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High-Density Printed Circuit Board Connectors - China Suppliers & Factory for Reliable Interconnections
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High-Density Printed Circuit Board Connectors - China Suppliers & Factory for Reliable Interconnections

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This specialized series of connectors is expertly designed for high-density and reliable printed circuit board (PCB) interconnections in electronic devices. Featuring a unique tonometer-style contact design—characterized by a flat, blade-like or tuning-fork shape—this connector ensures stable electrical interfaces through a compliant, wiping action during mating. With a contact spacing (pitch) of 2.5mm, the layout integrates a hybrid configuration: a central block of 31 or 37 contacts arranged in a dual-row format, complemented by additional single-row contacts. This design achieves an optimal balance of contact density and mechanical stability, making it particularly suitable for board-to-board and board-to-wire applications in complex electronic assemblies. Choose trusted suppliers and manufacturers in China for top-quality connectors from our factory, ensuring superior performance and reliability for all your electronic assembly needs.

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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.

    Low & Stable Contact Resistance Wiping action upon insertion cleans contact surfaces for consistent electrical performance.
    Vibration Reliability Inherent springiness delivers excellent normal force and stable contact under vibration conditions.
    2.5mm Pitch Standard Proven pitch offering an ideal balance between high density and sufficient electrical clearance.

    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

    Q What is a tonometer-style contact and why is it preferred in these connectors?
    A tonometer-style contact is a spring-loaded contact design that performs a wiping action when the connector is mated. This wiping cleans the contact surfaces during insertion, removing oxidation or debris, which results in consistently low and stable contact resistance. The built-in spring force also ensures reliable electrical continuity even under mechanical vibration.
    Q Why is a 2.5mm pitch used in these connectors?
    The 2.5mm pitch is an industry-proven standard that balances two competing needs: achieving high contact density on a PCB and maintaining sufficient electrical clearance between adjacent contacts. This makes it well-suited for both signal-level and moderate-power applications without sacrificing safety or performance.
    Q What is the purpose of the hybrid contact arrangement (double and single line rows)?
    The hybrid arrangement uses a double-row layout for core contacts in the center of the connector — where mechanical support is strongest — and a single-row layout for peripheral contacts. This design intelligently maximizes contact density in the most structurally stable zone while keeping the outer areas compact, improving the overall integrity and reliability of the connector housing.
    Q What industries and applications are these connectors designed for?
    These connectors are designed for a broad range of industries that demand high-reliability PCB interconnects, including telecommunications, industrial computing, data storage, medical imaging, defense electronics, aerospace avionics, and test & measurement equipment. They are used in backplane systems, internal module interfaces, and cable-to-board connections.
    Q Can these connectors be used for backplane and daughterboard connections?
    Yes. These connectors are well-suited for backplane and daughterboard applications. Their high-density, high-pin-count design enables reliable interconnection between multiple PCBs within a single chassis, making them a common choice for telecommunications switches, industrial computers, and large-scale data storage arrays.
    Q How do these connectors perform in high-vibration environments?
    The tonometer-style spring contact provides an inherent normal force that maintains consistent contact pressure between mated surfaces. This mechanical characteristic ensures stable electrical performance even when the connector is subjected to vibration, shock, or thermal cycling — making it appropriate for demanding environments such as aerospace avionics and defense electronics.

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