The FANUC A06B-6166-H203 is a βiSV 40/40-B dual-axis servo amplifier module used in compatible FANUC CNC servo systems.

FANUC technical documentation classifies this model as a two-axis βiSV-B amplifier in the 200V input series. It controls two servo axes, identified as the L axis and M axis, within a compatible CNC drive configuration.

The official rated output current is 13 Arms per axis, while the rated maximum current is 40 Apeak per axis. The amplifier supports an output frequency range of 0–550Hz and uses sine-wave PWM control with an IGBT bridge.

The A06B-6166-H203 is commonly listed in organic search results as a FANUC βiSV 40/40-B Servo Amplifier, Beta iSV40/40 Servo Drive, Dual-Axis Servo Amplifier, or CNC Servo Drive Module.

It is suitable for replacing a confirmed faulty amplifier associated with servo alarms, failure of one or both axes to enable, unstable motor operation, abnormal amplifier indications, or damaged control and power circuitry.

• Dual-axis servo operation tested before shipment
  
• In stock and prepared for prompt dispatch
  
• Worldwide DHL, UPS, and FedEx shipping

Product Details

• Brand: FANUC
• Part Number: A06B-6166-H203
• Alternative Format: A06B6166H203
• Official Model: βiSV 40/40-B
• Common SEO Name: Beta iSV 40/40-B Servo Amplifier
• Type: Servo Amplifier Module / Servo Drive
• Amplifier Family: FANUC βiSV-B
• Axis Configuration: 2 Axis
• Axis Designations: L Axis / M Axis
• Main Power Input: 200–240VAC, Three Phase
• Input Frequency: 50/60Hz
• Main Input Current: 13 Arms
• Power-Supply Rating: 4.8kVA
• Control Power Input: 24VDC ±10%
• Control Power Current: 1.0A Max
• L-Axis Rated Output Current: 13 Arms
• M-Axis Rated Output Current: 13 Arms
• L-Axis Maximum Current: 40 Apeak
• M-Axis Maximum Current: 40 Apeak
• Output Frequency Range: 0–550Hz
• Dynamic Brake Circuit: Built In
• Main Circuit Control: Sine-Wave PWM with IGBT Bridge
• Operating Temperature: 0°C to 55°C
• Approximate Weight: 3.9kg
• Power PCB: A16B-3200-0643
• Control PCB: A20B-2101-0881
• Product Series: A06B-6166
• Application: FANUC CNC Servo Systems
• Category: FANUC Servo Amplifier / Dual-Axis Servo Drive

The electrical ratings, PCB references, dimensions-related classification, and axis configuration above follow FANUC βiSV-B technical documentation.

Referenced CNC Families

FANUC documentation lists the two-axis A06B-6166 βiSV-B amplifier family for applicable configurations within:

• FANUC Series 30i-B
• FANUC Series 31i-B
• FANUC Series 32i-B
• FANUC Series 35i-B
• FANUC Power Motion i-Model A
• FANUC Series 0i-F

These are amplifier-family references rather than confirmation that the A06B-6166-H203 is compatible with every machine using one of these CNC families.

Compatibility Note

Before ordering the A06B-6166-H203, please verify:

• Complete FANUC amplifier part number
• Model marking βiSV 40/40-B
• Two-axis amplifier requirement
• 200–240VAC three-phase input configuration
• Connected servo-motor models for both axes
• Original terminal and connector arrangement
• Power PCB and control PCB numbers
• CNC control model and servo parameters
• Amplifier hardware revision and alarm history

Do not confuse the A06B-6166-H203 βiSV 40/40-B with the lower-output A06B-6166-H201#A βiSV 20/20-B. FANUC lists different rated currents, power PCBs, dimensions, and amplifier capacities for the two models.

Common Use Cases

• FANUC βiSV 40/40-B amplifier replacement
• Dual-axis CNC servo-drive maintenance
• Troubleshooting faults affecting one or both axes
• Diagnosis of servo motors that cannot enable
• Repair of unstable or intermittent axis operation
• Replacement of damaged amplifier power or control circuitry
• Preparation of a tested spare drive for machine maintenance

Sales & Support

Each A06B-6166-H203 servo amplifier is inspected and tested under applicable operating conditions before delivery.

Worldwide delivery is available through DHL, UPS, FedEx, and other express carriers. REACO CNC provides servo-amplifier repair service, warranty coverage, testing-video support, and technical assistance for FANUC CNC drive systems.