Reference Guide for A06B, A16B, A05B, and Industrial Robot Components
Fanuc part numbers (typically starting with A06B, A16B, or A05B) are the standard identifiers for the world's most popular yellow robots. However, with decades of revisions across R-J2, R-J3, R-30iA, and R-30iB controllers, finding the exact match can be challenging.
This Fanuc Part Number Index is designed to help maintenance engineers and procurement teams quickly decode Fanuc's naming conventions and locate the correct robot spares without the need for thick technical manuals.
1. Understanding Fanuc Part Number Prefixes
Fanuc uses a structured coding system based on the component type. Identifying the first four characters of your Fanuc part number will immediately tell you the category of the component:
- A06B-xxxx-xxxx: Servo Drives, Motors, and Power Modules (Alpha/Beta Series).
- A05B-xxxx-xxxx: Complete Assemblies (Teach Pendants, Controller Cabinets, Mechanical Units).
- A16B / A20B-xxxx-xxxx: Printed Circuit Boards (PCBs) and Backplanes.
- A61L / A66L-xxxx-xxxx: Displays (LCD Monitors) and Communication Cables.
- A290-xxxx-xxxx: Mechanical parts for the robot arm (Gears, Castings).
2. Quick Search by Fanuc Controller System
Not sure of the part number? Start with your Fanuc controller generation to narrow down the compatible spares:
R-30iB / R-30iB Plus
Focus on:
- A05B-2255 iPendant assemblies
- A06B-6200 and A06B-6117 amplifier series
R-30iA
Focus on:
- A05B-2518 pendant families
- A06B-6114 servo amplifier modules
R-J3iB
Focus on:
- A05B-2301 operator panels
- A16B-3200 CPU boards
Controller generation is the fastest way to eliminate incompatible spare parts.
3. Top-Level Fanuc Part Categories
Teach Pendants & Cables (A05B Series)
The most frequently replaced items due to industrial wear and tear.
- Core Numbers: A05B-2255-C101, A05B-2301-C300, A660-2005-T506.
- Includes: iPendants, Legacy monochrome pendants, and high-flex connection cables.
👉 [View: Fanuc Teach Pendant & Cable Index]
Servo Amplifiers & Power Modules (A06B Series)
The "muscle" of the Fanuc system, including Alpha and Beta series modules.
- Core Numbers: A06B-6114-Hxxx, A06B-6117-Hxxx, A06B-6079-Hxxx.
- Includes: SVM (Servo Amp), PSM (Power Supply), and SPM (Spindle Amp).
👉 [View: Fanuc Drive & Amplifier Index]
Controller PCBs & Mainboards (A16B / A20B Series)
The central processing units and interface cards for the robot rack.
- Core Numbers: A16B-3200-0600, A20B-2101-0390.
- Includes: Main CPUs, Axis cards, Emergency stop boards, and I/O modules.
👉 [View: Fanuc Controller Boards & Modules Index]
4. Deciphering Fanuc Suffixes (Version Logic)
In the Fanuc world, the last few digits of a part number (e.g., #H510 or #nnnn) are critical:
- Hardware Revisions: A change from -0410to -0412 often indicates a minor hardware update that is usually backward compatible.
- Firmware/Software Tags: Suffixes starting with # often denote specific software loading or communication protocols.
Always verify the full string to ensure the part will communicate correctly with your existing controller software.
5. Discontinued Fanuc Parts & Modern Replacements
Some legacy Fanuc components are no longer manufactured, especially for R-J2 and early R-J3 systems.
However, maintenance options include:
- Fully tested refurbished boards
- Certified compatible replacements
- Cross-generation amplifier equivalents
In many factories, refurbished Fanuc hardware is standard practice for long-life robot systems.
6. How to Identify a Fanuc Part Effectively
- Locate the Sticker: Fanuc stickers are usually silver with black text.
- Focus on the "A" Number: Ignore the serial number; look for the 12-character string starting with A.
- Check Category Pages: Navigate to the specific index (Drives, Pendants, or Boards) to find compatibility notes.
Need Help Identifying a Fanuc Part? If you have an unreadable label or an unknown alarm code (e.g., SRVO-062), contact our technical team. We specialize in identifying Fanuc hardware by cabinet serial number.
FAQ C Fanuc Part Numbers & Replacement
Q: How do I know if two Fanuc amplifiers are interchangeable?
A: Check:
- Exact A06B base number
- Amplifier current rating
- Controller generation
- Software option configuration
Even small differences can prevent axis initialization.
Q: What does a Fanuc alarm like SRVO-062 indicate?
A: SRVO alarms typically relate to servo communication or amplifier faults.
They do not always mean the amplifier is defective check fiber cables, power supply voltage, and encoder signals first.
Q: Can I replace a failed board with a refurbished one?
A: Yes. Refurbished Fanuc boards are widely used in production environments when:
- They are fully load-tested
- Firmware compatibility is verified
- Warranty support is provided
Q: Why do some Fanuc motors share the same A06B prefix but differ in suffix?
A: Because the suffix defines:
- Shaft design
- Encoder type
- Brake configuration
- Mounting geometry
Always match the full part number when replacing motors.
Q: Can I identify a Fanuc part using the robot serial number?
A: Yes.
Fanuc system configuration files and controller backups can be used to extract installed hardware lists, which is often the safest way to confirm spare parts.
Related Fanuc Index Pages
- Fanuc R-30iB / R-30iB Plus Controller Spare Parts index
- Fanuc Part Number Index
- Fanuc Teach Pendant & Cable Index
- Fanuc Controller Boards & Modules Index
- Fanuc Main Board Compatibility Guide
- Fanuc Servo Drive Index
Compare Spare Parts for Other Robot Brands
- ABB Part Number Index
- Fanuc Part Number Index
- Kuka Part Number Index
- Yaskawa Part Number Index
- Mitsubishi Part Number Index
Compare Other Robot Controller Spare Parts
Reference Notes
This section provides supplementary reference links related to Fanuc hardware coding logic, system-level component classification, and controller-generation identification.
Referenced materials are intended to support index navigation and part number orientation only. They are informational in nature and do not replace official Fanuc technical documentation, system manuals, or software release notes.