FANUC A06B-6127-H106 Alpha i Servo Amplifier Module — AiSV-180HV Single-Axis, 58A Rated, for High-Torque 400V CNC Axes

Not all axes on a large machining center are equal. The spindle carries most of the cutting load, but the linear axes — X, Y, Z on a heavy gantry or boring mill, or the primary traverse on a large turning center — demand servo drives that can sustain high continuous current while handling sharp acceleration spikes without faulting. That's exactly the operational context the A06B-6127-H106 was designed for.

Designated AiSV-180HV in FANUC's Alpha i high-voltage servo platform, this is the highest-current single-axis module in the 6127 HV family. Its 58A rated output and 180A peak capacity put it in a different class from the smaller dual-axis H202 and H203 modules — it drives one axis, but drives it hard, on machines that need it.

We stock the A06B-6127-H106 in new and used (inspected) condition, ready for worldwide dispatch within 0–3 working days.

Where This Drive Fits: Large-Axis, High-Torque Applications

The 6127 series occupies a specific place in FANUC's servo architecture: 400V three-phase input, FSSB fiber optic control interface, designed for use with 30i, 31i, 32i, and 35i Model A CNC systems. Within that family, the H106 is the single-axis module at the upper end of the current range.

Single-axis modules (H1xx) concentrate the full drive capacity on one motor channel. There's no sharing of power stages or control resources with a second axis. For a machine where one axis carries significant mechanical load — a large vertical machining center's Z-axis, the table drive on a heavy horizontal boring mill, or the primary feed axis of a high-inertia system — the single-axis configuration ensures the full rated capacity is available to that axis exclusively.

The 180A peak current rating is particularly relevant here. Peak current determines how quickly the drive can accelerate a high-inertia load and how forcefully it can resist disturbances during cutting. A 180A peak from a 58A rated drive means the amplifier can deliver roughly three times its continuous rating in short bursts — the kind of headroom that keeps a heavy axis responsive rather than sluggish under dynamic load changes.

Technical Specifications

The Meaning of "Discontinued" — and Why It Matters for Procurement

FANUC has officially discontinued the A06B-6127-H106. The 6127 HV series has been superseded by the second-generation 6290 HV series, which handles the same 400V application space with updated electronics and broader control compatibility.

In practice, this means new-old-stock (NOS) sourcing has become the primary route for replacement units rather than direct factory supply. It does not mean the drive has disappeared from the market — significant stocks remain available through specialist industrial distributors and MRO suppliers globally — but it does introduce a variable: availability fluctuates, and the pool of genuinely unused original units will only shrink over time.

For maintenance engineers managing large CNC assets that run this drive, the procurement calculus shifts. A used, tested unit may be the practical choice today. But if the machine in question is a long-term production asset with no upgrade path planned, securing a spare new unit now while stock exists is a decision worth making before availability becomes a limiting factor.

H106 vs Other 6127 HV Modules: Choosing the Right Current Rating

The 6127 series covers a wide range of single-axis and dual-axis configurations. Within the single-axis (H1xx) range, the key distinction is current capacity, which maps to the size of the servo motor being driven:

The H102 handles the lower end at 10A rated (AiSV-10HV), suited to smaller high-voltage motors on less demanding axes. Moving up through H103 (20A), H104 (40A), H105 (80A), the H106 at 58A sits in the upper-mid tier — but this is 58A continuous, with 180A peak available. The 180 in the drive's model designation (AiSV-180HV) refers to that peak figure, not the continuous rating.

This distinction matters when cross-checking compatibility with the motor on your machine. The key is always the motor's continuous rated current and peak current requirement. If your application originally specified an H106, you need an H106. Neither a lower-rated nor a higher-rated variant within the family can substitute without parameter changes and, more importantly, without verifying the new drive's continuous current matches what the motor and application require.

Condition Options

New (unused) units are sourced from original FANUC production stock. Given the discontinued status of this product, genuine new units are increasingly scarce. All new units carry a 12-month warranty from our facility.

Used (inspected) units have been functionally examined and carry a 3-month warranty. For facilities where downtime cost justifies a working spare over a premium on condition, a tested used unit is a practical and immediate solution. Both conditions ship in original packaging.

