The A06B-6079-H206 is a 2-axis Fanuc Alpha servo amplifier (SVM2-40/40) found in thousands of CNC machines still running today. If your machine is down with a servo alarm on this unit, you have three options: repair it, buy a tested replacement, or swap in a compatible model. This guide covers the specs, the failures we see most in our repair lab, and how to choose the fastest way back to production.
What Is the A06B-6079-H206?
The A06B-6079-H206 belongs to the Fanuc Alpha servo amplifier family. The “SVM2-40/40” designation means it drives two servo axes, each rated at 40 A. It is a 200 V class unit and works together with a Fanuc PSM power supply module — it does not take mains power directly.
You will find this amplifier in machining centers, lathes, and milling machines built around Fanuc Alpha series servo motors. It was widely installed through the late 1990s and 2000s, which means many units in the field are now 15–25 years old. That age profile is exactly why failures are common — and why repair and replacement demand stays strong.
For a full breakdown of how Fanuc model numbers work across the A06B family, see our A06B series servo amplifier guide.
A06B-6079-H206 Specifications
| Item | Specification |
|---|---|
| Model | A06B-6079-H206 |
| Amplifier type | Fanuc Alpha SVM2-40/40 (2-axis servo amplifier module) |
| Rated output current | 40 A (L axis) / 40 A (M axis) |
| Voltage class | 200 V class, powered from a Fanuc PSM power supply module (DC link) |
| Compatible motors | Fanuc Alpha series servo motors in the 40 A class |
| Series family | A06B-6079 (single-, 2-axis, and 3-axis variants) |
| Status | Legacy series — no longer in active production |
Common A06B-6079-H206 Failures We See in Our Repair Lab
We test and repair these units every week. The failure patterns are consistent, and most of them come down to age:
- IPM / power transistor failure. The most common killer. Usually shows up as an overcurrent alarm on one axis. Often caused by a shorted motor cable or a failing motor — always check the motor and cable before powering a repaired unit, or the new IPM dies again.
- Aging electrolytic capacitors. After 15+ years, capacitors on the control and drive boards dry out. Symptoms: intermittent alarms, failure to ready-up, or a unit that works cold but faults when warm.
- Cooling fan failure. A stuck or noisy fan leads to overheat alarms. Cheap to fix, but often ignored until the heat damages something more expensive.
- Blown control power circuits. Usually caused by voltage spikes from a failing PSM module or unstable shop power.
- Connector and bus bar corrosion. Common in humid environments. Causes intermittent faults that are painful to diagnose without a test bench.
Seeing a servo alarm on your A06B-6079-H206? Send us the alarm code and the LED status on the unit — our engineers will tell you whether it looks repairable before you spend anything. [email protected]
Compatible and Alternative Models
The A06B-6079 family shares the same mechanical and electrical platform, which gives you options when the exact H206 is not available:
- A06B-6079-H208 — the higher-current 2-axis variant (80 A class). It can physically replace an H206 in many cabinets, but you must confirm motor current ratings and parameters first. We wrote a detailed comparison here: A06B-6079-H206 vs H208: Differences and Compatibility Guide.
- A06B-6079-H201 / H205 and other 2-axis variants — lower-current siblings. Not direct upgrades for a 40 A application, but useful when you are standardizing spares across machines.
- Single-axis A06B-6079-H1xx units — only an option if you are willing to reconfigure the cabinet with separate amplifiers per axis.
One rule above all: match the amplifier to the motor current, not the other way around. If you are unsure, send us your motor model and we will confirm compatibility before you order.
New vs. Used vs. Repair: Which Option Makes Sense?
The A06B-6079-H206 is a legacy unit, so “brand new from the factory” is rarely realistic. Here is how the real options compare:
| Option | Typical cost | Lead time | Risk |
|---|---|---|---|
| Repair your failed unit | Lowest — save up to 75% vs. replacement | 3–5 days standard | Low, if the root cause (motor/cable) is also checked |
| Tested used / refurbished unit | Moderate | 48 hours from stock | Low when the unit is bench-tested under load |
| Untested surplus unit | Varies | Varies | High — no warranty, unknown history |
In our experience, repair is the right call when the failure is electronic (IPM, capacitors, fan). A tested replacement makes more sense when the unit is physically damaged or you cannot afford 3–5 days of downtime.
A06B-6079-H206 In Stock at OUKE
We keep the A06B-6079-H206 2-axis servo amplifier in stock, along with its siblings like the A06B-6079-H208. Every unit is bench-tested before it leaves our warehouse in Dongguan, China, and we ship worldwide within 48 hours via DHL, FedEx, or UPS.
Every repaired and refurbished unit comes with a minimum 1-year warranty. Our repair first-pass success rate is 99.5%, and there is no minimum order quantity — one unit is fine.
FAQ
Is the A06B-6079-H206 discontinued?
It is a legacy Fanuc Alpha series unit and no longer in active production. However, tested used, refurbished, and repaired units remain widely available from specialist suppliers like OUKE.
What does SVM2-40/40 mean?
SVM stands for Servo amplifier Module, “2” means two axes, and “40/40” is the rated output current of each axis in amps — 40 A for the L axis and 40 A for the M axis.
Can an A06B-6079-H208 replace an H206?
Physically and electrically it is possible in many installations, since the H208 is the higher-current sibling on the same platform. You must verify motor current ratings and servo parameters before swapping. See our H206 vs H208 compatibility guide for details.
My H206 shows an overcurrent alarm. Is the amplifier dead?
Not necessarily. Overcurrent alarms are also caused by shorted motor cables and failing servo motors. Check the motor and cable insulation first — replacing or repairing the amplifier without fixing the root cause usually kills the next unit too.
How long does repair take?
Our standard repair turnaround is 3–5 working days, with a minimum 1-year warranty on the repair. If downtime is critical, a tested unit from stock ships within 48 hours instead.
Get Your A06B-6079-H206 Back Running Fast
Need a replacement A06B-6079-H206 or a repair quote for your failed unit? We have 100,000+ SKUs in stock, all tested, shipped within 48 hours — no MOQ. Send us your part number: [email protected] or WhatsApp +86 15107352558.