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| Place of Origin | JAPAN |
| Brand Name | FANUC |
| Certification | CE RoHS |
| Model Number | A20B-2004-0511 |
The A20B-2004-0511 is a FANUC circuit board in the A20B-2004 family. Parts listings consistently identify it as a FANUC circuit board, and some inventory catalogs place it among I/O board stock and servo-control / drive-related board inventories.
That gives the model a clear board-level role inside installed FANUC automation and CNC hardware, even when listings do not provide a longer functional title.
In service work, this type of board is usually handled as an exact-match replacement rather than a generic electronic spare.
Listings for this model also mention that firmware or series details may matter, which is a common requirement when replacing board-level parts inside established control systems.
| Parameter | Value |
|---|---|
| Part Number | A20B-2004-0511 |
| Manufacturer | FANUC |
| Product Type | Circuit Board / PCB |
| Product Series | A20B-2004 |
| Inventory Category Seen in Listings | Circuit board, I/O board, servo-control related board stock |
| Service Note Seen in Listings | Firmware or series may require confirmation |
| Weight Reference Seen in Listings | 1 lb |
This board is suitable for installed FANUC control systems where the existing hardware already uses the A20B-2004-0511 board position.
It is especially relevant in controller repair, board refurbishment, and replacement work where the original board family and installed hardware structure need to stay unchanged.
Before ordering, confirm the installed board code and check whether the machine or controller requires the same A20B-2004-0511 board and the same related firmware or series level. When a board is stocked under I/O and servo-control inventories, exact installed model matching is the safest replacement approach.
Q1: What kind of board is A20B-2004-0511?
It is a FANUC circuit board module. Listings consistently describe it as a board-level FANUC part, and some catalogs place it under I/O-board and servo-control-related inventories, which helps define its role inside established FANUC hardware.
Q2: Why is exact part-number matching important for this model?
Because board-level replacements inside CNC and automation controls need to preserve the original hardware role, internal connections, and system compatibility.
Listings for this model also note that firmware or series alignment may matter, so replacing it by appearance alone is not a good practice.
Q3: Is this a main board?
Listings do not consistently present it as a main board. They identify it more generally as a circuit board, with some inventories grouping it under I/O board and servo-control stock instead.
That means it is better treated as a board-level module rather than assumed to be the system motherboard.
Q4: What kind of systems is this board associated with?
It appears in FANUC board inventories tied to industrial control, CNC, and servo-related spare-parts channels.
That makes it relevant to installed FANUC systems where the same board family is already in service.
Q5: What should be checked before buying?
Check the part number on the installed board, confirm the system uses A20B-2004-0511, and verify whether the replacement must match a specific firmware or series version.
Those checks are especially important on board-level FANUC spares.
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