Ordering, Payment & Shipping

Worldwide dispatch via DHL and FedEx. Most orders leave our facility within 0 to 3 working days following payment confirmation. Combined shipping is available for multi-item orders.

Payment options:

• Bank Transfer (T/T) — accepted for all order values
• PayPal — for orders up to $500
• Western Union — accepted for all order values

Import duties and local taxes at destination are the buyer's responsibility. Contact us before ordering if you need a freight cost estimate for your specific country.

Warranty & Returns

Returns are accepted when a unit arrives damaged, incomplete, or not as described — or proves non-functional within 4 days of receipt. Items must be returned in original condition with the warranty label intact. Return freight is the buyer's responsibility.

Failures resulting from incorrect installation, improper parameter configuration, mismatched motor specifications, or physical damage post-delivery fall outside warranty coverage.

Frequently Asked Questions

Q1: What kind of machine typically uses the A06B-6127-H106?

This drive is most commonly found on large-format CNC machining centers, heavy horizontal boring mills, large turning cells, and high-axis-load manufacturing systems built around FANUC 30i or 31i CNC controllers. The 58A continuous / 180A peak current rating is suited to servo motors driving axes with significant mechanical inertia or high cutting resistance — situations where a smaller current-rated drive would either fault under peak load demands or run too close to its continuous limit to provide adequate thermal headroom. The 400V input also places it firmly in European-standard and high-specification industrial facilities rather than standard 200V workshop environments.

Q2: The drive is listed as discontinued — is it still being manufactured anywhere?

 No. FANUC has ended production of the A06B-6127-H106 and the broader 6127 series. What remains on the market is a combination of genuine new-old-stock (NOS) units held by distributors, used surplus units recovered from machine overhauls, and repaired/exchange units. None of these originate from current manufacturing. The successor platform for new installations is the A06B-6290 series, but that is only applicable to machines being retooled or upgraded — for a machine currently running a 6127-H106 in a 30i/31i environment, the direct replacement is still an H106.

Q3: Can the A06B-6127-H106 be used with a 480V power supply, or is it strictly a 400V unit?

 The specification for the main power input covers 400V AC to 480V AC three-phase with an allowable deviation of –15% to +10%. This means the drive is technically compatible with supplies across that range — 400V systems standard in Europe and parts of Asia, as well as 480V supplies commonly found in North American industrial facilities. The control circuit voltage is separately supplied at 200–240V single-phase, which also spans both 200V and 240V single-phase standards. Before connecting to any supply, confirm both the main and control voltages match the specifications and fall within the stated tolerance band.

Q4: My machine shows a servo alarm on the axis running this amplifier. How do I determine whether the H106 itself is faulty before ordering a replacement?

Systematic diagnosis matters here, particularly given the cost of this drive. Start by checking whether the CNC reports the alarm as a hardware fault on the specific axis (amplifier overcurrent, IPM fault, or communication loss on that FSSB axis) versus a motor or encoder error. If the alarm is an IPM or output transistor fault, the amplifier is the more likely cause. However, also inspect the motor power cables for insulation damage or short circuits — a motor winding fault can destroy a new amplifier if installed without first checking the load. Measure motor winding resistance and insulation resistance to ground (ideally >1MΩ at 500V DC) before fitting a replacement drive. If the CNC reports an FSSB communication error specifically for this axis, check the fiber optic cable connection between the CNC and the amplifier before concluding the drive is at fault.

Q5: Is it necessary to reload servo parameters when installing a replacement H106?

 In most cases, yes. When replacing an amplifier module in a 30i/31i system, the CNC must recognize the new drive on the FSSB bus and confirm axis assignment. If the machine uses an absolute position encoder, the absolute reference position will typically be lost and will need to be re-established after the drive is fitted and powered. Servo tuning parameters stored in the CNC (not in the drive itself) are generally preserved — they live in the CNC's non-volatile memory — but it is strongly recommended to back up the CNC parameter file before any hardware replacement. In some configurations, drive-specific initialization parameters may need to be confirmed or re-entered. Refer to the machine builder's maintenance documentation or FANUC manual B-65282 for the specific procedure applicable to your control generation.

Confirm availability or request a quote: Contact Ms. Amy — sales01@sande-elec.com | Skype: sandesales01 | Tel: +86 18620505228