Overview
Double row pin headers are standardized electromechanical connectors consisting of two parallel rows of metal pins embedded in an insulating plastic housing. They serve as male counterparts to female socket connectors or direct PCB interconnects. These components are critical in electronics manufacturing due to their reliability and cost-effectiveness. They comply with industry standards like IEC 60664 for spacing and durability, ensuring compatibility across global supply chains.
Structure and Working Principle
The header's pins are typically made from brass or phosphor bronze, often gold- or tin-plated to enhance conductivity and resist oxidation. The housing material (e.g., nylon 6/6) provides insulation and mechanical support. During operation, pins establish electrical contact through spring tension in mating sockets or soldered PCB joints. The dual-row design increases connection density while maintaining mechanical stability, with common pitch configurations being 2.54mm (0.1") or 1.27mm for compact applications.
Key Features
Double row designs offer 50–100% higher connection density than single-row versions without compromising mechanical strength. Gold-plated variants achieve contact resistance below 20mΩ and withstand 500+ mating cycles. High-temperature housings (up to 260°C) enable wave soldering processes, while through-hole and SMT mounting options provide design flexibility. Some industrial-grade headers feature polarization keys or locking mechanisms for vibration-resistant applications.
Application Areas
Primary applications include motherboard power connections, industrial automation controllers, and automotive ECUs where vibration resistance is critical. They're also standard in Arduino/Raspberry Pi prototyping. In consumer electronics, these headers enable modular designs—for instance, connecting LCD panels to driver boards in TVs. Medical devices use them for disposable sensor interfaces due to their reliable mating performance.
Maintenance and Precautions
Periodically inspect for bent pins or housing cracks, especially in high-vibration environments. Deformed pins should be carefully straightened using needle-nose pliers to avoid breakage. When soldering, maintain 270–320°C iron temperature for 2–3 seconds per pin to prevent housing melting. For gold-plated versions, use no-clean flux to preserve surface conductivity. Store in anti-static packaging to prevent oxidation.
B2B Procurement Guide
Bulk purchases (1,000+ units) typically reduce costs by 15–30%. Request samples to verify plating thickness (≥0.76μm gold recommended for frequent mating) and housing UL94 V-0 flame rating. Lead times vary: standard 2.54mm pitch headers ship in 1–2 weeks, while custom configurations (e.g., odd pin counts) may require 4–6 weeks. For export, confirm RoHS/REACH compliance documentation.
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