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High-Density PCB Connectors from China Suppliers | Reliable Printed Circuit Board Factory Solutions

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This product series features specialized connectors designed for high-density and reliable interconnections on printed circuit boards (PCBs) within electronic equipment. Engineered with a tonometer-style contact design—featuring a flat, blade-like or tuning-fork shape—these connectors ensure a compliant, wiping action when mated, resulting in a stable electrical interface. With a contact spacing (pitch) of 2.5mm, this series incorporates a hybrid layout: a central block of 31 or 37 contacts in a dual-row arrangement, complemented by additional contacts in a single-row configuration. This innovative design achieves an optimal balance of contact density and mechanical stability, making it ideal for board-to-board or board-to-wire applications in complex electronic assemblies. As a leading manufacturer based in China, we are proud to supply high-quality connectors to our clients, ensuring reliability and performance from our state-of-the-art factory.

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    Product Details

    Features and Advantages

    The core feature is the tonometer-style contact. This design offers significant advantages: the wiping action upon insertion cleans the contact surfaces, ensuring low and stable contact resistance, while the inherent springiness of the contact provides excellent normal force and reliable performance under vibration.

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    Low & Stable Contact Resistance

    Wiping action upon insertion continuously cleans contact surfaces for consistent electrical performance.

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    2.5mm Pitch Standard

    A proven standard balancing high density with sufficient electrical clearance for signal and moderate-power applications.

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    Hybrid Contact Arrangement

    Double lines for core contacts, single lines for others — optimizing both density and structural integrity of the connector housing.

    The 2.5mm pitch is a proven standard that offers a good compromise between high density and sufficient electrical clearance for many signal and moderate-power applications. The hybrid contact arrangement (double lines for core contacts, single lines for others) is an intelligent layout feature. Its primary advantage is that it concentrates a high number of contacts in a central, mechanically supported zone while using a simpler, space-efficient single-row design for peripheral lines, optimizing both density and structural integrity of the connector housing.

    Application

    These connectors are mainly used for the printed circuit connection of electronic equipment, serving as a critical backbone for internal system architecture. Their reliable, high-density design makes them suitable for:

    • Backplane / Daughterboard Connections Linking multiple PCBs in telecommunications switches, industrial computers, and data storage arrays.
    • Internal Module Interfacing Connecting power supply modules, processor boards, and I/O cards within a single chassis in medical imaging, test equipment, and defense electronics.
    • High-Pin-Count Cable-to-Board Interfaces Providing a reliable transition from internal ribbon or flex cables to the main PCB in aerospace avionics and sophisticated industrial controllers.

    Frequently Asked Questions

    Q1 What is the tonometer-style contact and why is it beneficial?
    The tonometer-style contact is a specialized contact design in which the wiping action during connector insertion actively cleans the mating surfaces. This results in low and stable contact resistance, superior normal force from the spring-like contact geometry, and reliable electrical performance even in high-vibration environments.
    Q2 Why is the 2.5mm pitch considered a proven standard for these connectors?
    The 2.5mm pitch strikes an optimal balance between contact density and electrical clearance. It allows a large number of signal and moderate-power connections to be made within a compact footprint without compromising insulation integrity, making it a widely adopted standard across industrial and telecommunications applications.
    Q3 What does the hybrid contact arrangement (double-line / single-line) mean?
    The hybrid arrangement uses double rows of contacts for the core (central) positions and single rows for peripheral positions. This concentrates a high pin count in the structurally supported center of the connector while keeping peripheral lines compact and space-efficient, resulting in an optimized balance of density and mechanical robustness.
    Q4 What industries and applications are these connectors best suited for?
    These connectors are well-suited for telecommunications switches, industrial computers, data storage arrays, medical imaging equipment, defense electronics, aerospace avionics, and sophisticated industrial control systems — anywhere reliable, high-density PCB-to-PCB or cable-to-board interconnection is required.
    Q5 Can these connectors handle both signal and power connections simultaneously?
    Yes. The 2.5mm pitch design supports both signal lines and moderate-power lines within the same connector body. The hybrid contact layout further allows dedicated zones for higher-current core contacts while maintaining signal integrity on peripheral contacts.
    Q6 How do these connectors perform in high-vibration environments?
    The inherent springiness of the tonometer-style contact generates consistent normal force against the mating surface. This ensures the electrical connection is maintained even under mechanical shock and continuous vibration, making these connectors a reliable choice for aerospace, defense, and industrial machinery applications.

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