The FANUC A16B-2203-0661 is an internal power/wiring PCB for compatible single-axis FANUC αiSV80 servo amplifier modules. FANUC documentation assigns it to the 200V-class A06B-6114-H105 and A06B-6117-H105 amplifier configurations.

This is a replacement circuit board rather than a complete servo drive. Confirm the full A16B number, suffix revision and A06B amplifier nameplate because αiSV80 and αiSV80L use different power boards despite their similar model names.

A16B-2203-0661 Product Information

αiSV80 Power-Stage Function

Within the complete amplifier, the A16B-2203-0661 supports the high-current power and motor-output section. It works with the separate control PCB, DC-link supply, cooling assembly and FSSB servo-control system to operate one servo axis. The associated αiSV80 amplifier provides 19 Arms rated output with a nominal 80 Apeak current limit.

Compatibility and Model Differences

Match the PCB revision, amplifier order number, unit specification, connectors, heat sink and power-device layout. The level-up αiSV80L model A06B-6117-H155 uses A16B-2203-0667, not A16B-2203-0661. A16B-2203-0660 is associated with αiSV40, while A16B-2203-0662 is associated with αiSV160.

Testing and Installation

REACO CNC checks the label, PCB condition, terminals, capacitors, power semiconductors, insulation, DC-link section and amplifier operation on a compatible test platform where available. Isolate power and allow the DC link to discharge completely before service. Installation should be completed by qualified CNC personnel.

Related resources: FANUC servo PCBs, FANUC CNC controls and FANUC servo repair services.