2.54mm Pitch Elevated 20mm Female Header Connector Dual Row Long Leg Stacking PCB Socket

Twenty millimetres of separation is more than a spacing decision; it is usually a thermal or mechanical one. A power board needs airflow across its heat sink, a transformer needs clearance beneath a control board, or a display needs room for its backlight inverter. This elevated 2.54mm dual row female header holds that gap with a 20mm moulded tower, so the distance is defined by the connector instead of by a set of brass standoffs that have to be ordered, placed and torqued separately.

At this height the tower carries real bending load during mating, so the body is ribbed in both directions and the contact tails are extended to 3.5mm to leave a full solder fillet on 1.6mm boards. Gold flash over nickel protects the contact interface, and the internal springs are unchanged from the standard dual row design so the mating side stays an ordinary male header. The part also acts as a mechanical datum, keeping both boards parallel without additional hardware.

• 20mm stacking height: A moulded tower fixes the board gap at 20mm and removes standoffs from the bill of materials.
• Two axis ribbing: Ribs in both directions resist the bending load that a tall tower takes during mating.
• 3.5mm solder legs: Extended tails leave a full fillet on 1.6mm boards and remain solderable from the underside.
• Mechanical datum: The tower keeps the two boards parallel, which simplifies assembly of tall stacks.
• Standard 2.54mm grid: Mates with ordinary dual row male headers, so the mating side needs no special part.
• Gold flash over nickel: Keeps contact resistance stable in the airflow environment these tall stacks usually create.

Tall stacking sockets are used where two boards must be separated for thermal or mechanical reasons. LED drivers lift their control board above a heat sink so convection can pass between the PCBs, power supplies separate a mains side board from a low voltage control board for creepage, and instrument designs raise a display board above a transformer. They also appear in industrial enclosures where a daughter card must clear a fan or a heatsink, and in modular equipment where boards are added in layers without changing the enclosure.

Body heights of 5.0, 8.5, 11.0, 15.0 and 20.0mm share one contact system, so changing the stack height does not change the PCB footprint. We can extend the tails to 4.5mm for thick backplanes, mould locating pegs for pick and place alignment, and add a polarising wall for single orientation mating. For volume programmes the insulator can move to PA9T for double sided reflow, and selective gold at 0.38 micron on the mating area only keeps cost under control on tall parts where plating area is significant.

Each connector is counted into anti-static shielding bags with a desiccant sachet and a humidity indicator card, then packed into export-grade corrugated cartons carrying the CNJWY neutral label. Inner foam inserts keep the contact field clear of the carton wall, and carton gross weight is held under 15 kg so that air freight handling limits are respected. Sea freight shipments are palletised, stretch wrapped and strapped against container humidity. Own-brand labels, barcoded cartons and drop tested inner boxes can be supplied for distributors, and every lot ships with a dimensional report, a plating thickness certificate and a RoHS declaration taken from the same production batch.