circular pin headers are commonly used connection components in electronic devices, widely applied in the connection between circuit boards and modules. Their main features include a sturdy and reliable design, facilitating the plugging and unplugging of modules, and are especially suitable for scenarios requiring multiple plugging and unplugging, modular design, and high stability of signal transmission.

1. Uses and Features of circular Pin Headers

• Module Sockets: circular pin headers often serve as sockets for modules, facilitating the insertion of other circuit boards or modules, such as in Arduino development boards or other controllers, for receiving sensor modules, display modules, etc.
• Electrical Connection Interface: circular pin headers are commonly used as electrical connection interfaces, forming a reliable electrical path when connected with pin headers, typically used for connections between multi-layer circuit boards or between power modules and control modules.
• Debugging and Testing Interface: In circuit design and debugging, round hole pin headers often serve as testing interfaces, making it convenient for developers to connect external debugging devices for signal testing.
• Functional Module Expansion Interface: Pin headers can provide functional module expansion interfaces for circuit boards, such as wireless communication modules, display modules, control modules, etc.
• Standardized Signal Interface: Pin headers are often used as standardized signal interfaces for connecting external devices like sensors, displays, button modules, etc., enabling quick connections and disconnections between different devices.
• Connection Stability: Pin headers have good connection stability, ensuring that the device maintains electrical connections even in the case of vibration or slight movement, widely used in devices requiring high-reliability connections.

2. Typical Application Scenarios for circular Pin Headers

• Embedded Development Boards: Such as Arduino, Raspberry Pi, ESP8266, etc., used for connecting sensor modules, communication modules, and other functional expansion modules.
• Multi-layer Circuit Board Connections: Used for connections between layers, forming a stable electrical connection channel, facilitating quick assembly and maintenance.
• Industrial Equipment and Control Systems: Used as interfaces for sensors and actuators, ensuring stable connection of modular sensor components and control parts.
• Testing Equipment and Experimental Platforms: Used for quick plugging and unplugging of modular sensors, switches, and other testing modules.
• Internal Module Connections in Consumer Electronics: Such as in mobile phones, tablets, computers, etc., used for connecting different circuit modules (like batteries, displays, motherboards, etc.).
• Smart Home and Internet of Things Devices: In smart home controllers, connecting various sensor and wireless modules, allowing devices to easily expand new sensor modules as needed.

3. Technical Specifications of circular Pin Headers

• Hole Diameter Specifications: The pins of round hole pin headers have a circular cross-section, with common specifications including 0.64mm, 1.00mm, 1.27mm, etc., suitable for industrial control, military equipment, and other occasions with high environmental requirements.
• Dual Row Pin Headers: With two rows of pins, the center distance between pins is commonly 2.54mm, suitable for high-density circuit board design, with common specifications including 2×3P, 2×5P, 2×10P, 2×20P, etc.
• Multi-Row Pin Headers: Used in highly integrated electronic devices, such as high-end computer motherboards, communication equipment, etc.
• Surface-Mount Pin Headers: Designed specifically for Surface-Mount Technology (SMT), with a very small center distance, common specifications include 1.27mm, 0.8mm, etc.

4. Market Situation of circular Pin Headers

The circular pin header industry has a stable growth trend globally, especially in the fields of embedded development, industrial control, and consumer electronics. The demand for round hole pin headers in the Chinese market continues to grow, and it is expected that the market size will further expand in the next few years. The competitive landscape analysis shows that the competition for round hole pin header products is fierce both domestically and internationally, with domestic enterprises enhancing their competitiveness through technological innovation and product upgrades.