The A06B-6087-H130 is the Fanuc Alpha PSM-30 — a 30 kW power supply module that feeds the DC link for every servo and spindle amplifier in the cabinet. It is the bigger brother of the PSM-26, built for machines with heavier axis loads and larger spindles. Those bigger loads also mean it fails in its own characteristic ways, especially around regenerative energy. This guide covers the specs, the failures we see most in our repair lab, and when a PSM-30 is the right answer — including as an upgrade for a PSM-26.
What Is the A06B-6087-H130?
The A06B-6087-H130 — the PSM-30 — is a 30 kW power supply module in the Fanuc Alpha 6087 series. It converts 3-phase 200 V class mains into the DC link voltage that powers the cabinet’s servo amplifier modules and spindle amplifier module, and it absorbs regenerative energy every time a large axis or spindle decelerates.
You typically find the PSM-30 on larger machining centers and lathes — machines where a big spindle and heavy axes share one power supply. That duty cycle matters for reliability: every rapid deceleration of a large spindle pushes energy back through this module. Unsure how the PSM fits the rest of the Fanuc module family? Our A06B series model number guide maps it out.
A06B-6087-H130 Specifications
| Item | Specification |
|---|---|
| Model | A06B-6087-H130 |
| Module type | Fanuc Alpha PSM-30 (power supply module) |
| Rated capacity | 30 kW |
| Input | 3-phase, 200 V class mains |
| Output | DC link for connected SVM servo and spindle amplifier modules |
| Regeneration | Regenerative discharge to the line |
| Series family | A06B-6087 (PSM power supply modules in multiple capacities) |
| Closest sibling | A06B-6087-H126 (PSM-26, same platform, 26 kW) |
| Status | Legacy series — no longer in active production |
Common A06B-6087-H130 Failures We See in Our Repair Lab
The PSM-30 shares the classic power supply failure modes with its smaller siblings — but its regenerative workload adds a signature failure pattern of its own:
- Regenerative circuit damage. The signature PSM-30 failure. Large spindles decelerating hard push serious energy back into the module. Over years, the regeneration components degrade — symptoms start as overvoltage alarms during spindle deceleration and end with a damaged converter section.
- Converter / IGBT failure. Mains spikes, lightning, or a downstream short. Usually presents as instant fuse failure at power-on. Never just replace fuses and retry — find the short first.
- Precharge / inrush circuit failure. The soft-start circuit that charges the DC link wears out on aging units. The module then fails to reach ready state or blows fuses at power-up.
- Cooling fan failure. A 30 kW module without airflow overheats fast. On machines with heavy spindle duty, fan maintenance is cheap insurance.
- Capacitor aging. After 15–20 years, dried-out capacitors cause erratic faults and poor ride-through on mains dips — often misread as “plant power problems.”
Getting overvoltage alarms when the spindle slows down? That pattern usually points at the PSM’s regenerative circuit. Send us the alarm code and when it occurs — our engineers will confirm before you order anything. [email protected]
Overvoltage on Deceleration: The PSM-30’s Telltale Sign
One diagnostic pattern is worth calling out because it is so common on PSM-30 installations:
- Note when the alarm occurs. An overvoltage fault that appears specifically during spindle or axis deceleration points at the regeneration path — not at normal operation circuits.
- Check the trend. Regenerative degradation is progressive. Alarms that were rare last year and weekly now mean the circuit is wearing out, and a full converter failure is coming.
- Act before the hard failure. A planned repair of a degrading PSM costs less than an emergency replacement after the converter section goes — and it avoids the collateral damage a hard failure can cause to downstream amplifiers.
Compatibility: PSM-30, PSM-26, and the Upgrade Question
- H130 replacing an H126 (PSM-26) — often a smart move. The PSM-30 is the same platform with more headroom, and oversizing a power supply is generally acceptable. If your PSM-26 has failed repeatedly or your machine runs near capacity, the PSM-30 is the natural upgrade. Confirm cabinet layout and connectors first.
- H126 replacing an H130 — not recommended. Undersizing the supply risks overload faults and converter damage under peak loads.
- Alpha i generation (A06B-6110 / 6140) — not interchangeable with the classic 6087 series despite similar capacity ratings. Different control interface and module pairing.
For broader context on Fanuc power supply generations, see our Fanuc power supply module comparison.
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 in the regenerative, converter, precharge, or fan circuits |
| Tested replacement from stock | Moderate | Ships in 48 hours | The machine is down and downtime costs more than the part |
| Untested surplus | Varies | Varies | Only if you can bench-test before installation |
Regenerative circuit repairs in particular must be validated under load — a module that passes a no-load power-up can still dump its energy incorrectly the first time the spindle decelerates. Every PSM we repair or sell is load-tested before it ships.
A06B-6087 Series In Stock at OUKE
We carry the Alpha 6087 PSM family, including the A06B-6087-H126 PSM-26, and we source the PSM-30 (A06B-6087-H130) and other capacities on request. Every module is bench-tested under load, ships from our Dongguan warehouse within 48 hours, and carries a minimum 1-year warranty with no MOQ.
Repair turnaround is 3–5 working days standard, with a 99.5% first-pass success rate on Fanuc power supply repairs.
FAQ
What does PSM-30 mean on the A06B-6087-H130?
PSM stands for Power Supply Module, and 30 is the rated capacity — 30 kW. The module converts 3-phase 200 V class mains into the DC link power feeding the cabinet’s servo and spindle amplifier modules.
Is the A06B-6087-H130 discontinued?
Yes. The classic Alpha 6087 series is no longer in active production. Tested used, refurbished, and repaired units from specialist suppliers like OUKE are the practical sourcing route.
Can a PSM-30 replace a PSM-26?
In many installations, yes — it is the same platform with more capacity, and oversizing is generally acceptable. It is the natural upgrade if a PSM-26 has failed repeatedly. Confirm cabinet layout and connectors first. The reverse — a PSM-26 replacing a PSM-30 — is not recommended.
Why does my PSM alarm only when the spindle decelerates?
That is the classic sign of a degrading regenerative circuit. Decelerating a large spindle pushes energy back into the PSM, and worn regeneration components can no longer absorb it. The condition is progressive — plan a repair before the converter section fails completely.
How long does PSM repair take?
Our standard repair turnaround is 3–5 working days with a minimum 1-year warranty. If downtime is critical, a tested replacement ships from stock within 48 hours.
Get Your A06B-6087-H130 Back Running Fast
Need a tested A06B-6087-H130 or a repair quote for your failed PSM? 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.