Description
FANUC A20B-3300-0102 is a CPU/control board (RISC PCB CPU module) used in industrial CNC controller systems made by FANUC. It’s part of the A20B-3300 product series of printed circuit boards used inside CNC control cabinets.
🧠 What It Is
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Part Number: A20B-3300-0102
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Category: CPU/Control Board – central processing PCB.
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Description: Standard RISC PCB CPU module used as the processing core in compatible FANUC controller systems. It handles critical computing tasks related to machine control logic, program execution, and communication with other controller modules.
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Technology: Based on a RISC (Reduced Instruction Set Computer) architecture — which FANUC uses for reliable industrial performance.
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Replaces: A20B-3300-0101 (an earlier or related variant).
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Weight: ~1 lb.
🛠️ Typical Use
This board is installed inside the CNC controller rack and works with:
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the controller’s motherboard,
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I/O modules,
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display/interface boards, and
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other CPU and communication cards
to operate the CNC system. Without a functional CPU board like this, the controller will generally fail to initialize or execute machine programs.
📌 Notes
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It’s typically used in FANUC A20B-3300 series systems — an older generation of control boards found in many machine tools and industrial automation systems.
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Available new, refurbished, or repaired through aftermarket suppliers; original manufacturer warranty may vary.
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Often sold as a replacement part for maintaining or repairing CNC controls.