Identify first
Read the part and the device.
Read the exact bill-of-materials role. A cage with light pipes or a heatsink is still not evidence of a complete optical module.
P202 / Pluggable I/O / Connector
QSFP-DD host connector / cage form
QSFP-DD is a distinct double-density pluggable-I/O host form within the QSFP family.
Also called QSFP-DD double density QSFP QSFP DD
A QSFP-DD cage outline is not a guarantee that any given module, link rate or breakout mode is supported.
Look for
Confirm the exact host cage, module standard, firmware/vendor support and media before treating a module as compatible.
Claim inspection dates: 2026-10-05, 2026-10-11, 2026-10-22 · Independent review pending
View Not declared in this illustrationDepiction Plug/receptacle role not specifiedNot to scale · independent drawing review pending
Original recognition schematic · not to scale · drawing review pendingNetwork notes / Pluggable hosts / P202
Does the listed QSFP-DD cage include a working optical transceiver?
The cited V36-BAZ17-205E11A is a 2x1 long cage assembly with light pipes and a heatsink, intended for an anchor-pin SMT connector. That component description does not establish an included optical transceiver, compatible switch or operating network link.
Still unresolved
Keep this requirement open.
Host acceptance, QSFP/QSFP-DD cross-generation support, module power and thermal approval, and network-facing optics remain unknown.
Documented support · named example only
Is V36-BAZ17-205E11A documented as a cage assembly?
Yes; the product is a 2x1 long cage with specified light-pipe and heatsink features.
Boundary. The listing is not proof of an included transceiver or a supported complete host assembly.
Next check. Confirm every required component and the host/module support documentation.
S509 · C202C (private workspace)
Before choosing the cable or component
- Confirm whether the required item is a cage, PCB connector, module or cable assembly.
- Read exact host/module support documents rather than assuming backward compatibility.
- Qualify the network-facing optic, cable and peer separately.
Read the evidence and its scope · 2 observations
C202A (private workspace) — Amphenol identifies the cited ExtremePort product as a QSFP-DD host connector/cage form.
V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.
C202C (private workspace) — Amphenol identifies V36-BAZ17-205E11A as a QSFP-DD 2x1 long cage assembly for an anchor-pin SMT connector, with light pipes and a heatsink. The cited part is not a complete optical transceiver or proof of host support.
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.
Signal-path fieldbook
Before a cable or module is ordered.
Read the answer, keep mechanical fit separate from the signal path, and verify the named endpoint. These editorial studies reuse inherited source records; no compatibility has been laboratory confirmed.
V106N02 / pluggable networkDevice qualification required
A module says QSFP-DD. Can I order it for a QSFP+ switch port?
Field answerDo not choose the optic from a shared QSFP name. Amphenol identifies QSFP+ as a 38-position host interface and a separate QSFP-DD cage family. Neither source alone establishes a permitted module insertion, break-out mode, electrical interface or transceiver approval on your switch.
Four checks that must stay separate
| Evidence layer | What is established or still conditional |
|---|---|
| Cage versus module | QSFP+ and QSFP-DD are separately named host connector/cage product lines, not generic interchangeable ports. |
| Host signal capability | QSFP family branding does not tell you a specific switch’s supported interface mode, number of active lanes or operating firmware. |
| Cable / optical assembly | Direct-attach, optical and break-out configurations need an explicit host-module-and-peer compatibility statement. |
| Manufacturer scope | S204 is an ExpressPort QSFP+ series; S205 identifies Amphenol cage part V36-BAZ17-205E11A as QSFP-DD, not as a switch approval. |
Check next, in this order
- Read the exact host port form, supported transceiver list and approved break-out configurations.
- Compare the full module or cable assembly model with the device vendor’s compatibility statement.
- Verify peer endpoint mode, optical/fiber or copper medium and thermal/power qualification for this port.
Not yet established These connector manufacturer pages cannot decide actual mechanical acceptance, switch software support, active lane mapping or compatibility of an unspecified QSFP-DD module in a QSFP+ host.
Read the claim and manufacturer source boundaries
Existing scoped claims: C201A (V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.); C202A (V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.). No newly authored empirical specifications; manufacturer catalogue claims remain conditional on the actual part and host.
- S204 · Amphenol Communications SolutionsQSFP series overview; inherited review 2026-10-05. Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.
- S205 · Amphenol Communications SolutionsQSFP-DD product identification; inherited review 2026-10-05. Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.
Existing inspection dates remain unchanged. This editorial synthesis is not a physical mating test, pinout, optical budget, manufacturer device approval or deployment authorization.
The useful distinction
Recognize it. Then verify it.
