A20B-3900-0280 FANUC Memory Card 128MB / SRAM 1MB Module

The A20B-3900-0280 is a FANUC memory card, commonly described as a memory card suitable for 128MB / SRAM 1MB module. It is used in FANUC CNC control systems to support memory storage, system data handling, and CNC machine operation.

This model belongs to the FANUC CNC memory and control system component category. Since this model has been discontinued by the manufacturer, correct model confirmation, memory capacity checking, system compatibility verification, and professional testing are especially important before replacement.

Worldwide Shipping & REACO CNC Service

• Worldwide Shipping: We can ship worldwide by DHL, UPS, FedEx, or other available logistics channels.
• Fast Handling: In-stock items can usually be shipped within 1-2 working days after payment.
• 100% Tested Before Delivery: Each qualified product is tested before shipment. A test video can be sent before delivery when required.
• REACO Warranty: New or refurbished products usually include a 1-year warranty, and used 90% new products usually include a 3-month warranty.
• Free Technical Support: Our team can help with basic model confirmation, replacement guidance, and after-sales support.

Product Information

Product Application

The FANUC A20B-3900-0280 memory card is mainly used in FANUC CNC control systems. As a memory card suitable for 128MB / SRAM 1MB module applications, it is suitable for CNC memory replacement, machine data storage support, CNC control maintenance, and FANUC system servicing.

If your original memory card is faulty, damaged, unable to store data correctly, or causing memory-related CNC system issues, this model may be considered as a replacement after confirming the full model number, CNC system model, memory capacity, machine data requirements, and system compatibility.

Quality Control and Testing

For discontinued FANUC memory cards, testing is very important before shipment because memory condition may affect CNC system data storage, startup stability, machine parameters, and production reliability. REACO CNC checks qualified products carefully and can provide real product photos or a test video before delivery when required.

Our goal is to help customers receive reliable CNC spare parts with clear product information, careful inspection, responsive after-sales support, and practical technical assistance.

Compatibility Confirmation

Before ordering, please confirm that the full model number on your original memory card is A20B-3900-0280. Similar FANUC memory cards may have different capacity, SRAM configuration, system compatibility, or data storage requirements.

If you are not sure whether this FANUC memory card is suitable for your machine, please send us photos of the old memory card label, CNC system model, system screen, machine model, and alarm information. REACO CNC can help check the details before purchase.