PCIe Gen4.0 98-Pin Vertical SMT Connector with Ground Clip — 15µ" Gold, Tape & Reel

Design reviews change tone when the target moves to PCIe 4.0. The slot stops being a commodity part and becomes part of the signal path. This 98-position, 1.00mm-pitch vertical SMT connector from CONSHARE is built for that moment: a ground clip that engages ahead of the signal pins, a card latch that holds add-in cards in place, and 15µ" gold on the contact interface for a service life measured in years. It ships on tape & reel, ready for your placement line.

What changes when the bus runs at 16 GT/s

PCIe 4.0 doubles the signaling rate of Gen3 to 16 GT/s per lane, but the card edge stays exactly where it was — same 1.57mm thickness, same physical pattern. The connector doesn't get to change shape; it has to behave better. At these speeds, things that used to be cosmetic become electrical: contact resistance drift, uneven ground return, plating wear from repeated insertions.

The ground clip on this part exists for that reason. It gives card ground and board ground a short, consistent path between them, which keeps return current where the layout expects it and reduces radiated noise at the source. You see the result not as one big number but as margin — cleaner eye diagrams, fewer link retraining events, more headroom in the signal-integrity report.

Three design details you feel more than you see

Ground clip — the quiet partner

The clip wraps the mating interface so ground contacts touch before signal contacts do. That order defines the reference plane before data lines switch — precisely what a 16 GT/s receiver wants — and it keeps the radiating loop small and closed, which makes EMI compliance testing less painful.

Card latch — cards stay where you put them

Cards rattle in unlatched slots. The latch here locks the card edge after insertion and holds it through shock, vibration, and transport. For systems that ship in chassis or sit in racks next to spinning fans, that retention is a field-call avoidance feature dressed up as a piece of metal.

Vertical SMT — a slot that runs through reflow

Dual-row contacts on 1.00mm pitch match the standard x16 edge-card pattern. SMT tails let the slot ride the same pick-and-place and reflow line as the rest of the board — no press-fit tooling, no hand soldering, no separate wave step.

Numbers that translate to field behavior

A few ratings worth keeping in the spec sheet, and what each one means when the board is actually in the field:

Picking the right plating the first time

Gold thickness on the contact area is a durability decision, not a cost detail. This connector is offered from flash gold up to 30µ", and the version described here carries 15µ" gold on the contact interface, with 80µ" minimum tin on the solder tails and full nickel underplating underneath.

A quick rule of thumb from CONSHARE's applications team: flash gold suits single-assembly consumer boards; 3–5µ" covers mainstream commercial gear; 15µ" is where you land for servers, industrial controls, and anything with a real service life or a dusty site. If your board is assembled once and never touched, you can cost down. If cards get swapped in the field, 15µ" pays for itself in contact reliability — and it's what this SKU ships with.

Board-level notes from the CONSHARE design desk

Surface-mount connectors live or die at the solder joint. The tails on this part are held to 0.15mm maximum coplanarity — the discipline that keeps every tail in contact with its pad through reflow, so nobody chases cold joints with a rework iron later.

CONSHARE publishes a recommended PCB layout for this slot (component side, ±0.05mm tolerance) and the housing accepts the standard 1.57mm PCIe card. The body is LCP with 30% glass fill, UL94V-0, black — a material that holds its dimensions through lead-free reflow temperatures without warping the slot. One assembly detail worth repeating: it feeds straight into placement from tape & reel, so the line doesn't stop for hand-loading.

What CONSHARE checks before this part ships

CONSHARE is the manufacturer here, not a trader — the tooling, drawing, and inspection plan all live in-house. Every production lot is checked against the key inspection dimensions on the drawing, and materials are verified RoHS-compliant, with halogen-free and green-product (GP) options available. Samples ship before you commit a board revision, and because the factory controls the schedule, lead times on both samples and production runs run shorter than the typical distributor channel.

The housing on this SKU is logo-free for a clean look; if your program wants branding, logo printing is available on request. Other practical customizations: plating thickness stepped up or down across the A–G options above, housing color, and packaging changes from tape & reel to tray or tube. The latch and ground clip can also be reviewed against your specific card-retention requirements.

Where this slot earns its keep

The obvious homes are motherboards and riser boards for servers and edge computing, GPU and AI accelerator carriers, NVMe adapter and storage controller cards, and network interface cards. It also shows up in industrial PCs and test fixtures where cards go in and out constantly. Common thread: the board carries a PCIe 4.0 device, the chassis is expected to run for years, and the slot is not allowed to be the weak link.

Questions buyers actually ask

Q: Will a Gen4 slot accept Gen3 or older cards?

A: Yes. PCIe is backward compatible at the electrical level, and the physical pattern and 1.57mm card acceptance haven't changed across generations. Older cards seat and link normally, just at their own rates.

Q: What does the ground clip really change?

A: It gives ground a short, stable return path and engages before the signal pins. In practice that shows up as cleaner eye margins and lower radiated EMI — most visible in signal-integrity simulation and compliance testing at 16 GT/s.

Q: Is 15µ" gold necessary?

A: If boards are assembled once and never touched, flash gold is enough. If cards get swapped, or systems run in dusty or humid sites, or the product has a multi-year field life, thicker gold buys contact reliability that is cheap compared to a field failure.

Q: Can we get samples for layout validation?

A: Yes. CONSHARE provides samples together with the recommended PCB footprint, so the slot can be validated on a real board revision rather than on paper.

Ordering information

For PCIe 4.0 boards that need a slot you can stop worrying about — ground clip, latched retention, 15µ" gold, and a factory that backs it with in-house QC — this is the connector. Send CONSHARE your board design and quantity; samples and the PCB footprint are ready to go.

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