QSFP-DD is a distinct double-density pluggable-I/O host form within the QSFP family. [C202A]
Amphenol identifies V36-BAZ17-205E11A as a QSFP-DD 2x1 long cage assembly for an anchor-pin SMT connector, with light pipes and a heatsink. The cited part is not a complete optical transceiver or proof of host support. [C202C]
Molex2027180103 lists76loadedcircuits, manufacturer NumberOfRows1,0.80mm mating pitch, right-angle surface mounting, copper-alloy contacts and high-temperature thermoplastic housing. The one-row property belongs to this connector, separate from cage port counts. [C202W]
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 | 76S205 · S219QSFP-DD host receptacle; nominal engineering count, not automatically positions, population or a device wiring map. QSFP-DD host receptacle |
|---|---|
| Contact rows | 1 (Molex2027180103)S219Qualified exact source facts only; counterpart, mounting-acceptance, cable, port, termination and assembly context remains separately labelled in variant_notes. Exact Molex2027180103 QSFP-DD host connector; manufacturer row metadata only, not the2x1 Amphenol cage/port matrix or a reconstructed face layout. Quantity context: Manufacturer Number Of Rows property. |
| Contact pitch | 0.8 mm Example mating-interface pitch (Recorded example component); 0.8 mm mating interface (2027180103)S219 · S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. example_component; QSFP-DD host receptacle 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
| Connector role | socket; socket (2027180103)S205 · S219 · S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. QSFP-DD host receptacle 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
| Mounting | surface-mount (Claim C202C)S509Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee. |
| Keying / polarization | Polarized to mating part and PCB; keying and mating lock:no per catalog (2027180103)S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
| Manufacturer | Molex (2027180103)S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
| Series | 202718 (2027180103)S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
| Exact part / implementation | 2027180103 (2027180103)S219Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2027180103. Documented role: socket. Manufacturer page lists1row for exact part, while existing form representation uses2rows. Do not overwrite row semantics without drawing comparison.; 76loaded circuits; right-angle SMT. |
Not recorded: Positions / cavity span, Populated contacts, Dimensions / axis, Contact gender / arrangement, Coupling / latch, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.
Recorded variant and source limits
- The 0.80 mm pitch is an example-component fact, not a universal fabrication envelope.
- No 76-pad lane/control/power mapping is published in this profile.
- QSFP-DD generation and lane capability are not inferred from the connector form alone.
- Retained rows context (excluded from normalized contact/body field): 2. V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee. Sources: S509: Part title and product description: 2x1 long cage for anchor-pin SMT connector, light pipes and heatsink
Bounded facts, visible unknowns
Specifications and limits
| Documented identification | QSFP-DD form-factor identification only; no performance claim. [C202A] |
|---|---|
| Mechanical dimensions | No independently reviewed mechanical drawing in V36; 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.
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 ↑
C202ASource checked · pending review
Amphenol identifies the cited ExtremePort product as a QSFP-DD host connector/cage form.
Amphenol Communications Solutions · ExtremePort QSFP-DD 112G product ↗S205: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
C202CSource checked · pending review
Amphenol identifies V36-BAZ17-205E11A as a QSFP-DD 2x1 long cage assembly for an anchor-pin SMT connector, with light pipes and a heatsink. The cited part is not a complete optical transceiver or proof of host support.
Amphenol Communications Solutions · Amphenol V36-BAZ17-205E11A — specific QSFP-DD cage assembly ↗S509: full source recordInspect review dependencies → (private workspace)Back to first citation ↑
Suggest a correction to this field note →C202WSource checked · pending review
Molex2027180103 lists76loadedcircuits, manufacturer NumberOfRows1,0.80mm mating pitch, right-angle surface mounting, copper-alloy contacts and high-temperature thermoplastic housing. The one-row property belongs to this connector, separate from cage port counts.
Molex · 2027180103 QSFP-DD 76-circuit host connector ↗S219: full source recordInspect review dependencies → (private workspace)Follow the connection
Related field notes
Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Pluggable I/O Connector
SFP / SFP+ / SFP28 host connector form
The same physical module family can carry different electrical/optical standards; form factor alone does not establish link capability.
Open field note
Pluggable I/O Connector
QSFP+ host connector form
A QSFP-family cage does not by itself establish Ethernet generation, optics, copper reach or module support.
Open field note
Fiber Connector
LC fiber connector
Confirm the connector family and the optical end-face variant.
Open field notePut this field note to work.
Add to discovery trayRecord an unsaved candidate (private workspace)
Compare look-alikes: SFP versus QSFP-family pluggable I/O · OSFP versus QSFP-DD host forms
Candidate selection does not confirm the identity or capabilities of your physical item.