A06B-6117-H103 FANUC AC Servo Amplifier Unit A06B6117H103 A06B-6117-H103

FANUC A06B-6117-H103 Alpha i Servo Amplifier Module AiSV 20

Product Description

The A06B-6117-H103 is a single-axis Alpha i servo amplifier module identified by FANUC as αi SV 20. In FANUC’s αi maintenance manual, this order specification is listed in the 200VAC-input single-axis amplifier group, and the common SVM specification ties the family to i-Series CNCs (Model B) with the FSSB interface.

This is the type of amplifier used where the machine needs a dedicated one-axis servo channel rather than a combined multi-axis module.

For the technical buyer, the key spec is the current class.

FANUC’s specification table gives 6.5 Arms rated output current and a 20 Apeak nominal current limit for SVM1-20i, which is the same current class represented by αi SV 20 in the configuration table.

FANUC also lists the common SVM control method as sine-wave PWM control with a transistor (IGBT) bridge, which is part of what gives this amplifier family its predictable behavior in CNC servo applications.

Mechanically, the αi lineup places the 20i class in the 60 mm-wide, no-external-fin group, and the external-dimensions section maps SVM1-20i to Outline Drawing 1 / Panel Cut-out 1 / Maintenance Area 1.

That makes the H103 one of the more compact αi servo amplifier formats, which is often useful in cabinets where space is limited and the original panel design was built around narrower single-axis modules.

From a product-page standpoint, the H103 is best positioned as a model-specific replacement for installed FANUC αi servo systems.

It is not a broad “fits many machines” amplifier; it is a clearly defined single-axis 20-class FSSB servo amplifier.

For machine rebuilders, MRO buyers, and service departments, that clarity is exactly what makes the part useful.

When the job is to restore stable servo control without changing the original architecture, the right one-axis αi model saves time and reduces avoidable startup issues.

Technical Data

FAQ

Q1: What is A06B-6117-H103 in FANUC’s official model naming?
FANUC identifies the part as αi SV 20 in the αi maintenance manual. In the companion descriptions manual, the corresponding 20-class single-axis amplifier appears as SVM1-20i, with the same rated current class.

Together, those manual entries establish the H103 as a single-axis Alpha i 20-class servo amplifier.

Q2: What output class does this amplifier belong to?
The FANUC SVM specification table assigns 6.5 Arms rated output current and 20 Apeak nominal current limit to the SVM1-20i class.

For buyers and technicians, that is the essential electrical identity of the H103: it belongs to the 20-class single-axis amplifier group, not the 40-class or higher-capacity variants.

Q3: What type of CNC interface is associated with this model family?
FANUC states in the common SVM specification that this servo amplifier family is for i-Series CNCs (Model B) with the FSSB interface.

That matters because a correct replacement is not determined by current class alone. 

The amplifier also has to match the communication method used by the CNC and the drive system around it.

Q4: Is the H103 a compact cabinet model?
Yes, in the αi lineup it is grouped in the 60 mm-wide class without external fin, and the external-dimensions section links the single-axis 20i model to Outline Drawing 1 / Panel Cut-out 1 / Maintenance Area 1.

In practical panel terms, that places it among the more compact αi amplifier bodies, which is helpful when working inside cabinets designed for narrower single-axis modules.

Q5: What should be checked before replacing an A06B-6117-H103?
The service team should verify the exact order specification on the installed amplifier, confirm the machine’s FSSB-based αi architecture, and make sure the replacement matches the original one-axis 20-class requirement.

It is also wise to confirm panel fit and surrounding cooling condition.

On FANUC servo systems, matching the exact amplifier class is one of the safest ways to avoid extended commissioning work after installation.