A06B-6111-H006#H550 Fanuc Spindle Drive A06B6111H006#H550 New Sealed
PRODUCT DETAILS
Fanuc A06B-6111-H006#H550 | αiSP Spindle Amplifier Module | 5.5 kW · 200 V | New Sealed Part Number: A06B-6111-H006#H550 | Alt. Reference: A06B6111H006#H550 | Brand: Fanuc | Series: αiSP (Alpha-i Spindle Amplifier) | Condition: New, Factory Sealed
What This Unit Is — Plain and PreciseThe A06B-6111-H006#H550 is a Fanuc αiSP series spindle amplifier module — the drive unit that converts DC bus power into controlled three-phase AC output to run the CNC machine's spindle motor. It is not a servo axis amplifier; it is specifically engineered for spindle duty: variable-speed, high-power, high-torque motor control from zero to maximum spindle RPM under constant CNC command.This is a new, factory-sealed genuine Fanuc unit — not refurbished, not repaired, not surplus pull-out.
The 6111 series is the stand-alone αiSP spindle amplifier — distinct from the αiSVSP combined servo/spindle units (6117/6121 series). It is installed as a dedicated spindle module on the Fanuc αi amplifier bus alongside servo axis modules.
The αiSP (A06B-6111) is the dedicated spindle drive module on the shared DC bus. It takes DC bus voltage from the PSM and outputs variable-frequency, variable-voltage three-phase AC to the spindle motor. All communication with the CNC controller travels over the FSSB (Fanuc Serial Servo Bus) — a high-speed serial link that carries speed commands, position feedback, alarm data, and parameter updates between the CNC and each amplifier module.
The built-in regenerative resistor is significant: during spindle deceleration, the motor acts as a generator and feeds energy back into the DC bus. If this energy exceeds what other drives on the bus can absorb, it must be dissipated. The #H550 configuration includes an integrated resistor to handle moderate regenerative loads without requiring an external regenerative resistor unit. For high-inertia spindles with frequent rapid deceleration cycles, the external resistor capacity of the PSM may also be required.
In most cases, the spindle amplifier module itself has failed — typically the internal IGBT power stage (similar to the A50L-type IPM modules), the gate driver PCB, or the DC bus capacitors in older units. A new A06B-6111-H006#H550 replacement resolves the hardware failure and restores full spindle operation.
For CNC machines in production environments — where spindle downtime costs hundreds to thousands per hour — using a genuine Fanuc module eliminates all compatibility unknowns.
What This Unit Is — Plain and PreciseThe A06B-6111-H006#H550 is a Fanuc αiSP series spindle amplifier module — the drive unit that converts DC bus power into controlled three-phase AC output to run the CNC machine's spindle motor. It is not a servo axis amplifier; it is specifically engineered for spindle duty: variable-speed, high-power, high-torque motor control from zero to maximum spindle RPM under constant CNC command.This is a new, factory-sealed genuine Fanuc unit — not refurbished, not repaired, not surplus pull-out.
Part Number Decoded
Understanding the full part number eliminates ordering errors:| Segment | Meaning |
|---|---|
| A06B | Fanuc amplifier product family |
| 6111 | αiSP series spindle amplifier module |
| H006 | Power rating: 5.5 kW continuous spindle output |
| #H550 | Variant suffix: 200 V AC input series, standard configuration |
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | A06B-6111-H006#H550 |
| Series | Fanuc αiSP (Alpha-i Spindle Amplifier) |
| Amplifier Type | Spindle amplifier module (stand-alone) |
| Continuous Output Power | 5.5 kW |
| DC Bus Input Voltage | 283 V DC (from αi PSM power supply module, 200 V AC series) |
| AC Input (via PSM) | 200–240 V AC, 3-phase |
| Rated Output Current | Approx. 30 A (motor-dependent) |
| Maximum Output Frequency | 400 Hz |
| Speed Range | 0–4,500 RPM (motor-dependent; up to 10,000+ RPM with high-speed spindle motors) |
| Feedback Interface | αi Pulsecoder / MZ sensor / BZ sensor |
| Communication | FSSB (Fanuc Serial Servo Bus) |
| Cooling | Forced air (internal fan); requires cabinet ventilation |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | −20 °C to +60 °C |
| Humidity | 90% RH max (non-condensing) |
| Dimensions | Standard αi module form factor (mounts on αi amplifier bus) |
| Compatible CNC Series | Series 0i-D/F, 16i/18i/21i, 30i/31i/32i, 160i/180i/210i |
| Compatible PSM | A06B-6110 αiPS series (200 V series) |
| Condition | New, factory sealed |
Exact output current and motor compatibility should be verified against the Fanuc αi Series Spindle Amplifier Descriptions manual (B-65272EN) and the motor-amplifier combination table for the specific spindle motor in the machine.
