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Card Edge Connector
Industrial, IT Datacom
Most memory-socket failures do not show up in the design lab. They surface six months later, when a DIMM contact frets under thermal cycling or a latch cracks during a field upgrade. CONSHARE treats the 288-pin slot as a reliability anchor rather than a commodity. The two variants below—BR28817A1K4CR in Gold Flash and BR28817G1K4CR in 30 µin gold—let procurement and PE teams choose the right corrosion protection for the environment without re-spinning the PCB.
Not every board needs heavy gold. The two plating tiers are built around real duty cycles, not theoretical wish lists.
Feature | BR28817A1K4CR (G/F) | BR28817G1K4CR (Au30u'') |
|---|---|---|
Contact finish | Gold flash over nickel underplate | 30 µin gold over nickel underplate |
Best for | Clean, climate-controlled racks; short-lifecycle consumer gear | Industrial controls, edge nodes, outdoor cabinets, high-sulfur air |
Insertion cycles | 25 standard | 25 standard; extra margin for frequent service |
Relative cost | Lower | Moderate premium |
Solder area | Matte tin, 80 µin min | Matte tin, 80 µin min |
Both share the same copper-alloy fork contacts and PA66+30% glass-filled housing. If your program shifts from a server room to a factory floor, you can swap the socket finish without touching the board layout.
The 106.8 N maximum insertion force stays within the mechanical budget of standard 1.6 mm PCB stock. Fork-style contacts spread that load across the full 288-pin array, preventing the localized bowing that can crack nearby BGA packages.
The white ejector lever on the 293C blue housing gives a sharp tactile snap. On a busy line, assemblers can confirm seating by sound and color contrast—no magnification needed. The ejector is molded from the same glass-reinforced PA66 as the body, so it survives repeated actuation without the creep common in unreinforced nylon.
The housing and latch are rated for 260 °C for 10 seconds in the solder wave. That margin covers modern lead-free profiles without the warping or latch reset failures you see in lower-grade resins.
Standard DDR4 DIMMs rarely push the 0.75 A per-pin ceiling, but the headroom matters when the channel is loaded with high-density RDIMMs or LRDIMMs running aggressive power management at 1.2 V. Low-level contact resistance holds under 30 mΩ initially, with a post-stress delta limit of 15 mΩ. That tight window preserves signal-integrity budgets on long memory traces, especially in 1DPC or 2DPC server layouts.
Dielectric withstand is 500 V AC—well above DDR4 operating rails—so the socket is not the weak link if a power rail spikes during margin testing or hot-swap events.
The blue housing (293C) with white latch is not an aesthetic choice. In mixed-assembly environments, the color contrast lets QA quickly distinguish DDR4 slots from DDR3 or DDR5 positions on a crowded board. It also helps field technicians identify memory banks under poor lighting without reading silkscreen legends.
Parameter | Value |
|---|---|
Pin count | 288 |
Mounting | Through-hole, DIP 3.0 mm |
Housing / ejector | PA66 + 30% GF, UL-HB, color 293C blue / white latch |
Contact / fork | Copper alloy |
Current rating | 0.75 A per pin max |
Voltage rating | 12 V DC |
Impedance | 50 Ω min |
LLCR (initial / ΔR) | 30 mΩ / 15 mΩ max |
Insulation resistance | 500 MΩ min (DC 1 V) |
Dielectric withstanding | 500 V AC, no breakdown |
Insertion force | 106.8 N max |
Unmating force | 4.0 gf min per pin pair |
Durability | 25 cycles |
Wave solder | 260 ± 5 °C, 10 seconds |
RoHS | Compliant |
Every reel carries codes tied to plating-bath records and resin-batch data. If a field issue ever points back to the socket, we trace it to the raw-material lot in hours, not weeks.
Because we control the injection molds, latch geometry and housing shades can be adjusted without the 12-week NRE typical of franchised distributors. Need a different color for visual versioning or a taller body for conformal-coating clearance? We can accommodate.
Standard BR28817A1K4CR and BR28817G1K4CR ship from 4–6 weeks ARO. Blanket orders with monthly releases compress that to 2–3 weeks and lock pricing against gold and copper-alloy volatility.
Yes. Both part numbers share the same PCB outline, pin pitch, and 3.0 mm DIP solder tails. You can swap finishes mid-program without a layout change.
No. It is a functional color code. In mixed-DIMM environments, the blue body with white latch helps assembly and field teams instantly identify DDR4 banks without reading silkscreen legends.
The socket is qualified for 260 °C peak for 10 seconds in the wave. That covers most lead-free profiles. If your process runs hotter, contact us for a pre-production solder-heat evaluation.
The socket is rated for 25 cycles. For most server and industrial boards, that covers the entire product life, including initial burn-in and one or two field upgrades.
Yes. Because CONSHARE maintains the tooling in-house, we can adjust ejector color, latch geometry, or housing height with modest MOQ and lead-time adjustments.
