The A06B-6079-H208 is the highest-current 2-axis amplifier in the Fanuc Alpha A06B-6079 family, rated SVM2-80/80 — 80 A per axis. It drives the large servo motors on heavy machining centers, boring mills, and big lathes. When one fails, the machine it sits in is usually a high-value asset, so getting the right replacement or repair fast matters. This guide covers the specs, the failures we see most, and your realistic options today.
What Is the A06B-6079-H208?
The A06B-6079-H208 is a Fanuc Alpha series 2-axis servo amplifier module. The SVM2-80/80 rating means it controls two axes at 80 A each — double the current of its smaller sibling, the A06B-6079-H206 (SVM2-40/40). Like all amplifiers in the 6079 family, it is a 200 V class unit powered from a Fanuc PSM power supply module through the DC link.
You will typically find the H208 paired with larger Alpha series servo motors in the 80 A class — the motors that move heavy tables, large spindles’ axis loads, and big turrets. These machines were built to run for decades, and many still do, which is why demand for this legacy amplifier never went away.
Not sure how the H208 fits into the wider Fanuc naming system? Our A06B series model number guide explains the full family.
A06B-6079-H208 Specifications
| Item | Specification |
|---|---|
| Model | A06B-6079-H208 |
| Amplifier type | Fanuc Alpha SVM2-80/80 (2-axis servo amplifier module) |
| Rated output current | 80 A (L axis) / 80 A (M axis) |
| Voltage class | 200 V class, powered from a Fanuc PSM power supply module (DC link) |
| Compatible motors | Larger Fanuc Alpha series servo motors in the 80 A class |
| Series family | A06B-6079 (single-, 2-axis, and 3-axis variants) |
| Closest sibling | A06B-6079-H206 (SVM2-40/40, same platform, lower current) |
| Status | Legacy series — no longer in active production |
Common A06B-6079-H208 Failures We See in Our Repair Lab
High-current amplifiers fail differently from small ones. At 80 A per axis, everything runs hotter and every weakness shows up faster. Here is what we actually see on the bench:
- IPM failure under load. The power modules on an 80 A unit work hard. A degraded motor or cable that a smaller amp might tolerate will kill an H208’s IPM quickly. Always megger the motor and check cable insulation before installing a repaired or replacement unit.
- Bus bar and terminal heat damage. Years of high current through screw terminals causes loosening and heat discoloration. We see burnt DC link terminals on units from hot cabinets. This is repairable, but only if caught before the board underneath is damaged.
- Cooling fan and heatsink issues. An 80 A amplifier with a failed fan does not last long. Overheat alarms on this model should never be reset and ignored — check airflow first.
- Aging capacitors on the drive board. Same story as every 20-year-old Fanuc unit: dried-out electrolytics causing intermittent faults, especially units that fault only after the machine warms up.
- Inrush and control power damage from a failing PSM. If the power supply module in the cabinet is sick, it takes amplifiers down with it. When an H208 arrives with blown control circuits, we always ask about the PSM too.
Have an H208 with an alarm on the display? Send us the alarm code and a photo of the unit’s LED status — we will tell you what it usually means and whether repair makes sense. Free assessment: [email protected]
A06B-6079-H208 vs H206: Can You Swap Them?
This is the question we get most often, because the A06B-6079-H206 is more common on the surplus market. The short answer:
- H208 in place of an H206 — often physically and electrically possible, since they share the same platform. Motor current ratings and servo parameters must be verified first.
- H206 in place of an H208 — not recommended. A 40 A amplifier cannot safely drive motors sized for 80 A. You will get overcurrent alarms at best and a dead IPM at worst.
For the full compatibility breakdown — mounting, connectors, parameters, and motor matching — read our dedicated comparison: A06B-6079-H206 vs H208: Differences and Compatibility Guide.
Repair or Replace: What Makes Sense for an H208?
| Option | Typical cost | Lead time | Best when |
|---|---|---|---|
| Repair your failed unit | Lowest — save up to 75% | 3–5 days standard | Failure is electronic (IPM, capacitors, fan, terminals) |
| Tested replacement from stock | Moderate | Ships in 48 hours | Downtime costs more than the part, or the unit is physically damaged |
| Untested surplus | Varies | Varies | Only if you can bench-test it yourself before installation |
One H208-specific note: because this amplifier feeds large motors, the motor and cables are more often the root cause than on smaller units. In our repair lab, roughly a third of “dead amplifier” cases trace back to a motor or cable problem. Fix the cause, not just the symptom.
A06B-6079-H208 In Stock at OUKE
We stock the A06B-6079-H208 2-axis servo amplifier, bench-tested under load before shipping. Orders leave our Dongguan warehouse within 48 hours via DHL, FedEx, or UPS, and every unit carries a minimum 1-year warranty. No minimum order quantity — a single unit is fine.
If you would rather repair your own unit, our standard turnaround is 3–5 working days with a 99.5% first-pass repair success rate.
FAQ
What does SVM2-80/80 mean on the A06B-6079-H208?
SVM stands for Servo amplifier Module, “2” indicates two axes, and “80/80” is the rated output current per axis — 80 A for the L axis and 80 A for the M axis. It is the highest-current 2-axis model in the A06B-6079 family.
Is the A06B-6079-H208 discontinued?
Yes, the Fanuc Alpha 6079 series is a legacy line no longer in active production. Tested used, refurbished, and repaired units remain available from specialist suppliers like OUKE.
Can I replace a failed H208 with an H206?
No. The H206 is rated 40 A per axis and cannot safely drive motors sized for 80 A. The reverse — an H208 replacing an H206 — is often possible after verifying motor ratings and parameters.
My H208 faults only when the machine warms up. What is wrong?
Heat-dependent faults on this model usually point to aging electrolytic capacitors or a marginal cooling fan. Both are repairable, but continued running risks IPM damage, which costs significantly more.
Should I test the motor before installing a replacement H208?
Yes — always. A degraded motor or damaged cable is the most common reason a replacement amplifier fails again within weeks. Megger the motor windings and inspect the power cable before powering up.
Get Your A06B-6079-H208 Back Running Fast
Need a tested A06B-6079-H208 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.