The 2.54mm Ejector Header SMT is a surface-mount board-to-board connector with an ejection mechanism, featuring standard 2.54mm pitch spacing and specifically designed for electronic equipment requiring high-density installation and convenient maintenance. The "SMT" suffix indicates the product utilizes Surface Mount Technology, allowing direct installation on PCB surfaces through reflow soldering without requiring through-hole soldering. Composed of precision-molded housing, metal ejection mechanism and SMT terminals, this connector demonstrates unique value in space-constrained applications requiring frequent mating cycles.

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The connector housing typically employs high-temperature LCP (Liquid Crystal Polymer) or PBT material, capable of withstanding reflow soldering temperatures exceeding 260°C with a UL94 V-0 flame retardancy rating. The metal ejection mechanism uses specially heat-treated stainless steel, ensuring stable ejection performance for over 5,000 cycles. SMT terminals feature phosphor bronze substrate with gold plating (0.5-1.0μm) on contact surfaces and tin or tin-lead alloy plating on solder tails for optimal soldering performance. Premium models may incorporate dual-contact designs in the contact area to enhance signal transmission reliability.

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The 2.54mm Ejector Header SMT's primary advantage lies in combining SMT technology's high-density benefits with ejection mechanism convenience. Compared to traditional through-hole connectors, it saves PCB space and simplifies production processes while the ejection mechanism enables single-handed operation for improved maintenance efficiency. Its SMT terminals maintain coplanarity within 0.1mm to ensure reflow soldering yield, with special terminal designs providing 0.5-1.0N contact force for stable connections in vibrating environments. Its mating durability surpasses standard SMT connectors by 3-5 times.

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Manufacturers typically offer multiple customization services: pin counts ranging from 10 to 64 pins; adjustable ejection force (0.5-2.5kgf); optional housing colors (black/blue/natural); selective gold plating on solder tails; enhanced terminals (dual-contact design) or high-temperature versions (continuous operation at 150°C) for special applications. Terminal solder tail length can be adjusted (1.0-2.0mm range) for different PCB thicknesses. Military-grade products offer fully gold-plated terminals and reinforced ejection mechanisms.

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These connectors are primarily used in space-constrained electronic equipment requiring frequent maintenance: server memory module slots for high-density SMT installation and convenient servicing; modular backplane connections in industrial control equipment for vibration environments; pluggable modules in network communication devices for field upgrades; and detachable detection modules in medical equipment meeting sterilization requirements. They also find applications in aerospace electronics and automotive electronic control units, where their SMT design and ejection functionality perfectly address dual requirements for space efficiency and maintenance convenience.

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