A memory socket is one of those components nobody talks about until it fails. When a data center rack goes offline because a DIMM connector developed intermittent contact after 15 thermal cycles, the cost per connector suddenly looks very different from the line-item price. That is the lens through which CONSHARE engineers its DDR5 RDIMM socket family: every material choice, every plating call, and every mechanical tolerance is evaluated against what it means at rack scale.

This page covers three build-to-order configurations of the CONSHARE DDR5 288-pin RDIMM connector. All three share the same JEDEC-compliant 0.85mm-pitch contact array and high-temperature thermoplastic housing. What separates them are the choices procurement engineers actually make: plating thickness, ejector mechanism, and board-level stack height.

Three Configurations, One Platform

Each variant in the CUR018R5 series starts from a common 288-position RDIMM socket baseline and diverges on the mechanical features that determine assembly compatibility and long-term contact reliability.

All three accept 1.27mm-thick DDR5 RDIMM modules per JEDEC MO-329, support PCB thicknesses from 1.57 mm to 3.18 mm, and are compatible with both reflow and wave soldering processes.

What the Connector Needs to Get Right at 6.4 GT/s

DDR5 pushes per-pin data rates to 6,400 MT/s and beyond. At those speeds, what used to be a simple mechanical interconnect becomes a transmission line. Three things matter disproportionately:

Contact normal force. Each of the 288 spring contacts must deliver consistent clamping force across the full operating temperature range of -55°C to +85°C. CONSHARE uses a copper alloy contact formulation selected specifically for minimal stress relaxation after repeated thermal cycling. The result is a per-pin current rating of 1.0 A and contact resistance held below 40 mΩ across the rated 25-cycle durability life.

Coplanarity across 288 solder tails. An SMT connector with this many leads demands tight coplanarity control. A single lifted lead creates an open circuit that is invisible to visual inspection. Every CONSHARE DDR5 socket ships with coplanarity verified to 0.10 mm across the full terminal array — a tolerance window that becomes progressively harder to hold as pin count scales.

Insertion loss at speed. The 0.85 mm contact pitch is fixed by the JEDEC standard; what the connector manufacturer controls is the dielectric material, contact geometry, and plating uniformity that determine signal degradation. The high-temperature nylon 6T/PA10T housing material used across the CUR018R5 series provides stable dielectric performance with minimal moisture absorption, which matters in the non-hermetic environments where most servers operate.

15μ" vs. 30μ" Gold: A Practical Selection Guide

The difference between Au 15μ" and Au 30μ" contact plating is not just twice the gold cost. Here is how to think about the trade-off:

Choose Au 15μ" (CUR018R511146, CUR018R521246) when:

• The DIMM is expected to remain seated for the life of the server (few mating cycles)

• The deployment environment is a climate-controlled data center with filtered air

• Cost-per-unit is the dominant procurement driver and the connector is not a field-replaceable item

Choose Au 30μ" (CUR018R521147) when:

• The application involves frequent DIMM swaps — test benches, validation labs, or upgrade-heavy fleets

• The operating environment includes higher humidity, temperature swing, or airborne contaminants

• The connector sits in a high-vibration chassis (edge computing, in-vehicle, industrial)

• The total cost of a field service call to reseat a DIMM exceeds the connector cost by orders of magnitude

The thicker gold layer delays the formation of nickel corrosion at pore sites. In practical terms, Au 30μ" roughly doubles the number of durable mating cycles before contact resistance begins to drift upward. For most data center deployments, 15μ" is adequate; for anything with plug cycles approaching the 25-cycle rating, 30μ" is cheap insurance.

Hardtray, Handletray, or Latch: Matching the Ejector to Your Line

The three CUR018R5 variants ship with different DIMM retention and ejection mechanisms, and the choice affects both assembly throughput and field serviceability.

Hardtray (CUR018R511146). The rigid tray-style ejector locks the DIMM into position with positive retention on both ends. It resists vibration-induced walk-out better than a simple latch and provides a clear tactile click on insertion. For high-volume manufacturing lines, the hardtray design also simplifies automated pick-and-place handling because the rigid structure protects the latch towers during tray-to-PCB transfer.

Smtdip Handletray (CUR018R521147). The handle-equipped tray variant adds a grip surface that makes manual DIMM extraction faster and reduces the risk of an operator slipping a tool and damaging adjacent components. If your end customers include IT staff who will be upgrading memory in the field, the handletray pays for itself the first time someone avoids a board-level repair.

Standard Latch, White (CUR018R521246). The traditional dual-latch design with a white latch body provides a clear visual contrast against the black housing — useful on densely populated server boards where DIMM slot identification under low light is a real-world ergonomic concern. The white latch also serves as a quick visual cue for slot type in mixed RDIMM/UDIMM deployments.

Manufacturing and Quality Assurance

All CUR018R5 connectors are assembled and inspected at CONSHARE's ISO 9001-certified facility. The production flow includes:

• 100% automated optical inspection (AOI) of solder tail coplanarity

• Contact normal force sampling per production lot using calibrated force gauges

• X-ray fluoroscopy (XRF) verification of gold plating thickness on every batch

• Thermal shock testing (-55°C to +85°C, 10 cycles) on AQL samples per IEC 60512

Standard packaging is vacuum-sealed tray with desiccant, rated for 12-month shelf life under MSL 3 storage conditions. Custom reel-and-tape packaging is available for high-volume automated placement lines — contact CONSHARE sales with your pick-and-place feeder specs.

Frequently Asked Questions

Are these connectors drop-in replacements for JEDEC SO-023 sockets?

Yes. The CUR018R5 series follows the JEDEC SO-023 socket outline and MO-329 module outline. Footprint compatibility has been verified against reference designs from major DDR5 memory controller vendors.

What is the minimum order quantity (MOQ)?

Standard MOQ is one full tray (typically 60–120 units depending on variant). Sample quantities of 5–10 units are available for design verification upon request.

Can you provide 3D CAD models for PCB layout?

Yes. STEP files for all three CUR018R5 variants are available. Request them through the technical support channel with your specific part number.

Do you offer custom latch colors or plating specifications beyond Au 15μ" and Au 30μ"?

Yes. Customization is a core part of CONSHARE's value proposition. Minimum order quantities apply for non-standard configurations. Contact engineering with your requirement.

What soldering profile is recommended?

Lead-free reflow per J-STD-020, with a peak reflow temperature of 260°C maximum. The high-temperature nylon housing is rated for lead-free reflow profiles without deformation.

Ordering Information

For volume pricing, lead times, or custom configuration requests, reach CONSHARE.

Product Documentation