The FANUC A06B-6240-H306 is an αiSV 20/20/40-B three-axis servo amplifier module used in compatible FANUC CNC servo systems.

FANUC technical documentation classifies it as a standard 200V-series αiSV-B servo amplifier, designed to control three servo axes identified as the L, M, and N axes.

The official rated output currents are:

• L Axis: 6.5 Arms
• M Axis: 6.5 Arms
• N Axis: 13 Arms

The corresponding nominal peak-current limits are 20 Apeak, 20 Apeak, and 40 Apeak. The amplifier supports a servo output frequency range of 0–550Hz.

The A06B-6240-H306 is commonly found in organic search results under names such as FANUC Servo Amplifier Module, AiSV 20/20/40-B Servo Drive, Alpha i-B Triple-Axis Amplifier, and 3-Axis CNC Servo Drive.

It is suitable for replacement when a confirmed amplifier fault causes servo alarms, failure of one or more axes to enable, unstable motor operation, communication problems, abnormal amplifier indications, or damage to the internal power and control circuits.

• Three-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-6240-H306
• Alternative Format: A06B6240H306
• Official Model: αiSV 20/20/40-B
• Common SEO Name: AiSV 20/20/40-B Servo Amplifier
• Type: Servo Amplifier Module / Servo Drive
• Amplifier Family: FANUC αiSV-B
• Axis Configuration: 3 Axis
• Input Classification: 200V Series
• L-Axis Rated Output Current: 6.5 Arms
• M-Axis Rated Output Current: 6.5 Arms
• N-Axis Rated Output Current: 13 Arms
• L-Axis Nominal Current Limit: 20 Apeak
• M-Axis Nominal Current Limit: 20 Apeak
• N-Axis Nominal Current Limit: 40 Apeak
• Servo Output Frequency: 0–550Hz
• Main Circuit Control: Sine-Wave PWM with IGBT Bridge
• 24V Control-Power Current: 1.4A
• Approximate Weight: 4.0kg
• Product Series: A06B-6240
• Application: FANUC CNC Servo Systems
• Category: FANUC Servo Amplifier / Triple-Axis Servo Drive

The model designation, axis count, current ratings, frequency range, control method, control-power consumption, and reference weight above follow FANUC technical documentation.

Referenced CNC Families

FANUC documentation lists the αiSV-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-Model D

These are amplifier-family references and do not mean that the A06B-6240-H306 is compatible with every machine using one of these CNC families.

Compatibility Note

Before ordering the A06B-6240-H306, please verify:

• Complete FANUC amplifier part number
• Model marking αiSV 20/20/40-B
• Three-axis amplifier requirement
• 200V-series servo-system configuration
• Connected servo-motor models for all three axes
• Original terminals and connector arrangement
• CNC control model and servo parameters
• Amplifier hardware and software revision
• Whether the standard H306 or upgraded H326 specification is required

The A06B-6240-H326 has the same αiSV 20/20/40-B model designation but is listed by FANUC as an upgraded version with STO3-axis support. It should not be treated as automatically interchangeable with the H306 without checking the machine’s safety and amplifier configuration.

Common Use Cases

• FANUC αiSV 20/20/40-B amplifier replacement
• Three-axis CNC servo-drive maintenance
• Troubleshooting faults affecting one or more servo axes
• Diagnosis of unstable or non-responsive motor operation
• Repair of servo amplifier control or power circuitry
• Replacement of a physically damaged amplifier module
• Preparation of a tested spare drive for machine maintenance

Sales & Support

Each A06B-6240-H306 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.