Identify first
Read the part and the device.
Read coding, intended service and full part numbers. Four positions and the M8 family name are not enough to identify a compatible mating pair.
P250 / Network / Connector
M8 D-coded Ethernet connector
M8 D-coded provides a compact four-position industrial data form documented for PROFINET/Ethernet use.
Also called M8 D-coded M8 D code 4-pin M8 Ethernet M8 PROFINET
M8 D-coding is a specific keyed data form; it should not be confused with same-shell A-coded M8 connectors.
Look for
Read the coding and confirm the four-position D-coded insert rather than identifying the connector from the M8 threaded shell alone.
Claim inspection dates: 2026-10-06, 2026-10-15 · Independent review pending
Three-quarter view Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Mating face Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Fitted in place Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Recognition drawing Original schematic, not to scale. Drawing review pending.
Network notes / Industrial / P250
Can four positions make an M8 A and M8 D connector interchangeable?
No interchangeability follows from the shared position count. The retained Phoenix 1323169 observation identifies a four-position D-coded PROFINET/CAT5 example; the A-coded 1453481 is a separately documented device connector. A fresh retrieval of 1323169 was unavailable in this release.
Still unresolved
Keep this requirement open.
The current 1323169 page could not be refreshed; no new physical view, current rating or cross-coding compatibility is claimed.
Not established · named example only
Can the four-position M8 A and M8 D examples be substituted?
No substitution is established by the cited family observations.
Boundary. The 1323169 page could not be refreshed; shared position count is not mating evidence.
Next check. Acquire exact current coding and mating-part documentation.
S270 · S502 · C250A (private workspace) · C249C (private workspace)
Before choosing the cable or component
- Find the original equipment’s complete coded connector designation.
- Acquire the exact current mating-component documentation before purchase.
- Keep wiring, power and protocol support unresolved until that evidence is available.
Read the evidence and its scope · 2 observations
C250A (private workspace) — Phoenix Contact identifies part 1323169 as a four-position, D-coded M8 data connector for PROFINET CAT5.
V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.
C249C (private workspace) — Phoenix Contact 1453481 is a straight four-position A-coded M8 male device connector for rear mounting, with individual leads; the product listing calls it unshielded. It is not described as a ready-made Ethernet patch cable.
V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee.
Source interpretation is not independent engineering review, hardware testing, wiring advice or a public-release approval.
The useful distinction
Recognize it. Then verify it.
M8 D-coded provides a compact four-position industrial data form documented for PROFINET/Ethernet use. [C250A]
HARTING identifies a four-contact M8 D-coded PCB adapter, with listed 10/100 Mbit/s data use. Sharing the D coding with an M12 product does not make the two differently sized connectors a mating pair. [C250C]
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.
| Nominal contacts | 4S270Source-backed nominal position/contact count: 4. |
|---|---|
| Positions / cavity span | 4 (Claim C250A); 4 (Claim C250B); 4 (HARTING 21 02 381 2419)S270 · S289 · S650Source-scoped examples are separate; select the exact variant and measured axis. V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. V44 interface-assignment reference for the documented M8 D-coded PROFINET form; not a guarantee for arbitrary Ethernet equipment or cabling. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Connector role | Straight female M8 PCB connector; housing ordered separately (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Contact gender / arrangement | female (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Mounting | Reflow soldering termination (THR) (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Keying / polarization | D coding (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Shell / form | shielded (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Manufacturer | HARTING (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Series | Circular connectors M8 (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
| Exact part / implementation | HARTING 21 02 381 2419 (HARTING 21 02 381 2419)S650Source-scoped examples are separate; select the exact variant and measured axis. HARTING 21 02 381 2419. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use. |
Not recorded: Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Coupling / latch, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.
Recorded variant and source limits
- This assignment does not prove that an arbitrary M8 D-coded port or cable supports a particular Ethernet speed or device role.
- No fabrication dimensions, cable category verification or installed-link performance is established.
- Phoenix Contact M8 D-coded PROFINET: Phoenix catalog p.44 separate male/female PROFINET D-coded drawings. Key notch up: female has 1 upper left,2 upper right,3 lower right,4 lower left; male is mirrored as drawn. No termination-side convention inferred.
- Phoenix Contact M8 4-position D-coded PROFINET assignment: Numbered contacts of Phoenix Contact 4-position D-coded PROFINET interface. Female and male figures are distinct on p. 44; no spatial side assumed.
