FANUC A06B-6080-H301 Servo Module — Product Description

When the Term Is "Module," the Details Matter

People searching for FANUC servo components sometimes use the terms "amplifier," "driver," and "module" interchangeably. With the A06B-6080-H301, the word "module" carries specific meaning. The 6080 series is designed around a modular servo drive architecture — a system approach where individual drive modules slot into a shared power supply infrastructure, rather than each unit housing its own independent power stage.

This distinction matters at the replacement stage. The A06B-6080-H301 is not a standalone drive with its own rectifier and DC bus. It operates in conjunction with a FANUC power supply unit (PSM) within the same servo cabinet. If you're ordering a replacement, the module itself is what you need — the power supply and other cabinet components stay in place.

At a Glance

The 6080 Series: Modular by Design

FANUC's 6080 series represents an important architectural shift in how servo drive systems were packaged for CNC machine tools. Rather than assigning a self-contained amplifier to each axis grouping, the 6080 approach uses a centralized power supply module paired with separate servo drive modules — each responsible for its own axis control logic but drawing power from the shared PSM.

This modular topology offered real advantages in large multi-axis systems: easier scalability, simplified fault diagnosis (a module failure doesn't take down the power infrastructure), and a more organized cabinet layout. It became foundational to how FANUC structured servo systems in the late 1990s and early 2000s, and many of those installations remain in active service today.

The H301 within the 6080 family handles three servo axes from a single module housing. Three axes of coordinated CNC motion — typically X, Y, and Z on a machining center — managed through one replaceable unit. When that unit needs replacing, the H301 is the exact part required.

Understanding the Modular Cabinet Context

Before ordering, it helps to understand where the A06B-6080-H301 fits within the larger drive system:

The 6080 module plugs into a servo cabinet that also contains a FANUC PSM (Power Supply Module) and potentially other axis modules. The PSM handles AC-to-DC conversion and regenerative braking functions for the entire cabinet. The H301 module receives DC bus power from the PSM and independently manages the current control, position feedback processing, and motor commutation for its three assigned axes.

When diagnosing a servo fault in this type of system, the first step is always to determine whether the fault originates in the PSM or in a specific axis module. A PSM fault usually affects all axes simultaneously. A module fault tends to be axis-specific or limited to the axes that share that module. If your machine shows servo alarms on only three axes and those axes correspond to an H301, the module itself becomes the focal point of investigation.

New and Used Stock — What's Currently Available

Both conditions are stocked, subject to real-time availability. Because the 6080 series was widely deployed across mid-to-large CNC machining centers from major Japanese and European OEMs, used units sourced from decommissioned or upgraded systems are relatively accessible — and many remain in sound functional condition.

New units carry a full 12-month warranty and are the right choice when the machine in question is critical, runs demanding production cycles, or where you need maximum confidence in the replacement. Used units come with a 3-month warranty and represent a practical option for backup stock, lower-utilization machines, or budget-sensitive maintenance situations.

Stock levels for legacy FANUC modules can shift quickly. Confirm availability before finalizing your order.

Payment Methods & Shipping

Accepted payment: Bank Transfer (T/T) for any order value, no surcharge. PayPal for orders up to USD $500, handling fee approximately 3.9–4.4%. Western Union for any order value.

Dispatch: Within 2–4 business days of confirmed payment, via DHL or FedEx to most international destinations. Buyers in regions with limited courier access should contact us before ordering. All customs duties, import taxes, and clearance costs are the responsibility of the buyer. Multiple units can be combined into one shipment for consolidated freight costs.

Warranty Coverage — Clear and Straightforward

New units: 12-month warranty from delivery date. Used units: 3-month warranty from delivery date.

Warranty applies to functional failure under normal installation and operating conditions. It does not cover physical damage incurred after delivery, faults caused by incorrect wiring or parameter configuration, or damage from operating conditions outside the module's rated specifications.

Returns are accepted for goods arriving damaged or not as described — report on the same day or the next business day after receipt. Non-functional units reported within 4 days of delivery also qualify for return or replacement. Change-of-mind returns and wrong-item purchases are excluded. All returned units must carry the original warranty label, intact and unmodified.

Typical Machine Applications

The A06B-6080-H301 is most commonly associated with:

• Mid-to-large CNC machining centers running FANUC Series 16i, 18i, or 21i controllers with modular servo drive cabinets
• 5-axis machining centers where multiple 6080-series modules cover different axis groupings
• FANUC-equipped turning centers and mill-turn machines with complex multi-axis servo configurations
• Industrial robots and flexible manufacturing systems where the 6080 modular architecture was adopted by system integrators
• Heavy-duty production equipment in automotive, aerospace, and precision engineering facilities

Frequently Asked Questions

Q1: What is the difference between a FANUC "servo module" like the A06B-6080-H301 and a "servo amplifier" from the 6090 or 6093 series?

The key difference lies in the power architecture. Servo amplifiers in the 6090 and 6093 series are largely self-contained units with their own power supply stages — they receive AC input and handle the full conversion and motor drive function internally. The A06B-6080-H301, as part of the 6080 modular series, is a drive module that relies on a separate FANUC Power Supply Module (PSM) for its DC bus power. The H301 handles the servo control and output stages for three axes, but it does not contain its own rectifier. This means you only need to replace the H301 module itself when the module fails — the PSM and other cabinet components remain in place.

Q2: My machine has multiple servo modules in the cabinet — how do I know which one is the A06B-6080-H301?

In a FANUC modular servo cabinet, each module is labeled directly on its front panel or top face with its full part number. Locate the module whose label reads A06B-6080-H301 and note which axis assignments it covers — this is typically documented in the machine's electrical cabinet schematic. If the label is damaged or unreadable, the machine's maintenance manual or FANUC drive cabinet wiring diagram will identify which module handles which axes by slot position.

Q3: Can one failed H301 module cause alarms on all axes in the machine, or only on the axes it controls?

A failed A06B-6080-H301 will typically generate alarms specific to the three axes that module controls. The other axes — served by different modules in the same cabinet — should remain unaffected, assuming the power supply module (PSM) is functioning normally. If all axes alarm out simultaneously, the PSM or the DC bus power distribution is the more likely source of the problem. Axis-specific alarms that map neatly to a three-axis group are a much clearer indicator that the corresponding H301 module needs attention.

Q4: Do I need to reprogram anything after replacing the A06B-6080-H301 with a new or used unit?

For a direct like-for-like module swap, servo parameters are stored in the CNC controller — not in the drive module itself in most 6080-series configurations. This means that replacing the H301 module with an identical part number should not require re-entering servo parameters, as long as the controller's parameter memory has not been lost. However, it is always good practice to back up the full CNC parameter set before performing any drive replacement. If the machine runs through an auto-tuning procedure on startup, allow that to complete and verify axis performance before returning to production.

Q5: Is there any risk in ordering a used A06B-6080-H301 for a critical production machine?

The risk is manageable but real. Used modules have service history that isn't fully known — thermal stress, voltage transients, and operating hours all affect component longevity over time. For machines where downtime has significant production cost, a new unit with a 12-month warranty is the more defensible choice. Used units are well-suited to machines with lower criticality, backup inventory requirements, or situations where budget constraints are a genuine factor. In either case, if a used unit is installed and develops an issue within 4 days of delivery under normal operating conditions, a return or replacement is available under our warranty policy.

Contact: Ms. Amy | Email: sales01@sande-elec.com | Tel: +86 18620505228