How the αiSP Fits Into the CNC Drive Architecture
Understanding where this module sits in the machine helps clarify why it matters:3-Phase AC Mains (200–240 V AC)
│
▼
┌─────────────────────┐
│ αiPS Power Supply │ ← A06B-6110 series (PSM)
│ Module (PSM) │ Converts AC mains → DC bus
└────────┬────────────┘
│ DC Bus (283 V DC)
├──────────────────────────────┐
▼ ▼
┌──────────────────┐ ┌──────────────────────┐
│ A06B-6111-H006 │ │ αiSV Servo Axis │
│ #H550 αiSP │ │ Amplifiers (×1–3) │
│ Spindle Amp │ │ A06B-6117 series │
└────────┬─────────┘ └──────────────────────┘
│
▼
Spindle Motor Output
(3-phase AC, variable frequency)
│
▼
CNC Spindle Motor
(αiI / BiI / αiF spindle motor)The #H550 Suffix — What It Specifies
The #H550 option suffix on Fanuc spindle amplifiers carries specific configuration information:| Character | Meaning |
|---|---|
| H | Hardware/option code prefix |
| 5 | 200 V AC input voltage series (standard; as opposed to 400 V HV series) |
| 5 | Built-in regenerative resistor equipped |
| 0 | Standard configuration (no additional special options) |
Common Fault Scenarios This Unit Resolves
Most engineers searching for this part number are troubleshooting a production-down situation. Here is the diagnostic picture.When the A06B-6111-H006#H550 fails in service, the Fanuc CNC typically displays one or more of the following alarms:
| Alarm Code | Description |
|---|---|
| SP740 | Spindle amplifier overcurrent |
| SP741 | Spindle motor overload |
| SP749 | IPM overheat (internal power module thermal trip) |
| SP751 | DC bus overvoltage |
| SP9000–SP9099 | Internal spindle amplifier error codes |
| Alarm 9 (older systems) | Spindle drive fault (Series 16i/18i/21i format) |
αiSP Series Power Range — Selecting the Right Module
The A06B-6111 αiSP series covers a range of spindle power ratings. The table below positions the H006 within the series:| Model | Power Rating | Typical Spindle Application |
|---|---|---|
| A06B-6111-H002 | 1.5 kW | Small machining centres, light-duty spindles |
| A06B-6111-H004 | 3.7 kW | Mid-range VMC/HMC spindles |
| A06B-6111-H006 | 5.5 kW | Standard mid-to-large VMC spindles ← this unit |
| A06B-6111-H011 | 7.5 kW | Heavy-duty machining centres |
| A06B-6111-H015 | 11 kW | Large turning centres, high-power spindles |
| A06B-6111-H022 | 15 kW | Heavy-duty turning and milling |
Important: Always verify the required spindle amplifier power rating against the spindle motor's nameplate and the machine's original Bill of Materials or service documentation. Installing an undersized amplifier (e.g. H004 in place of H006) will result in overload trips and spindle alarm faults under cutting load.
Compatible Spindle Motors for A06B-6111-H006The 5.5 kW αiSP H006 is commonly paired with Fanuc spindle motors including:
- A06B-0852 series (αiI 3/10000 — 3 kW built-in spindle motor, 10,000 RPM)
- A06B-0854 series (αiI 6/10000 — 5.5 kW, 10,000 RPM)
- A06B-0712 series (αiF 4/5000 — separate spindle motor, 4 kW)
- A06B-0714 series (αiF 6/5000 — 5.5 kW, 5,000 RPM)
Before Ordering — A Verification Checklist
At $1,041, confirming compatibility before ordering prevents costly returns:- ✅ Read the exact part number from the existing module's label — confirm it is A06B-6111-H006#H550 (H006 power class, #H550 voltage series)
- ✅ Confirm your PSM (power supply module) is the 200 V series (A06B-6110 αiPS series) — the #H550 variant is for 200 V AC input systems, not 400 V HV systems
- ✅ Check the CNC control series — αiSP is compatible with Series 0i-D/F, 16i/18i/21i, 30i/31i/32i; it is NOT compatible with Series 0 (analogue), Series 15, or older non-FSSB systems
- ✅ Confirm spindle motor nameplate power is ≤5.5 kW continuous for this amplifier class
- ✅ Before fitting the new amplifier, verify the spindle motor winding insulation resistance (should be >1 MΩ phase-to-earth) — a shorted motor will destroy the replacement amplifier
Genuine OEM vs Non-OEM Spindle Amplifiers
Spindle amplifiers are high-value, safety-critical components. Non-genuine alternatives carry significant risk:| Factor | Fanuc A06B-6111-H006#H550 (OEM) | Non-OEM / Generic |
|---|---|---|
| FSSB communication compatibility | ✅ Fanuc proprietary protocol, guaranteed | ❌ May not communicate correctly |
| Firmware / parameter compatibility | ✅ Pre-loaded Fanuc spindle firmware | ❌ Unknown — may require Fanuc service |
| IPM power stage reliability | ✅ Fanuc-specified components | ❌ Unknown component sourcing |
| Alarm code / diagnostic reporting | ✅ Correct SP-series alarm mapping | ❌ May report incorrect or no alarms |
| CE / UL compliance | ✅ | ❌ Undocumented |
| Traceability | ✅ Full OEM serial number traceability | ❌ None |
Ordering & Delivery
- ✅ New, factory-sealed genuine Fanuc unit — serial number traceable
- ✅ In Stock — dispatches within 1–3 working days
- ✅ Global express shipping — DHL / FedEx priority for production-down situations
- ✅ Reinforced anti-static export packaging — electronics-safe transit
- ✅ Pre-order compatibility checks — contact us with your machine model and CNC series
- ✅ 15+ years Fanuc drive and motor supply experience
Frequently Asked Questions