Part of the Fanuc CNC Systems family.
Overview
CNC Mainboards (A03B)
CNC Mainboards (A03B) is part of the Fanuc CNC Systems family. Palm Parts Solution stocks CNC Mainboards (A03B) units in new, refurbished, and surplus condition, all with tested warranty and same-day quotes on available to quote catalog numbers.
Overview
CNC Mainboards (A03B) delivers the performance, connectivity, and I/O density required by modern industrial applications while retaining backward compatibility with earlier CNC Systems hardware where applicable. Typical deployments include OEM machinery, process skids, retrofit projects, and plant-wide control architectures built on the Fanuc ecosystem.
Why specify CNC Mainboards (A03B)
- Tight integration with Fanuc engineering software
- Documented spare-parts availability
- Proven service life across heavy-duty industries
- Compatible accessories: power supplies, communication adapters, terminal blocks
What Palm Parts Solution provides
- Tested CNC Mainboards (A03B) catalog numbers available to quote
- Cross-reference assistance for obsolete part numbers
- Quotes on full CNC Mainboards (A03B) bills of material
- Engineering support for replacements and migrations
CNC Mainboards (A03B) parts

FANUC A03B-0807-C104
$517.00

FANUC A03B-0807-C154
$683.99

FANUC A03B-0807-C161
$693.00

FANUC A03B-0815-C001
$265.99

FANUC A03B-0815-C002
$678.99

FANUC A03B-0815-C003
$259.00

FANUC A03B-0815-C041
$1,263.99

FANUC A03B-0819-C001
$664.00

FANUC A03B-0819-C002
$421.99

FANUC A03B-0819-C011
$415.99

FANUC A03B-0819-C052
$794.00

FANUC A03B-0819-C104
$384.99
Specifications
CNC Mainboards (A03B) technical reference
Each CNC Mainboards (A03B) catalog number has its own electrical, mechanical, and environmental specification. Use the search bar to locate an exact part number, or contact Palm Parts Solution with the catalog number on the nameplate for:
- Input/output voltage and current
- Communication protocols and network role
- Form factor and mounting (DIN rail, panel, rack)
- Operating temperature, humidity, vibration, IP rating
- Certifications (UL, CE, ATEX, marine, etc.)
- Compatible firmware and engineering software revisions
We can also supply OEM datasheets and wiring diagrams on request.
More from this series
Compatible series
Browse this product type
Frequently asked questions
What does the CNC Mainboards (A03B) series include?
The CNC Mainboards (A03B) series is part of the CNC Systems family from Fanuc. It groups related catalog numbers that share form factor, I/O type and communication protocol — making it easy to find drop-in replacements.
Is CNC Mainboards (A03B) compatible with newer Fanuc hardware?
In most cases yes. CNC Mainboards (A03B) units interoperate with current Fanuc programming software and communication backbones. Contact us with your firmware revision and we will confirm before shipping.
Can I get CNC Mainboards (A03B) parts refurbished with warranty?
Yes. We offer refurbished CNC Mainboards (A03B) modules tested to OEM specs with a 1-year replacement warranty. New surplus stock is also available when supply permits.
Machine down? Get a fast quote on the parts you need.
New, surplus, and refurbished industrial automation options. Request a quote or speak directly with an automation specialist for emergency sourcing.







