed for 400-480 VAC applications.

Does A20B-2101-0392 replace another part number?
Yes. It is listed as a replacement for A20B-2100-0762.

Can A20B-2101-0392 be repaired?
Yes. Repair may be possible depending on the board condition and fault type.

Do you provide worldwide shipping?
Yes. We supply Fanuc parts to customers around the world.

Need pricing or availability for A20B-2101-0392?
Contact REACO CNC for stock status, repair support, and worldwide shipping options.