746789-1

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The 746789-1 is a type of D-Sub connector. It also goes by the name HD-20 connector. It falls within the HD subminiature-D product family and is configured for a 20-pin male connection. D-sub connectors are electrical connectors first developed by the Deltron corporation in the 1950s, though the range of products has expanded greatly since then.

The main application field of 746789-1 connectors is for providing internal power and/or signal connection between PC boards and devices such as computers, modems, printers, and so forth. It is popular due to its small size and is used in the majority of home and office PC systems. However, because of its small size, it is also used in other applications, such as professional audio and video equipment, medical instruments, and robotics.

The working principle of 746789-1 is simple yet effective. It consists of a low-resistance, high-conductivity contact which is connected to a pin. This contact is then inserted into a female socket which has been wired to the opposite side of the device requiring connection.

The connector is highly reliable due to its low contact resistance. The metal-to-metal contact area between the wires and the pins is large enough that there is no significant contact surface area, meaning that contact resistance is reduced. Furthermore, the contact is protected from damage by a plastic housing which provides additional strain relief.

The connector is relatively simple to use and install, which is an important factor for its popularity. The pins are pre-inserted into the female socket before wiring, thus simplifying the connection process. It is also small enough to be used in tight spaces which makes it ideal for applications where space is limited.

Overall, the 746789-1 D-Sub connector is a popular choice for a wide range of applications. Its small size, combined with its reliability and ease of use, means it is a cost-effective and efficient choice for connecting power and signals between different devices. It is also highly reliable due to its low contact resistance and housed design. Thus, it is an ideal connector for many applications which require connection between two electrical devices.

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