The FANUC A06B-6240-H103 servo amplifier module provides reliable motion control for single-axis applications, specifically the L-axis (linear or rotary axis) in FANUC CNC systems. This 3-phase amplifier converts DC bus power (283-339 VDC) into regulated AC output ranging from 200 to 240 VAC, with a flexible frequency range of 0 to 550 Hz. Its 6.5A rated output current suits medium-duty axes such as turrets, tailstocks, or auxiliary slides. Furthermore, the module weighs only 4.99 kg, making it ideal for space-constrained cabinets. The unit operates across a wide temperature range (0°C to 55°C) and supports both 50 Hz and 60 Hz input frequencies. Many maintenance teams choose this model for its straightforward integration with FANUC Series 0i and 30i control systems.
The A06B-6240-H103 amplifier operates with a rated output current of 6.5A for the L-axis, supporting motors with similar current requirements. Its output voltage spans 200 to 240 VAC (3-phase), while the output frequency can be adjusted from 0 to 550 Hz, enabling precise speed control from standstill to high-speed rotation. On the input side, this module requires a DC voltage between 283 and 339 VDC – typically supplied by a FANUC ALPHA power supply (e.g., A06B-6077-H106). The rated input current is 9A at 283V, with a peak capability for short acceleration phases. Input frequency compatibility covers both 50 Hz and 60 Hz mains without configuration changes. Moreover, the unit features built-in overcurrent and overtemperature protection, automatically shutting down under fault conditions. The amplifier uses IGBT power stages with PWM control for high efficiency (approx. 97%) and low harmonic distortion.
This FANUC servo amplifier measures compactly to fit standard 19-inch racks or DIN-rail mounting configurations. Its weight of 4.99 kg (11.00 lbs) allows single-person handling during installation. The operating ambient temperature range is 0°C to 55°C (32°F to 131°F), with derating required above 45°C at full continuous current. Relative humidity tolerance spans 30% to 95% (non-condensing), suitable for most indoor factory environments. For vibration, the unit withstands up to 4.9 m/s² (0.5G) at 10-55 Hz. The enclosure offers IP20 protection, requiring installation inside a control cabinet with adequate ingress protection. Additionally, the module requires 100 mm clearance above and below for natural convection cooling – no forced air fan is integrated, so cabinet ventilation must handle the dissipated heat (approx. 150W at full load).
Before mounting the A06B-6240-H103, verify that the DC bus voltage from the power supply is stable between 283-339 VDC. First, secure the amplifier to a flat vertical surface using M4 screws through the mounting tabs – apply 2.5 N•m torque evenly. Next, connect the DC input terminals (P and N) to the power supply bus using cables rated for at least 15A with ring lugs. Remember to connect the motor power output (U, V, W) to the corresponding L-axis motor terminals, observing phase sequence (U-V-W) for correct rotation direction. Additionally, wire the encoder feedback cable (JX or JY connector) to the axis control board for position/speed feedback. For the control I/O, connect the emergency stop and enable signals according to the FANUC connection diagram. Finally, power on the DC bus and enable the amplifier; verify the motor runs smoothly at low speed before full operation.
1 x FANUC A06B-6240-H103 Servo Amplifier Module (L-axis)
1 x Terminal cover (pre-installed on front panel)
1 x Connector kit for control signals (20-pin)
1 x Mounting screw set (M4 x 4 pieces)
Note: No motor power cables, encoder cables, or DC bus cables are included. Certificates and warranty documents are not provided in this package.
1. Which FANUC motors are compatible with the A06B-6240-H103?
This amplifier drives FANUC αi and βi series servo motors with rated currents up to 6.5A for the L-axis – typical models include αiS 3/4, αiS 6, and βiS 4/6 series.
2. Can the A06B-6240-H103 control axes other than the L-axis?
While designated for L-axis (linear or rotary auxiliary axes), it can also control additional standard axes if the CNC system permits axis assignment changes – consult your FANUC parameter manual.
3. What is the output frequency range of this FANUC servo amplifier?
It covers 0 to 550 Hz, accommodating motor speeds from near-zero to maximum rated RPM (typically 3000-6000 RPM depending on the motor pole count).
4. How do I protect the A06B-6240-H103 from overheating in a sealed cabinet?
Install a cabinet cooling fan (at least 50 CFM) directed toward the amplifier's heat sink, or derate output current by 10% if ambient temperature exceeds 45°C.
5. Is the A06B-6240-H103 compatible with 380 VAC systems?
No – this unit requires a DC input of 283-339 VDC, which is derived from 200 VAC input power supplies. For 380 VAC systems, use FANUC's 400 V-class amplifiers (A06B-62xx series with "-H5xx" suffix).
| Brand Name | |
| Model No. | A06B-6240-H103 |
| Product Type | Servo Amplifier Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
