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NC3FAH2 Part Review

Date: 2026-07-17

Sources checked

Current Flux project: silicon-yard/nc3fah-2
Current project Datasheet URL property: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/e5cf95e5433f4cab7a15b1174c9cc7458287c19b1a687f35a77e79d19f258f4b.pdf
Official Neutrik product page found during review: https://www.neutrik.com/en/product/nc3fah2
Official Neutrik PDF found during review: https://www.neutrik.com/en/product/nc3fah2.pdf
KiCad reference footprint checked: Jack_XLR_Neutrik_NC3FAH2_Horizontal

Existing part information in Flux

Table

Field	Current value	Datasheet / official value	Review
Project / part name	NC3FAH-2	NC3FAH2	Mismatch: official Neutrik product title uses `NC3FAH2` without the hyphen.
Manufacturer Part Number	NC3FAH-2	NC3FAH2	Mismatch / alias risk. Recommended primary MPN is `NC3FAH2`.
Manufacturer Name	Neutrik	Neutrik	Matches.
Description	Connector, PCB; Receptacle; 3 to 5	3 pole female XLR receptacle, separate shell/front-panel ground, horizontal PCB mount	Current description is too generic and ambiguous.
Part Type	Connectors	Connector / XLR connector	Mostly correct category, but should ideally be singular `Connector` and include XLR details.
Package or Case Code	TO	XLR receptacle, A-series, horizontal PCB through-hole	Mismatch: `TO` is not appropriate for this connector.
Mount	PCB	Horizontal PCB mount / through-hole	Mostly correct but should be more specific.
Datasheet URL	Google-storage PDF already set	Official Neutrik PDF also found	Existing URL was present, so no Datasheet URL update was required by the request. Official direct PDF is listed above.
Pads / terminals	6	4 electrical terminals plus 2 mechanical NPTH holes	Likely mismatch: mechanical holes appear promoted to electrical pads/terminals.

Key official specifications

Table

Spec	Value
Product	NC3FAH2
Manufacturer	Neutrik
Connector type	3-pole female XLR receptacle
Grounding	Separate ground contact to mating connector shell and front panel; no connection to Pin 1
Wiring / mount	Horizontal PCB mount, rear mounting, A-screw, A-series chassis shape
Rated current	6 A per contact
Rated voltage	10 GΩ initial
Insertion / withdrawal force	1000 mating cycles
Contacts	Bronze CuSn6, hard gold contact areas
Insert	Polyamide PA 6.6
Protection class	IP40
Temperature range	-30 °C to +80 °C
Flammability	UL 94 V-0
Standard	IEC 61076-2-103

Symbol / terminal review

Current schematic terminals:

Table

Terminal shown	Pin Number property	Pin Type	Pin Description	Review
1	1	Unspecified	Missing	Should be passive; description: XLR contact 1.
2	2	Unspecified	Missing	Should be passive; description: XLR contact 2.
3	3	Unspecified	Missing	Should be passive; description: XLR contact 3.
G	4	Unspecified	Missing	Should be named/described as shell/front-panel ground, separate from Pin 1. If possible, pin number should be `G`, not numeric `4`.
5	5	Unspecified	Missing	Likely should not be a schematic terminal; appears to correspond to a mechanical hole.
6	6	Unspecified	Missing	Likely should not be a schematic terminal; appears to correspond to a mechanical hole.

Recommended logical terminals: 1, 2, 3, and G only. The two mechanical support holes should not be nettable schematic pins unless the manufacturer drawing explicitly identifies them as plated/electrical contacts.

Footprint review

Current footprint asset pad list from imported KiCad payload:

Table

Current pad	At (mm)	Size (mm)	Drill (mm)	Review
1	(0.000, 0.000)	2.4 x 2.4	1.6	Electrical pad; annular ring smaller than KiCad reference.
2	(7.620, 0.635)	2.4 x 2.4	1.6	Electrical pad; coordinates look like a rotated reference footprint.
3	(3.810, 4.450)	1.8 x 1.8	1.2	Electrical pad; annular ring smaller than KiCad reference.
4 / G	(-3.810, -5.720)	1.8 x 1.8	1.2	Shell/front-panel ground should be named `G`; numeric pad 4 is semantically risky.
5	(7.620, -4.450)	2.4 x 2.4	1.6	Likely should be NPTH mechanical hole, not copper/nettable pad.
6	(0.000, -8.890)	2.4 x 2.4	1.6	Likely should be NPTH mechanical hole, not copper/nettable pad.

KiCad reference footprint for Neutrik NC3FAH2 models the part as four nettable pads plus two NPTH holes:

Table

Reference feature	At (mm)	Size (mm)	Drill (mm)
Pad 1	(0, 0)	3.4 x 3.4	1.6
Pad 2	(-0.635, 7.62)	3.4 x 3.4	1.6
Pad 3	(-4.45, 3.81)	2.9 x 2.9	1.2
Pad G	(5.72, -4.44)	2.9 x 2.9	1.2
NPTH	(3.81, 7.62)	1.6 x 1.6	1.6
NPTH	(8.89, 0)	1.6 x 1.6	1.6

The current Flux footprint appears to be a rotated variant, which is not necessarily wrong, but the mechanical holes becoming pads 5 and 6 is a likely functional/library issue. Pad copper sizes are also smaller than the KiCad reference, reducing annular ring and mechanical robustness for a connector.

Mismatches / issues flagged

Official MPN appears to be NC3FAH2, while the part uses NC3FAH-2.
Package or Case Code = TO is inappropriate for this XLR connector.
Description is too generic and does not capture 3-pole female XLR, horizontal PCB mount, and separate shell/front-panel ground.
Symbol exposes six terminals; likely correct electrical terminals are 1, 2, 3, and G only.
Terminals 5 and 6 likely represent mechanical NPTH holes and should not be nettable schematic terminals.
G is modeled with Pin Number 4; the official/reference naming uses G for the separate shell/front-panel ground contact.
All terminal Pin Type fields are Unspecified; connector pins should normally be Passive, with G described as shell/chassis/front-panel ground.
Pin descriptions are missing for all terminals.
Footprint pads 5 and 6 likely should be NPTH mechanical holes, not copper pads.
Pad copper sizes are smaller than the KiCad reference footprint and should be verified for annular ring / mechanical stress robustness.

Actions taken

Confirmed a Datasheet URL was already present, so no Datasheet URL update was required by the request.
Found the official Neutrik product page and direct PDF URL.
Cross-checked metadata, symbol terminals, terminal descriptions, and footprint against official Neutrik information and KiCad reference footprint.
Filed an internal Flux part-quality report for the suspected symbol/footprint/metadata problems.

Suggested remediation

Update metadata to use official MPN NC3FAH2 and a connector-specific package/case value.
Revise the symbol to expose 1, 2, 3, and G only.
Add pin descriptions and set pin type to Passive or equivalent.
Convert the two mechanical support holes to NPTH/non-nettable footprint features.
Rename/map the shell/front-panel ground pad as G rather than numeric 4 if supported.
Verify pad sizes against the official Neutrik drawing and/or use the KiCad reference annular ring sizes if appropriate for manufacturing robustness.

Sources checked
Existing part information in Flux
Key official specifications
Symbol / terminal review
Footprint review
Mismatches / issues flagged
Actions taken
Suggested remediation

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