PCB Board A20B-3300-0050 A2OB-33OO-OO5O A20B33000050
A20B-3300-0050 | FANUC A20B-3300 Series CNC PCB — 005x CPU or Control Board / Industrial Automation Spare
A20B-3300 — FANUC's CNC Processor and CPU Card Series
The A20B-3300 series is one of the most active FANUC PCB families in this session — confirmed across a wide range of CNC processor cards, CPU modules, and memory/processing boards spanning multiple CNC generations:
| Representative Range | Confirmed Boards |
|---|---|
| 005x | A20B-3300-0050 — this product |
| 029x | A20B-3300-0293 (486 CPU Module, 16MB DRAM) |
| 031x | A20B-3300-0311, 0312, 0313, 0317, 0319 |
| 033x | A20B-3300-0331, 0341 |
| 039x–042x | A20B-3300-0391, 0393, 0420, 0440, 0442, 0445, 0448 |
| 047x–055x | A20B-3300-0470–0552 |
| 060x–063x | A20B-3300-0600–0638 |
The A20B-3300-0293 (confirmed in this session as a "486 CPU MODULE W/16 MEG DRAM") positions the series as FANUC's CNC processor card and CPU module family — covering a wide span of processing hardware from early CPU cards through to more recent processor modules.
The A20B-3300-0050 at the 005x position occupies the lowest confirmed range within this extensive series — consistent with an early-generation CPU or processor card within the A20B-3300 family.
Key Product Information
| Parameter | Value |
|---|---|
| Part Number | A20B-3300-0050 |
| Series | A20B-3300 |
| Range | 005x |
| Type | PCB |
| Application | FANUC CNC / automation |
Application Scenarios
CNC processor or CPU board fault: A FANUC CNC system develops CPU-level or processing faults traceable to the A20B-3300-0050. The board is identified from its part number label. Replacement restores the specific processing function.
Legacy CNC spare parts management: A production facility maintaining older-generation FANUC CNC equipment stocks A20B-3300-0050 as a spare for the specific CNC in which it is installed.
FAQ
Q1: How do I confirm A20B-3300-0050 is the correct board for my FANUC CNC?
Read the part number from the installed board's label. If it reads A20B-3300-0050, this is the confirmed replacement. Cross-reference with the applicable FANUC CNC maintenance manual's board placement diagram and spare parts list to confirm the board's slot position and function.
Q2: What CNC platforms typically use A20B-3300 series processor boards?
The A20B-3300 series is confirmed as a CPU/processor card family spanning multiple FANUC CNC generations — with boards confirmed for i-series CNC systems (Series 16i, 18i, 21i) and related platforms. The 005x range at the beginning of the A20B-3300 numbering is consistent with an early-generation member of this CPU card family. Confirm the specific platform from the host system documentation.
Q3: Does replacing A20B-3300-0050 require CNC parameter backup and restore?
For CPU-type boards in the A20B-3300 series, replacing the board requires that all CNC data — programmes, parameters, PMC data, and tool data — be restored from a verified backup after installation. Maintain a current complete backup before proceeding with any CPU board replacement. For memory modules or interface boards within the series, data reload requirements depend on the specific board function.
Q4: What ESD precautions apply when handling A20B-3300-0050?
Handle with a grounded anti-static wrist strap on an ESD-safe surface. Store in anti-static packaging. Power down the CNC system completely before accessing internal control boards. Follow all applicable FANUC maintenance manual safety procedures for the specific CNC model.
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