FIELD GUIDESource-led reference

E023 · Contact designations

RCA connector engineering reference

Neutrik NF2C-B/2 assembly example and Denon AVR-1507 application examples are kept separate. Two interface paths are not a count of socket solder legs.

Source checked · no independent review claimed · Fabrication approved: no

RCA connector — original, not-to-scale identification schematic; drawing review pending
View Cable-end plug exterior; qualitative side profileDepiction Cable-end plugOriginal source-linked study · not to scale · independent review pending
Identification schematic only · not to scale · drawing review pending. No engineering drawing is published for this profile.

Orientation

How to read this profile

Descriptive concentric-contact labels only: center versus surrounding contact. No numeric pin order, PCB terminal mapping or switched-contact numbering is assigned.

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts2S395 · S396 · S396 · S397Center and surrounding contacts of a coaxial phono plug; NF2C-B/2 example; nominal engineering count, not automatically positions, population or a device wiring map. Center and surrounding contacts of a coaxial phono plug; NF2C-B/2 example
Connector roleplug; plug (NF2C-B/2)S395 · S396 · S396 · S397 · S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. Center and surrounding contacts of a coaxial phono plug; NF2C-B/2 example NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.
Coupling / latchGround makes before signal; signal breaks before ground (NF2C-B/2)S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.
ManufacturerNeutrik (NF2C-B/2)S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.
SeriesProfi (NF2C-B/2)S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.
Exact part / implementationNF2C-B/2 (NF2C-B/2)S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.
Recorded markingsManufacturer supplies pair marked red and black (NF2C-B/2)S397Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NF2C-B/2. Documented role: plug. Marking colors identify this supplied pair and do not establish circuit function for everyRCAjack.; Sourcecontact resistance text>10GmOhm appears malformed; not adopted.

Not recorded: Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Contact gender / arrangement, Mounting, Keying / polarization, Shell / form, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits
  • Color alone does not establish analog audio, coaxial digital audio, composite video or component video.
  • No impedance, supported frequency, cable length, signal voltage or connector tolerance is inferred for an unspecified cable or socket.
  • Switched sockets and multiway assemblies may have additional terminals not represented by the two interface paths.
  • Ground-before-signal contact sequencing belongs to the cited NF2C-B/2 design, not every RCA connector. No fabrication or live-connection approval.
Report a correction to these facts →

Contact designations

Contact reference

Source-scoped contact assignments; read the orientation and evidence before using numbers
ContactDocumented role / designationEvidence
Center contactCenter-conductor path; actual signal is application-specific[C023B]
Surrounding contactShield/return path in the cited phono example[C023B]

Unknowns stay unknown.

  • Color alone does not establish analog audio, coaxial digital audio, composite video or component video.
  • No impedance, supported frequency, cable length, signal voltage or connector tolerance is inferred for an unspecified cable or socket.
  • Switched sockets and multiway assemblies may have additional terminals not represented by the two interface paths.
  • Ground-before-signal contact sequencing belongs to the cited NF2C-B/2 design, not every RCA connector. No fabrication or live-connection approval.

Your next step

Use the detail without guessing past its limits.

Source trail

Claims and sources

Back to first citation ↑
C023Bsource checked

Neutrik NF2C-B/2 assembly instruction BDA 236 V3 shows a center-conductor path and a separate cable-shield path terminating in the concentric phono plug contacts. This reference counts two conducting paths, not component solder lugs or switched-socket terminals.

Neutrik AG · NF2C-B/2 Profi phono plug — Assembly Instruction BDA 236 V3, 2023-01-25 ↗
Single page; illustrations B, C and F show the separate center-conductor and shield paths and assembled concentric contacts. · No universal solder-lug numbering, switch-contact arrangement, mechanical tolerance, cable rating or fabrication procedure is inferred from this component example.

C023Csource checked

Denon AVR-1507 page 10 distinguishes RCA-style pin-plug uses: white/left and red/right analog audio, a separate mono subwoofer connection, orange coaxial digital audio, yellow composite video, and green Y / blue PB-CB / red PR-CR component video.

Denon · Denon AVR-1507 Owner’s Manual — Cable indications ↗
Printed page 10 (PDF page 13), Cable indications: groups A, B, C, F and H and signal-direction legend. · The table is a receiver-manual example, not a guarantee that color identifies an unknown socket. It does not establish an arbitrary cable’s impedance, waveform or replacement suitability.

