Description
🔧 FANUC A06B-6114-C303 – Alpha i Servo Amplifier (3-Axis, Compact Type)
FANUC A06B-6114-C303 Servo Amplifier
🧠 Model Description
A06B-6114-C303 is a FANUC Alpha i (αi) servo amplifier module from the 6114 series, designed for 3-axis control in a compact (C-type) design.
👉 Common designation: SVM3-20/20/20i (Compact type)
⚙️ Key Technical Details
- Type: AC Servo Amplifier
- Series: Alpha i (αi) – 6114
- Variant: C-type (compact version)
- Axes: 3 axes (triple-axis)
- Model: SVM3-20/20/20i
-
Current Rating:
- Axis 1 → 20A
- Axis 2 → 20A
- Axis 3 → 20A
- Communication: FSSB (fiber optic servo bus)
⚙️ What “C303” Means
- C = Compact / integrated amplifier design
-
303 =
- 3-axis module (SVM3)
- Medium power rating (20/20/20)
👉 Equivalent to:
- H303 (same rating, larger standard module)
⚙️ What It Does
This amplifier:
- Drives three servo motors simultaneously
- Provides:
- Position control
- Speed control
- Torque control
- Ensures synchronized multi-axis motion
- Communicates with CNC via FSSB (fiber optic link)
👉 Simple explanation:
A compact 3-axis amplifier for medium-power CNC axes.
🏭 Applications
- CNC machining centers
- CNC milling machines
- Medium-load multi-axis systems
- Machines with limited cabinet space
Typical use:
- X, Y, Z axes (standard load machines)
🔍 Key Features
- ✔ 3-axis integrated amplifier (space saving)
- ✔ Medium power (20/20/20)
- ✔ Compact “C-type” design
- ✔ High precision and synchronization
- ✔ Compatible with αi servo motors
⚠️ Important Notes
- C303 = compact version of H303
- Same electrical performance, smaller footprint
- Requires:
- Matching αi power supply module (PSM)
- Compatible servo motors
- Commonly repaired/refurbished
🧠 Simple Explanation
👉 A06B-6114-C303 is a compact 3-axis FANUC servo amplifier designed for medium-power applications, controlling three CNC axes in a space-saving unit.

