A06B-6117-H206 FANUC AC Servo Amplifier Unit A06B6117H206 AO6B-6II7-H2O6

FANUC A06B-6117-H206 Alpha i Servo Amplifier Module AiSV 20/40

Product Description

The A06B-6117-H206 is a 2-axis Alpha i servo amplifier module listed by FANUC as αi SV 20/40. In the FANUC configuration tables, this order specification appears in the 200VAC-input servo-amplifier family and belongs to the group used with i-Series CNCs through the FSSB interface.

That makes it a defined dual-axis amplifier for machines that need one lighter-capacity axis and one larger-capacity axis in the same module body.

Its value lies in that mixed-axis arrangement. FANUC’s specification table shows the L-axis rated at 6.5 Arms with a 20 Apeak nominal current limit, while the M-axis is rated at 13 Arms with a 40 Apeak nominal current limit.

That asymmetric structure is exactly why the H206 is not interchangeable with the 20/20 or 40/40 versions just because they belong to the same family. For an engineer or parts buyer, the 20/40 pairing is the core identity of the product.

FANUC’s lineup and mechanical grouping place SVM2-20/40i in the 60 mm-wide, external-fin frame category, and the external-dimensions section maps this model to Outline Drawing 2 / Panel Cut-out 2 / Maintenance Area 1. That matters in real panels.

A replacement amplifier is only useful if it fits the existing cabinet space, cooling path, and mounting plan without forcing unnecessary modifications.

Commercially, the H206 is the sort of part buyers typically source for exact replacement rather than speculative substitution.

In service situations, keeping the original mixed-axis amplifier arrangement often avoids parameter confusion, simplifies recommissioning, and keeps the electrical layout aligned with the machine builder’s original design.

That is why the correct FANUC designation matters so much: A06B-6117-H206 = αi SV 20/40 = dual-axis mixed-current servo amplifier.

Technical Data

FAQ

Q1: What is the official FANUC designation for A06B-6117-H206?
FANUC lists this model as αi SV 20/40 in the αi maintenance manual, and the descriptions manual identifies the same current class as SVM2-20/40i.

In plain terms, it is a two-axis servo amplifier where the two channels do not share the same output class. 

That mixed structure is the defining feature of the module.

Q2: What are the rated output values of this amplifier?
The FANUC SVM specification table shows the L-axis at 6.5 Arms with a 20 Apeak nominal current limit and the M-axis at 13 Arms with a 40 Apeak nominal current limit. This is the key technical distinction of the H206.

It is not a balanced 20/20 amplifier and not a balanced 40/40 amplifier; it is intentionally split across two different servo current classes.

Q3: Why is the H206 not interchangeable with other two-axis αi amplifiers?
Because in the FANUC αi family, two-axis modules are organized by specific current combinations.

A 20/40 unit is selected differently from a 20/20 or 40/40 unit, and that difference affects the motor/amplifier match and the axis-side electrical behavior. 

Using a physically similar module from the wrong current class can turn a simple replacement into a commissioning problem.

Q4: What cabinet format does this model use?
FANUC’s lineup groups this class under the 60 mm-wide amplifier family with external fin, and the external-dimensions section maps SVM2-20/40i to Outline Drawing 2, Panel Cut-out 2, Maintenance Area 1.

For a maintenance engineer, that is useful because it gives a grounded starting point for checking cabinet fit, cut-out compatibility, and required service clearance before installation.

Q5: What should be verified before buying this part?
The installed order specification should be checked first, followed by the axis arrangement, interface type, and cabinet format.

Since the FANUC manual ties this amplifier family to i-Series CNCs with FSSB, it is important to confirm that the machine still uses the same control architecture.

Exact model matching is especially important on mixed-axis modules like this one because the unit’s value is in its specific 20/40 combination, not just its appearance.