Fanuc PLC Board A20B-2100-0130 Used In Good Condition A20B21000130 A2OB-21OO-O13O

FANUC A20B-2100-0130 | A20B-2100 Series Control PCB — Alpha Drive System Board, Discontinued

Part Number: A20B-2100-0130

Manufacturer: FANUC Corporation (Japan)

Product Type: Control PCB — Alpha Drive System Board

Board Series: A20B-2100

Application: FANUC Alpha series servo and spindle drive systems

Production Status: Discontinued by manufacturer

Origin: Japan

About the A20B-2100 Series

The A20B-2100 series is FANUC's family of printed circuit boards for Alpha-generation drive systems — the servo amplifier modules (SVM), spindle amplifier modules (SPM), and power supply modules (PSM) that form the drive cabinet on machines running FANUC 0i, 16i, 18i, 21i, and related CNC platforms. Each A20B-2100 board serves a specific functional role inside one of these amplifier units: power supply regulation, control logic, gate driving, or current sensing.

The A20B-2100-0130 occupies a core position within its target amplifier. The A20B-2100 numbering places it in the same generation as boards like A20B-2100-0250 (Alpha SVM1 FSSB control board) and A20B-2100-0390/0391 (Alpha PSM power circuit boards) — a well-documented generation of FANUC drive boards that has been in service on machine tools since the mid-1990s and continues to run in production facilities worldwide.

With the board now discontinued by FANUC, the aftermarket is the primary supply source. That is not unusual for boards in this series — many Alpha-generation drive boards reached end-of-life years ago while the machines they serve continue operating. The installed base remains large, which is why repair and exchange services for A20B-2100 boards are widely available.

Confirming the Correct Board

Exact part number matching is essential for any A20B-2100 board replacement. Within the series, adjacent numbers cover different amplifier types, different axis counts, or different power ratings. A board that fits physically may not match electrically. The A20B-2100-0130 label on the installed board is the definitive reference — confirm it before ordering.

If the installed board's label is illegible, cross-reference the drive unit's model number (A06B-xxxx-Hxxx) against FANUC's Alpha series spare parts documentation, which maps each drive model to its corresponding PCB part numbers.

Key Specifications

FAQ

Q1: What type of board is the A20B-2100-0130?

It is a control PCB from FANUC's A20B-2100 series — the board family used inside Alpha-generation servo amplifier, spindle amplifier, and power supply modules for FANUC CNC machine tools. The specific functional role (axis control, spindle control, or power supply regulation) is determined by which Alpha drive unit the board is installed in.

Q2: The board is discontinued. Is it still available?

Yes, through the FANUC aftermarket. Alpha-generation drive boards have been out of FANUC production for years, but exchange and repair services remain active because the installed machine base is large and these machines continue running in production. Specialist FANUC drive repair companies hold exchange stock and can repair failed units at component level.

Q3: Why is exact part number matching so important for this board?

Within the A20B-2100 series, adjacent part numbers cover different amplifier types and power ratings. A board that physically fits the same slot may use a different signal interface, different firmware, or different protection thresholds. The wrong board will either not function or behave incorrectly, potentially causing new faults. Always confirm A20B-2100-0130 specifically.

Q4: What should be checked after installing a replacement A20B-2100-0130?

After fitting the replacement, verify the drive's parameter settings against the machine's documentation. Alpha drive boards store application-specific settings — current limits, speed calibration, and motor parameters. If these were not recorded from the original board, the drive may need re-tuning before returning to production.

Q5: Can the A20B-2100-0130 be repaired at component level if a replacement is unavailable?

Often yes. Alpha drive boards are well understood by specialist FANUC repair companies. Common failure points — gate driver ICs, optocouplers, capacitors — are identifiable and replaceable at component level. Component repair is frequently more economical than sourcing an exchange board, particularly for a discontinued part. Request a functional test certification after repair.