Bounded facts, visible unknowns
Specifications and limits
| Documented identification | 4-position/contact recognition fact in the cited implementation. [C250A] |
|---|---|
| Mechanical dimensions | No independently reviewed mechanical drawing in V43; do not use this page for fabrication, fit testing or tolerance work. |
| Engineering pinout | Source-checked engineering profile available; independent review pending. Open engineering profile → |
| Verified device list | Not included. Check exact device and accessory documentation. |
A boundary, not an omission to guess around.
Use the source-backed form or position count only for identification. Resolve ratings, protocol, direction, wiring, cable construction and exact device support from the relevant equipment and component documentation.
Before you connect
What to check
- Identify the exact connector family and variant from the equipment or cable documentation.
- Keep shape, contact count, protocol, electrical rating and device support as separate facts.
- Do not force, rewire or adapt a connector from this recognition record; resolve the remaining requirements first.
Pins & wiring
Pinout
Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.
What the status labels mean
- Confirmed
- Recorded research passes agree within this variant; this is not independent human review or hardware validation.
- Single source
- Only one underlying document, or one pass, supports this assignment.
- Device-specific
- Supported for the named equipment or wiring only. Check your device’s manual.
- Unverified
- Missing or conflicting evidence. Do not wire from this row.
- Not connected
- The source explicitly says NC, no contact or no pin for this wiring.
What is not established
This field note does not approve a connection, adapter, cable assembly, rewiring scheme or fabricated part. It intentionally omits unsupported pin assignments and mechanical tolerances.
Your next step
Move from the form to the requirement.
The source trail
Evidence for this page
AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.
Back to first citation ↑
C250ASource checked · pending review
Phoenix Contact identifies part 1323169 as a four-position, D-coded M8 data connector for PROFINET CAT5.
Phoenix Contact · M8 D-coded PROFINET data connector ↗S270: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
Suggest a correction to this field note →C250CSource checked · pending review
HARTING identifies a four-contact M8 D-coded PCB adapter, with listed 10/100 Mbit/s data use. Sharing the D coding with an M12 product does not make the two differently sized connectors a mating pair.
HARTING Technology Group · HARTING circular connector coding and application distinctions ↗S647: full source recordHARTING Technology Group · HARTING M8 D-coded four-contact PCB connector, article 21 02 381 2419 ↗S650: full source recordInspect review dependencies → (private workspace)Follow the connection
Related field notes
Network Connector
M8 A-coded 4-position connector
The M8 threaded shell does not identify coding or function. A- and D-coded inserts are separate keyed forms.
Open field note
Network Connector
M12 D-coded Ethernet connector
An M12 shell does not identify the coding; D-coded and X-coded Ethernet interfaces are different keyed forms.
Open field note
Network Connector
M12 X-coded Ethernet connector
M12 X-coded and D-coded forms differ in coding and position layout even though both use an M12 shell.
Open field notePut this field note to work.
Add to discovery trayRecord an unsaved candidate (private workspace)
Compare look-alikes: M8 A-coded versus D-coded · M8 D-coded versus M12 D-coded
Candidate selection does not confirm the identity or capabilities of your physical item.
NETWORK & INDUSTRIAL / COMPONENT → VARIANT → SERVICE
Name the part. Then the connection.
Compare source-observed component roles, keep exact mating exclusions visible, and distinguish connector identity from equipment service and protection conditions.
Read the network component reference →Industrial coding field check · M8 D · smaller data
Can an M8 D-coded Ethernet plug mate with an M12 D-coded port?
Short answer No. Sharing D coding describes an application and coding pattern, not a shared M8/M12 connector size.
Verify next
Check both devices for M8 or M12 shell size and their exact designated mating cable part.
Not yet established
This does not identify a safe adapter, wiring map or manufacturer-approved cross-size assembly.
Show source-checked observations (not independently approved)
- C250C — HARTING identifies a four-contact M8 D-coded PCB adapter, with listed 10/100 Mbit/s data use. Sharing the D coding with an M12 product does not make the two differently sized connectors a mating pair. S647 · HARTING Technology Group · S650 · HARTING Technology Group
Symbolic reference, not connector gauging, manufacturing dimensions, wiring, approved mating, hardware test or publication approval.