C023Dsource checked

The Denon AVR-1507 cable table specifies 75-ohm pin-plug cables separately for coaxial digital audio and composite video. A shared impedance description and RCA form do not make their signals the same.

Denon · Denon AVR-1507 Owner’s Manual — Cable indications ↗
Printed page 10 (PDF page 13), Cable indications: groups A, B, C, F and H and signal-direction legend. · The table is a receiver-manual example, not a guarantee that color identifies an unknown socket. It does not establish an arbitrary cable’s impedance, waveform or replacement suitability.

C023Esource checked

Neutrik describes the NF2C-B/2 as making its ground contact before its signal contact, and breaking signal before ground. The manufacturer also uses phono, RCA and CINCH as names for this plug type.

Neutrik AG · NF2C-B/2 Profi phono plug — manufacturer product description ↗
Product description and Features & Benefits: phono/RCA/CINCH naming and ground-before-signal contact sequence. · The ground-first feature is specific to this design and is not generalized to all RCA plugs. Electrical-rating fields elsewhere on the page are not used here.

3 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

3 linked sources · 4 scoped claims · 0 sources with inspection/access flags.

Page scope: No new drawing. Existing unnumbered identification artwork is unchanged and must not be used as a numbered mating-face or fabrication drawing.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-05. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 3 source scopes, access limits and dates

S395 · NF2C-B/2 Profi phono plug — Assembly Instruction BDA 236 V3, 2023-01-25

Neutrik AG · Manufacturer / product-owner domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: Exact NF2C-B/2 RCA example; two conducting paths, not two numbered PCB terminals.

Not established / limitations: No universal solder-lug numbering, switch-contact arrangement, mechanical tolerance, cable rating or fabrication procedure is inferred from this component example.

Locator: Single page; illustrations B, C and F show the separate center-conductor and shield paths and assembled concentric contacts.

S396 · Denon AVR-1507 Owner’s Manual — Cable indications

Denon · Unclassified publisher domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: Named-manual examples of pin-plug audio/video uses, color conventions, and 75-ohm cable descriptions for coaxial digital audio and composite video.

Not established / limitations: The table is a receiver-manual example, not a guarantee that color identifies an unknown socket. It does not establish an arbitrary cable’s impedance, waveform or replacement suitability.

Locator: Printed page 10 (PDF page 13), Cable indications: groups A, B, C, F and H and signal-direction legend.

S397 · NF2C-B/2 Profi phono plug — manufacturer product description

Neutrik AG · Manufacturer / product-owner domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: Exact NF2C-B/2 contact sequencing; naming context only.

Not established / limitations: The ground-first feature is specific to this design and is not generalized to all RCA plugs. Electrical-rating fields elsewhere on the page are not used here.

Locator: Product description and Features & Benefits: phono/RCA/CINCH naming and ground-before-signal contact sequence.

Trace 4 claims to their source records

C023B · P023

Neutrik NF2C-B/2 assembly instruction BDA 236 V3 shows a center-conductor path and a separate cable-shield path terminating in the concentric phono plug contacts. This reference counts two conducting paths, not component solder lugs or switched-socket terminals.

Claim scope: Exact component illustration used for center/surrounding-contact identification; no universal terminal numbering or audio/video signal assignment.

Source links: S395 · Evidence trail → (private workspace)

C023C · P023

Denon AVR-1507 page 10 distinguishes RCA-style pin-plug uses: white/left and red/right analog audio, a separate mono subwoofer connection, orange coaxial digital audio, yellow composite video, and green Y / blue PB-CB / red PR-CR component video.

Claim scope: Named-manual color and label examples, not a universal color guarantee. A red connector is not necessarily an audio channel; direction and signal type require device labels.

Source links: S396 · Evidence trail → (private workspace)

C023D · P023

The Denon AVR-1507 cable table specifies 75-ohm pin-plug cables separately for coaxial digital audio and composite video. A shared impedance description and RCA form do not make their signals the same.

Claim scope: Exact manual cable descriptions only; no inferred impedance, length limit, bandwidth or electrical approval for an unidentified RCA-ended cable.

Source links: S396 · Evidence trail → (private workspace)

C023E · P023

Neutrik describes the NF2C-B/2 as making its ground contact before its signal contact, and breaking signal before ground. The manufacturer also uses phono, RCA and CINCH as names for this plug type.

Claim scope: Exact product design and naming only; not a universal RCA contact sequence, safety guarantee or evidence that a socket is a turntable PHONO input.

Source links: S397 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.