Guide to PCB-Only Connectors


Printed Circuit Boards (PCBs) serve as the backbone of electronic devices, providing connectivity between various components and enabling seamless functionality. Central to the successful integration of components on a PCB are the connectors. In this blog post, we will explore different categories of PCB-only connectors and their significance in ensuring secure and reliable connections.

PCB Connector Categories

  • Wire-to-Board Connectors: Commonly used in PCB designs to establish a secure connection between wires and the board itself. These connectors allow for efficient termination of wires onto the PCB, making them ideal for applications such as power supplies, control systems, and industrial automation.

  • Board-to-Board Connectors: Facilitate interconnections between multiple PCBs within an electronic system. They play a vital role in establishing reliable signal, power, and data transfer between PCBs, making them crucial for applications such as computer motherboards, consumer electronics, and automotive systems.

  • Flexible Flat Cable (FFC) and Flexible Printed Circuit (FPC) connectors: Designed for flexible circuit applications. These connectors provide a reliable and compact solution for connecting flexible circuits to PCBs, making them ideal for applications where space is limited, such as mobile devices, LCD screens, and portable electronics.

  • Terminal Blocks: Offers a convenient and secure method for connecting wires to a PCB. These connectors consist of screw or spring clamp terminals, enabling easy installation and maintenance. Terminal blocks are widely used in control panels, power distribution systems, and industrial machinery.

  • Header Connectors: Known as pin headers, are used to establish connections between PCBs and external devices or modules. They feature a series of pins that align with corresponding sockets or receptacles, allowing for easy and reliable plug-and-play functionality. Header connectors are commonly found in applications such as expansion cards, display modules, and data acquisition systems.

Importance of Locked Connectors

In addition to the various connector types mentioned above, it is crucial to consider the importance of locked connectors in PCB designs. Locked connectors provide an extra level of security by ensuring that the connection remains intact even in demanding environments or situations where vibrations or movement may occur. These connectors typically feature locking mechanisms such as latches or screws, which prevent accidental disconnection and enhance the overall reliability of the PCB assembly.

Locked connectors are particularly vital in applications that require high levels of stability and durability, such as automotive electronics, industrial machinery, and aerospace systems. By using locked connectors, engineers can mitigate the risk of intermittent connections, signal loss, or system failure due to accidental disconnections, thereby ensuring the continued operation and performance of the PCB-based electronic devices.


Choosing the right connector types for PCB designs is essential for establishing secure and reliable connections. Wire-to-board connectors, board-to-board connectors, FFC/FPC connectors, terminal blocks, and header connectors each serve specific purposes in enabling efficient signal, power, and data transmission. Additionally, locked connectors play a crucial role in ensuring the stability and integrity of connections, particularly in demanding applications. By carefully selecting and incorporating the appropriate connectors, engineers can optimize the performance and functionality of PCB-based electronic systems, enhancing overall reliability and user experience.