 |
| Quantity: | |
|---|---|
Card Edge Connector
Industrial, IT Datacom
When you're designing a motherboard or add-in card around the PCIe 4.0 Gen4 specification, the connector is not a passive part — it's a signal gatekeeper. CONSHARE engineered this 98-pin, x8-lane slot connector with a side notch architecture to solve a very specific problem that standard cutout slots leave unresolved: lateral card retention stability in enclosures where vibration, shock, or thermal cycling are present.
The 15µ" (0.38µm) gold flash on the contact beam area is chosen specifically for Gen4 signal paths. Thinner gold — like the 1µ" flash some suppliers push — wears through after as few as 10–15 insertion cycles, exposing nickel underneath and degrading differential pair impedance. The 15µ" specification on this part ensures stable contact resistance across the rated 50-cycle lifespan, which matters if your product goes through field-level RMA or card swapping.
The contact beams on this connector are formed from a copper alloy with a dual-zone plating strategy: nickel barrier (minimum 1.27µm) followed by selective gold on the contact zone, and tin on the solder tail. This isn't just a spec sheet detail — it directly affects your manufacturing yield. The tin-only solder tails wet cleanly in a standard lead-free reflow profile (260°C peak, 3–5 seconds), reducing tombstoning and cold solder joints on fine-pitch pads. Meanwhile, the gold-on-nickel contact zone eliminates the fretting corrosion that causes intermittent data errors in field-deployed systems.
The terminal retention force of ≥3.43N is worth highlighting. Many competing Gen4 connectors specify retention in the 2.0–2.5N range — adequate for lab testing, but marginal in automotive, industrial, or edge-server deployments where the system is shipped, bumped, and re-racked. CONSHARE's retention spec gives you headroom against mechanical shock without requiring additional card-securing brackets.
Design Challenge | Standard Slot Behavior | Side Notch Advantage |
|---|---|---|
Card insertion misalignment | Card can seat at an angle, stressing contacts | Notch guides card edge, ensuring parallel engagement |
Thermal expansion cycling | Card shifts laterally, causing contact wear | Notch constrains lateral movement |
Field-serviced systems | Repeated reseating degrades contact beams | Guided insertion reduces beam stress per cycle |
High-vibration environments | Card may walk out of slot over time | Notch provides positive mechanical location |
The side notch is not a cosmetic feature. In blade server chassis and industrial PC designs where cards are installed in the field by technicians who may not have a torque-controlled screwdriver, the notch compensates for insertion angle variance that would otherwise bend contact beams on the first install.
The 1.1A rated current per contact and 500V AC withstand voltage are specified with margin. What this means practically: if your add-in card draws significant power through the slot (common with GPU accelerators and NVMe expansion cards), this connector won't be the thermal bottleneck. The ≥1000MΩ insulation resistance ensures that even in humid environments — think tropical data centers or outdoor telecom cabinets — you won't see creepage-related leakage currents that trigger spurious link training failures.
Gen4 signaling runs at 16 GT/s. At that data rate, impedance discontinuities of even a few ohms can cause eye-pattern closure that drops your link to Gen3 speeds. The contact geometry on this connector is tuned for 85-ohm differential impedance, matching the PCIe CEM specification for Gen4.
The housing is high-temperature nylon rated UL94V-0, meaning it self-extinguishes in under 10 seconds with no flaming drips. This is non-negotiable for any product targeting UL/CE/FCC certification — a connector with a lesser flame rating will fail your safety submission, period.
Operating temperature range: -40°C to +105°C. If you're building equipment that sits in an unheated telecom shed in winter or inside a sealed enclosure near hot components, this range gives you real-world margin. Many connectors carry a -25°C lower bound — fine for consumer electronics, but risky for anything rated for outdoor or industrial deployment.
The connector is halogen-free and RoHS compliant, which matters if your product is sold in the EU market or to enterprise customers with green procurement policies.
Every production lot undergoes:
100% contact coplanarity inspection — warped contacts are the #1 cause of solder defects on connector reflow
Insertion/withdrawal force verification on a statistically valid sample per AQL 0.65
Salt spray testing (48-hour) on gold plating adhesion — we verify the nickel barrier is intact, not just present
Cross-section analysis on the first article of each new tooling setup
CONSHARE maintains tooling for all standard PCIe Gen4 pin counts (36/64/98/164), so your order enters production scheduling immediately — no 4–6 week tooling delay. Standard orders ship in 3–5 business days from PO confirmation.
Customization available:
Gold thickness: 15µ" (standard), 30µ" (extended cycle life), or 1µ" flash (cost-optimized)
Housing color: Black (standard), or custom-matched
Packaging: Tape & reel (standard for SMT), or tray packaging for manual placement
Tape & reel orientation: Per your pick-and-place machine specification
Non-soldering hole positions: Adjustable to your PCB layout
Designing a Gen4-capable motherboard or backplane that needs an x8 slot
Replacing a failing connector in a field-return where contact wear is the root cause
Building an industrial or telecom-grade system where vibration and temperature extremes are real
Specifying a connector for a product that will undergo UL/CE safety certification
You need an x1, x4, or x16 lane configuration (CONSHARE offers the same platform in 36/64/164-pin variants — contact us)
Your design requires press-fit (thru-hole) terminations rather than SMT — we have a separate product line for that
Your reflow profile peaks below 250°C — discuss alternative tin-plating chemistry with our engineering team
The contact geometry and impedance tuning are optimized for Gen4 (16 GT/s). Gen5 runs at 32 GT/s and requires tighter impedance tolerances and shorter stub lengths. While the connector may functionally carry a Gen5 signal in short-trace designs, we cannot guarantee signal-integrity compliance above Gen4. If you need Gen5, ask us about our dedicated Gen5 connector line.
0.15mm. This is a critical detail — if your EMS partner uses a standard 0.12mm stencil, you'll likely see insufficient solder on the SMT pads nearest the housing body, where gassing during reflow can create voids. We can provide a recommended aperture design on request.
Yes. The side notch is a mechanical feature on the connector itself, not a PCB requirement. However, the notch provides maximum benefit when your PCB also includes the corresponding relief cutout. We provide recommended PCB layout drawings including notch dimensions.
The connector is rated for 50 cycles. In practice, the 15µ" gold plating maintains stable contact resistance well beyond this, but the 50-cycle rating is what we guarantee per spec. If your application requires field-swappable cards with hundreds of cycles, consider upgrading to the 30µ" gold variant.
CONSHARE has been manufacturing PCIe connectors since the Gen2 era. We don't resell or rebrand — every connector is produced in our own facility under our own tooling, which means we can hold tolerances that generic suppliers cannot. When you have a signal-integrity issue on your production line, you're not talking to a distributor's Tier-1 support desk — you're talking to the engineers who designed the contact beam curve.
Contact CONSHARE today for samples, technical drawings, or to discuss your custom requirements. We ship evaluation samples within 48 hours.
