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Card Edge Connector
Industrial, IT Datacom
A 164-pin PCIe x16 slot is one of those parts that looks interchangeable until it is not. The BR1641X50XXXX is CONSHARE's traditional board-mount take on that slot: a black PA66 body with no side rib, no stand-off, and a large retention clip, 3.85 mm solder tails and gold-plated contacts. It is built for boards that need a dependable expansion slot for mainstream add-in cards — without paying for the shielded, high-speed construction that Gen 4/Gen 5 designs demand. This page walks through the specs the way they actually matter on your bench and on your production line.
What it is | Spec | What it means in practice |
|---|---|---|
Contact positions | 164 | Drops into a standard PCIe x16 footprint and works with any conventional x16 card |
Housing material | PA66, 30% glass fiber, UL-HB, black | Stiff enough to hold 164 pins in alignment through reflow, handling and thermal cycling |
Contact area plating | Gold | Keeps contact resistance low and stable through repeated card changes |
Solder tail plating | Tin, 80 µ" minimum | Wet-out quickly in wave, selective or hand soldering |
Contact resistance | 30 mΩ max | A small, predictable drop in the signal path; no surprises at the connector |
Current per contact | 1.1 A minimum | Comfortable for signal and light-power pins; this is not a power connector |
Insertion / withdrawal force | 1.15 N max / 0.15 N min per contact pair | A positive click when the card seats, with real grip left over for vibration |
Mating durability | 50 cycles | Realistic life for bench iterations, field service and test fixtures |
None of these numbers is remarkable on its own. What matters is that they hold up together across a production run. The gold contact finish is what keeps the 30 mΩ figure honest after the twentieth insertion; the glass-filled housing is what keeps all 164 pins on the same plane so the contact resistance stays uniform pin to pin. A connector that drifts out of one of these specs stops being a connector — it becomes a troubleshooting ticket. That is the case for buying the part from a manufacturer that tests for these things rather than just stamping them on a drawing.
Card retention is the most underrated spec on a PCIe slot. The large clip on this connector is sized to do more than hold the card in place during normal operation — it absorbs the forces that quietly kill solder joints: the jostle of a machine moving on a factory floor, the vibration of a system on a truck, the accidental bump of a bench unit being moved with a card installed.
The withdrawal force figure matters here. The minimum per contact pair is 0.15 N, which adds up across 164 contacts to a meaningful total that the clip has to resist while the card is seated. In practice, this means the card stays put unless someone deliberately releases the clip — which is exactly the behavior you want from an industrial or commercial build.
One practical note: a stronger clip means the card needs a slightly firmer push to seat fully. That is normal for this design and should not be mistaken for misalignment. If the card stops feeling right during insertion, check the alignment of the card edge with the slot opening first — never force it, because a cocked card will damage the contacts before it damages anything else.
Plating strategy is what separates a connector that ages well from one that degrades quietly. The BR1641X50XXXX uses gold on the contact area over a minimum 30 µ" nickel underplate, with tin on the solder tails. The nickel layer is the part that deserves more credit than it gets: it blocks the copper from migrating through to the surface, which is what keeps the contact interface clean in humid or mildly corrosive environments. The tin tails, in turn, are what give you fast, reliable solder wetting without relying on aggressive flux.
Electrically, the design targets 30 mΩ maximum contact resistance and 1.1 A per contact. For signal pins that is a very comfortable margin. The practical reading: treat the slot as a signal interconnect and route card power through the dedicated power edge, and this connector will stay inside its numbers for the life of the product. If you are planning to draw real current through the slot pins, this is the wrong part — that is a reminder worth having before layout, not after.
This is a traditional board-mount, so confirm the connector orientation matches your card layout and your soldering process (wave, selective, or hand). The 3.85 mm tail length is a conventional dimension that suits standard PCB thicknesses, but it is always worth a quick check against your board stack-up.
With no stand-off, the body sits low and close to the board. That is an advantage in slim enclosures, but confirm the board-side clearance under the connector for routing and for any components that need to pass beneath it.
Gold thickness drives both cost and wear life. If your product will see many insertions — test fixtures, serviceable systems — talk to CONSHARE about a thicker gold option before you lock the BOM. If the card is installed once, the standard finish is the right call.
If you are coming from a shielded Gen 4/Gen 5 slot, note that this connector is not a drop-in replacement in the signal sense: the footprint is a traditional PCIe 164-pin layout, but the electrical expectations are different. Match the connector to the link speed you actually run.
Motherboards and single-board computers where the expansion slot is standard equipment and the add-in card is a known, stable design.
Industrial PCs and edge computing boxes, where the large clip earns its keep against vibration and where service techs swap cards in the field.
Commercial and consumer builds that want a proven slot at a controlled BOM cost.
Development boards and test fixtures, where 50-cycle durability and solder-rework friendliness are real advantages.
Riser or adapter cards in chassis that mount cards parallel to the board — the low profile and compact body simplify the mechanicals.
Consistency is the actual product. CONSHARE runs incoming material inspection on the PA66 resin and copper alloy strip, monitors plating thickness during processing, and samples every production batch for contact resistance, insertion and withdrawal force, and coplanarity before the parts ship. The coplanarity check is the one that saves you reflow rework: it catches the slightly-high tail before it becomes a cold joint on your board.
Standard part numbers ship on short lead times, and evaluation quantities are available while you are still prototyping. Beyond the standard configuration, CONSHARE can discuss customized plating grades, alternative packaging, and part marking per project — useful when your BOM wants a specific finish or your line prefers a different tray layout.
No. The large clip and the summed withdrawal force of 164 contacts are meant to feel positive. As long as the card edge aligns with the slot opening, a firm push to full seat is the design working as intended.
Physically, yes — it is a standard 164-pin PCIe layout. But this is a traditional connector without the shield and grounding features built for Gen 4 link budgets. For lower-speed or short-run links it can work; verify with signal integrity testing on your actual layout before committing.
Trays protect the long 164-pin body and the clip from handling damage better than reel feeding, and they suit the typical order sizes for this part. Each tray holds 20 pieces, 20 trays per sheaf, 400 pieces per carton — easy to count, easy to store, easy to kit.
The connector is rated for 50 mating cycles, which covers repeated service. If your application will far exceed that, ask about the thicker gold option — wear life is plating-driven, and CONSHARE can match the finish to your insertion count.
