The A06B-6096-H206 is a 2-axis Fanuc Alpha i series servo amplifier (SVM2-40/40i) with an FSSB fiber-optic interface. It belongs to the newer generation that followed the classic A06B-6079 Alpha series — and that difference matters when you are sourcing a replacement. This guide covers the specs, the failures we see most in our repair lab, and how to avoid the compatibility mistakes buyers make with this model.
What Is the A06B-6096-H206?
The A06B-6096-H206 is a 200 V class, 2-axis servo amplifier module rated at 40 A per axis. Unlike the older 6079 series, it communicates with the CNC over FSSB — Fanuc’s fiber-optic servo bus — and it is designed to drive Alpha i series servo motors with high-resolution serial encoders.
Like all Fanuc modular servo amplifiers, it does not take mains power directly. It is fed through the DC link of a Fanuc Alpha i power supply module. When one of these amplifiers fails, always consider the health of the power supply module in the same cabinet — the two age together.
If you want the wider picture of how Fanuc amplifier families and model numbers fit together, our A06B series model number guide is a good starting point. For the theory behind what these modules actually do, see our servo amplifier working principle breakdown.
A06B-6096-H206 Specifications
| Item | Specification |
|---|---|
| Model | A06B-6096-H206 |
| Amplifier type | Fanuc Alpha i SVM2-40/40i (2-axis servo amplifier module) |
| Rated output current | 40 A (L axis) / 40 A (M axis) |
| Control interface | FSSB (Fanuc Serial Servo Bus, fiber-optic) |
| Voltage class | 200 V class, DC link powered from a Fanuc Alpha i PS power supply module |
| Compatible motors | Fanuc Alpha i series servo motors in the 40 A class |
| Series family | A06B-6096 (single-axis, 2-axis, and 3-axis variants) |
| Status | Legacy series — superseded by newer αi generations, still widely installed |
Common A06B-6096-H206 Failures We See in Our Repair Lab
The 6096 series fails a little differently from the older 6079 units. Here is what actually comes across our bench:
- FSSB communication faults. The fiber-optic link is robust, but the optical connectors hate dust and rough handling. We regularly see “dead amplifier” tickets that turn out to be a contaminated or cracked FSSB cable end. Clean and reseat the connectors before condemning the module.
- IPM failure. Still the most common true hardware failure. On a 40 A unit, the usual root cause is a degraded motor winding or damaged power cable. Test the motor before you power the repaired amplifier.
- Aging electrolytic capacitors. These units are now 15–20 years old. Dried-out capacitors cause the classic pattern: intermittent alarms, or a unit that only faults after the machine reaches operating temperature.
- Cooling fan failure. A stalled fan leads to overheat alarms and, if ignored, IPM damage. Fan replacement is cheap; heat-damaged power stages are not.
- Control power damage from the PS module. When an Alpha i power supply module starts failing, it can take amplifier control circuits with it. If your H206 blew its control section, have the PS module tested too.
Not sure if your A06B-6096-H206 is really the problem? Send us the alarm code on the CNC screen and the LED status on the amplifier — our engineers will help you narrow it down before you order anything. [email protected]
A06B-6096 vs A06B-6079: Do Not Cross-Order
This is the most expensive mistake we see buyers make. The 6096 (Alpha i) and 6079 (classic Alpha) families look similar and share current ratings — the H206 exists in both — but they are not interchangeable:
- Interface: the 6096 uses FSSB fiber-optic communication; the 6079 does not. The CNC’s servo bus determines which family it can talk to.
- Motors and encoders: each family is built around its own motor generation and encoder protocol.
- Power supply modules: the DC link and control power pairing differ between generations.
Rule of thumb: replace like with like. Match the full model number on the nameplate — including the series (6096 vs 6079) and the exact suffix (H206). If the nameplate is unreadable, send us a photo of the unit and the CNC’s servo configuration screen, and we will identify it for you.
Repair or Replace: What Makes Sense?
| 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, FSSB port) |
| Tested replacement from stock | Moderate | Ships in 48 hours | Downtime is costly, or the unit is physically damaged |
| Untested surplus | Varies | Varies | Only if you can bench-test before installation |
For FSSB communication faults in particular, repair is usually fast and inexpensive — optical port and driver circuit work is routine for a properly equipped lab. For repeated IPM failures, insist that whoever repairs the unit also load-tests it, or the same fault will come back.
A06B-6096 Series In Stock at OUKE
We carry the A06B-6096 family in depth — for example the A06B-6096-H108 servo amplifier module — and we source specific variants like the H206 on request. Every unit is bench-tested before shipping, leaves our Dongguan warehouse within 48 hours, and carries a minimum 1-year warranty. No MOQ.
Repair is equally straightforward: standard turnaround is 3–5 working days, with a 99.5% first-pass success rate across our Fanuc servo repairs.
FAQ
What does SVM2-40/40i mean on the A06B-6096-H206?
SVM stands for Servo amplifier Module, “2” means two axes, “40/40” is the rated output current of each axis in amps, and the “i” marks it as part of the Alpha i generation with FSSB interface.
Is the A06B-6096-H206 interchangeable with the A06B-6079-H206?
No. Despite sharing the H206 suffix and 40 A rating, the 6096 is an Alpha i FSSB unit and the 6079 is the older classic Alpha generation. The interface, motors, and power supply pairing all differ. Always match the complete model number on your nameplate.
My CNC shows an FSSB alarm. Is the amplifier faulty?
Not necessarily. FSSB alarms are frequently caused by contaminated or damaged fiber-optic cables and connectors. Clean and reseat the connectors on both ends and check the cable for sharp bends before replacing hardware.
Is the A06B-6096-H206 still available new?
It is a legacy model no longer in active production. Tested used, refurbished, and repaired units from specialist suppliers like OUKE are the practical sourcing route.
How long does repair take?
Our standard repair turnaround is 3–5 working days with a minimum 1-year warranty. If downtime is critical, a tested unit ships from stock within 48 hours.
Get Your A06B-6096-H206 Back Running Fast
Need an A06B-6096-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.