A06B-6290-H204 Fanuc Servo Amplifier aiSV10/20HV-B

Buy online your A06B-6290-H204 Fanuc Servo Amplifier aiSV10/20HV-B from our US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

The FANUC A06B-6290-H204 is a high-voltage alpha i SV servo amplifier from the FANUC 6124/6127 i HV drive family, designed to control feed axes on FANUC CNC machine tools. Operating on the shared HV DC bus and communicating with the CNC through the FSSB optical interface, it provides a reliable solution for maintenance, repair, and replacement applications.

This aiSV10/20HV-B version controls two axes with different power capacities within a single module, delivering precise torque regulation, smooth speed control, and stable positioning for FANUC alpha i HV servo motors. It is particularly well suited to compact machining centers and production equipment where cabinet space is limited.

The amplifier is commonly used with FANUC Series 0i, 30i, 31i, and 32i controls, and is typically paired with motors such as the aiS 10HV and aiS 20HV. Front-panel status LEDs and alarm codes simplify troubleshooting and help technicians identify faults quickly during commissioning or maintenance procedures.

The B-revision hardware incorporates protection features against overcurrent and overheating to ensure dependable operation in industrial environments exposed to chips, coolant mist, and electrical noise. When replaced with an identical unit and configured according to the machine specifications, it restores original axis performance without requiring modifications to the cabinet or existing wiring.

The amplifier operates with an input voltage range of 537 to 679 V DC, an input current of 12.5 A, and provides an output voltage of 400 V AC. The output current ratings for the L and M axes are 3.2 A and 6.5 A respectively.

Widely used as a spare part, the FANUC A06B-6290-H204 is often selected to resolve axis faults, overcurrent alarms, and intermittent drive trips originating from the servo amplifier. Keeping an identical unit in stock helps minimize downtime and enables faster diagnostics during unexpected machine stoppages.

Each amplifier supplied by Cnc-shopping can be tested by qualified engineers to verify FSSB communication, current-loop performance, and alarm functionality. Units are packaged using protective materials suitable for industrial transportation and are supplied with warranty coverage in accordance with the applicable service terms. Repair services, exchange programs, and obsolete-part sourcing options may also be available to support the long-term operation of legacy FANUC installations.

Frequently asked questions about A06B-6290-H204:

Which motors can this amplifier run?
It is intended for FANUC alpha i servo HV models, commonly aiS 10HV and aiS 20HV in a mixed two-axis setup. Always confirm the motor nameplate and the machine BOM to match ratings.

Is it compatible with 0i and 30i/31i/32i controls?
Yes, it is used with these FANUC controls via the FSSB optical link when installed in the alpha i HV drive cabinet. Check your control’s FSSB topology and the cabinet layout for a direct fit.

Can it replace a different H2xx code in the same cabinet?
Use like-for-like replacements for the safest result. Cross-use with other H2xx variants depends on motor ratings, firmware and the drive mix, so verify against the machine documentation before substitution.

What should be considered during replacement?
Back up axis parameters and confirm the motor data set used by the CNC. After installation, verify FSSB communication, axis enable and alarms on the drive’s indicator before returning the machine to production.