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Rectangular connectors provide electrical connection in communication systems, computer, printer, cell phone, instrumentation devices, modems, switches, or controllers, and are ideal for allowing multiple connections in a small space. The two most common rectangular connectors are Headers and male pins. This article will discuss the general application field and working principle of these two types of rectangular connectors.

Headers
Headers are simple but effective connector solutions, consisting of an insulating body mounted on a printed circuit board with pins or castellations. They are typically available in single, double or multiple row formats, and their dense packing allows them to occupy minimal space on both sides of the PCB. Headers offer reliable electrical connection for applications such as telecom and datacom signal routing, PCs, industrial instrumentation, automotive or consumer electronics.

The most common header design is the single row type with soldering pins. The header pins are formed and are soldered to the PCB before a mating device is mounted. This allows for the most secure and reliable electrical connection in many different applications. Depending on the application environment, headers may feature plated, gold plated, or nickel plated pins. The plating options provide dynamic connection capability and prevent corrosion.

The versatile design of headers allows them to be applied in a variety of configurations and settings, even in tough environments. They are available in a range of shapes and sizes, with either vertical or horizontal pin arrangements. Selection of the appropriate header depends upon the application environment and the related requirements.

Male Pins
Male pins are advanced connector solutions that feature a convenient one-piece design and are used to connect two circuits in a single operation. For most applications, the male pins are connected to a conductor on a printed circuit board. When the conductor is in place, the male pins should be firmly locked into the printed circuit board, and when removed, the pin should remain stationary. This ensures a complete and reliable connection.

Unlike other connectors, male pins are designed to remain in place during the entire operation, eliminating the need for any additional steps or tools. The durable design of the pins ensures that the pins will not slip or move during the mating and installation process. Male pins can be used in a variety of applications, including audio/video systems, communications systems, and industrial instrumentation.

Male pins are also popular in automotive applications, where a convenient electrical connection is needed. Automotive male pin connectors are designed to meet a specific standard, such as the ISO/TS16949:2009 standard, which is an industry standard for quality and performance of automotive parts.

To ensure compatibility with most common connectors, male pins are available in a range of lengths. Depending on the application, the length of the male pin may range from 0.25 inches to 2.5 inches.

Conclusion
Rectangular connectors are versatile one-piece connectors that are used in a wide variety of applications, from networks to automotive. Headers and male pins offer reliable electrical connection in the most demanding spaces and allow for multiple connections in a small space. By understanding the general application fields and working principles of rectangular connectors, device designers can select the most appropriate connector for their applications.

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