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Card Edge Connector
Industrial, IT Datacom
At 16 GT/s per lane, PCIe Gen4 pushes signal margins to the point where the connector itself becomes a critical signal integrity component — not just a mechanical bridge. The CONSHARE PCIe Gen4 64-position SMT connector addresses this with an integrated ground plate, 15-microinch gold contact plating, and a side-cutout body designed for clean SMT placement. It ships in tape & reel packaging with a protective cap, ready for high-volume automated assembly.
Gen4 signaling doesn't give you the margin that Gen3 did. Lane rates doubled to 16 GT/s, which means the eye window shrinks, jitter budgets tighten, and any discontinuity in the signal path — including the connector — shows up as link training failures or degraded BER in the field.
The connector sits between your PHY and whatever you're connecting to, and at Gen4 frequencies, it's not enough for contacts to simply touch. You need controlled impedance through the contact region, a low-inductance ground return path, and contact surfaces that maintain stable resistance across hundreds of mating cycles. Miss any of these and you'll spend weeks in the lab chasing intermittent link failures that don't show up in simulation.
This is why the 64-position layout matters beyond pin count. The contact arrangement and ground structure around it determine whether adjacent lanes couple destructively. With 64 positions handling differential pairs at Gen4 speeds, crosstalk between neighboring contacts can eat 20–30% of your eye margin if the ground architecture isn't designed correctly.
Fifteen microinches of gold on the contact area puts this connector in the production-grade plating tier, not the budget category. Here's why that thickness matters:
Plating Tier | Thickness | Typical Mating Cycles | Field Failure Mode |
|---|---|---|---|
Economy | 3–5μ" Au | 25–50 cycles | Gold wears through, nickel oxidizes, intermittent opens |
Production-grade (this connector) | 15μ" Au | 200+ cycles | Minimal wear, stable contact resistance over product life |
Test-grade | 30μ" Au | 500+ cycles | Diminishing returns vs. unit cost |
At 3–5μ", the gold layer wears through after a handful of mating cycles, exposing nickel underneath. Nickel oxide forms slowly — you won't catch it in production test. It surfaces as field returns months later. At 15μ", the gold survives the full lifecycle of a production board: initial assembly, testing, rework cycles, and field service.
The ground plate is a continuous metal structure bonded to the connector body, separate from the signal contacts. It serves three functions that directly affect your design:
Return path for high-speed pairs — Gen4 differential signals need a low-impedance return path. The ground plate provides one that's consistent across all 64 positions, rather than relying on board-level copper pours that vary with layout density.
EMI containment — Radiated emissions from Gen4 lane switching are a real compliance challenge. The plate acts as a partial shield between the connector region and adjacent board components, giving you margin during FCC and CISPR testing.
Mechanical reinforcement — The plate adds rigidity to the SMT solder joints, distributing mechanical stress across a wider solder area during thermal cycling. Board flex in large motherboards can crack SMT joints over temperature swings; the ground plate mitigates this.
The side cutout in the connector body isn't visible in a product photo, but it changes how the connector behaves during pick-and-place and reflow:
Provides nozzle access for vacuum pickup without contacting the contact area
Allows AOI cameras to view rear solder fillets — where most SMT connector defects hide
Reduces solder paste displacement during placement by giving the body a controlled seating surface
For contract manufacturers running high-mix lines, this means fewer placement errors and faster changeovers between product runs.
The connector ships in tape & reel format with a protective cap covering the contact interface. This packaging choice affects three things on your production floor:
Reel handling: Components arrive oriented and indexed, ready for automated pick-and-place without manual sorting. Standard reel quantities match common feeder capacities on major placement equipment.
Cap function: The cap stays on through reflow, protecting contacts from flux residue and process contamination. It's rated to 260°C peak — compatible with standard SAC305 reflow profiles. Remove it before the first mating cycle.
Shelf and transit: Sealed tape & reel with cap in place prevents contact oxidation during storage. For buyers stocking connectors for phased production runs, this means you can hold inventory without worrying about contact degradation over months of shelf time.
Every production lot passes through five verification stages before shipment:
Stage | What's Checked | Why It Matters to You |
|---|---|---|
Incoming material | Copper alloy composition, plating chemistry | Consistent material properties lot to lot |
In-process dimensional | Contact pitch, coplanarity, ground plate flatness | Prevents tombstoning, ensures mating alignment |
Plating thickness (XRF) | Gold thickness verified at 15μ" nominal per lot | Contact reliability traceable to measurement data |
Electrical test | Contact resistance, insulation resistance | Catches latent defects before they reach your line |
Packaging audit | Component orientation, reel count, cap placement | Fewer line-side surprises when you open the reel |
Standard configuration (15μ" Au, tape & reel, with cap): 3–4 weeks from PO confirmation
Custom plating (30μ" Au selective gold): 5–6 weeks with plating line changeover
Custom reel quantities and dry-pack: Available with minimal setup time
Cap color coding for lot/batch identification: Supported for customers needing visual traceability on the assembly line
Land pattern: Follow the recommended PCB footprint exactly. The ground plate solder pads are sized for thermal relief — over-sizing them invites tombstoning during reflow.
Stencil design: A 0.12mm stencil with step-down on the ground plate pads balances solder volume between fine-pitch signal pins and the larger ground area.
Reflow profile: Standard SAC305 works. The cap and connector body are rated for 260°C peak — no special low-temperature profile needed.
Post-reflow inspection: The side cutout gives AOI equipment a better viewing angle on rear solder fillets. Focus your inspection there — it's where most SMT connector defects live.
Server and workstation motherboards with constrained PCIe slot layouts
Network interface cards requiring Gen4 backplane connectivity
Industrial computing platforms with field-replaceable PCIe modules
Data center acceleration cards where signal margin is tight and rework is expensive
The contact system and ground plate provide signal integrity margin that extends beyond Gen4 requirements. However, Gen5 qualification depends on your full channel — board trace geometry, via stubs, and package parasitics all factor in. Run a channel-level SI simulation before committing to Gen5 deployment on this connector.
The side cutout is a mechanical feature of the connector body that improves tool access during SMT placement and inspection. It doesn't affect the land pattern or electrical performance — your PCB footprint stays the same as a standard 64-position PCIe SMT connector.
Yes. The cap protects the contact area from flux residue during reflow and is rated to 260°C, compatible with standard SAC305 profiles. Remove it before the first mating cycle.
Yes. FAI reports with dimensional measurements, plating thickness data, and electrical test results are provided for every new customer's first production lot at no additional charge.
Standard reels come in 500-piece and 1000-piece quantities. Custom reel counts are available for high-volume customers who need to match their feeder capacity or minimize changeover during production runs.
