High Density 40-Pin 2.54MM Dual Row Female Header Connector Gold Flash PA6T Data Bus PCB Through Hole

CNJWY presents its optimized High Density 40-Pin 2.54MM Dual Row Female Header Connector, purpose-engineered as the definitive solution for parallel data bus interfaces, microcontroller expansion ports, and multi-channel signal interconnection in embedded systems. The 40-position (2x20) configuration represents the sweet spot for many industry-standard interfaces, providing sufficient channel count for 8-bit and 16-bit parallel buses, SPI daisy-chain configurations, and multi-UART communication arrays while maintaining manageable PCB footprint and routing complexity. Each of the 40 phosphor bronze contacts features consistent gold flash plating for stable contact resistance, ensuring reliable data transmission across the full rated mating cycle lifetime. The PA6T high-temperature thermoplastic insulator withstands lead-free soldering processes and provides long-term dimensional stability. While the 40P configuration is highlighted, the complete product family spans 04P to 80P dual row configurations, with the 40P variant offering the optimal balance of signal density and design simplicity for embedded computing, industrial control, and communication system applications.

• 40-Pin Parallel Bus Optimization: The 2x20 dual row layout provides exactly 40 contacts, perfectly matching popular parallel interfaces including 8-bit data + 16-bit address buses, Raspberry Pi GPIO 40-pin headers, and FPGA development board expansion ports. The pin-to-pin spacing aligns with standard 0.1 inch prototyping grid layouts.
• Consistent Gold Flash Plating: All 40 contacts receive uniform gold flash plating thickness verified through XRF spectroscopy, ensuring consistent contact resistance below 20mΩ across every pin. This eliminates the signal skew and intermittent connection issues that can plague connectors with variable plating quality in parallel bus applications.
• PA6T High-Temperature Housing: The UL94V-0 rated PA6T insulator reinforced with 30% glass fiber maintains precise 2.54mm contact pitch tolerance through the complete lead-free reflow thermal profile, ensuring reliable mating with standard 40-pin male headers without alignment issues.
• Through-Hole Mechanical Integrity: Through-hole solder termination with 0.6mm diameter tails provides robust mechanical anchoring capable of withstanding repeated insertion and extraction cycles of mating 40-pin headers, which generate significantly more total extraction force than lower pin count connectors.
• Versatile Interface Compatibility: Beyond parallel data buses, the 40-pin configuration supports GPIO expansion headers, JTAG debugging interfaces (multiplexed), LCD parallel interfaces (up to 24-bit RGB), and multi-channel ADC/DAC interconnects, making it a universal connectivity solution across embedded platforms.
• Extended Family Scalability: The complete product series offers dual row configurations from 04P to 80P, enabling designers to standardize on a single connector family across an entire product portfolio, from simple 4-pin power headers to complex 80-pin high-density interconnects.

The 40-pin dual row female header connector is ubiquitous across embedded electronics development and production. Single-board computers including Raspberry Pi, BeagleBone, and Orange Pi platforms use 40-pin GPIO headers as their primary expansion interface, driving enormous demand for compatible female header sockets. Microcontroller development ecosystems including Arduino Mega, STM32 Nucleo, and ESP32 development boards employ 40-pin layouts for shield and daughterboard connectivity. FPGA and CPLD evaluation boards utilize 40-pin headers for logic analyzer connections, external memory interfaces, and high-speed I/O expansion. Industrial embedded controllers in PLC, CNC, and motion control systems leverage 40-pin connectors for modular I/O card interfaces. LCD and TFT display modules commonly use 40-pin parallel RGB interfaces for direct board-to-board connection. Medical device embedded controllers, laboratory automation equipment, environmental monitoring data loggers, and educational robotics platforms all employ 40-pin connectors for reliable modular interconnectivity.

CNJWY 40-pin and other high pin count female header connectors are packaged in anti-static protective tubes with foam end-plugs to prevent connector movement and contact damage during transit. Each tube holds 10-20 connectors depending on pin count, with intermediate spacers protecting contact alignment. For tape-and-reel customers, 40P connectors are available on 56mm wide carrier tape with 500 pieces per reel. All packaging materials meet ESD-safe requirements per ANSI/ESD S20.20 standards. Every production lot undergoes 100% pin alignment verification using precision gauges, contact resistance testing on all 40 positions, and insertion force measurement. CNJWY manufacturing operates under ISO9001:2015 certified quality management with full UL, SGS, ROHS, and REACH compliance. Custom polarized variants with missing pin positions for keyed mating, selective gold flash thicknesses, and application-specific insulator materials are available through our OEM engineering team. Standard delivery is 7-10 working days with minimum order quantity of 2,000 pieces.