749721-7 Connectors, Interconnects

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D-Sub connectors are among the most popular types of electrical connectors in the world. They come in several different sizes and shapes, but all feature metal shells with pins and sockets. The 749721-7 connector is one of the larger varieties of D-Sub connectors. It is an inherently rugged, long-lasting connector designed for military applications.

The 749721-7 connector is composed of two parts—the shell and the contact. When mated, the contacts’ soldered pins are held securely by locking grooves located on the outside of the shell and not on the pins themselves. This extra layer of security is perfect for military environments where intense vibration and extreme temperatures are common. The contacts are machined from brass and plated with a nickel-based alloy, making them capable of handling up to 105°C.

The number of conductors supported by the 749721-7 connector ranges from 25 to 200, and the individual pins can range in size from 4mm to 6mm. The overall shell measures in at 65.5mm x 60mm and features a unique, integral keying system that prevents mismatching. The design also allows for the addition of a removable hood for dust and debris protection, making it a suitable choice for many outdoor and industrial applications.

The 749721-7 connector\'s working principle is simple. The basic operation of such a connector is as follows. When connected, the pins are inserted into the contact section of the shell. As the pins slide into the contact portion, they are held securely, in place by tight springs. Once properly connected, the pins and sockets provide a low resistance pathway for electricity to flow.

In addition to their durability and reliability, D-Sub connectors like the 749721-7 offer a few other advantages. One of these is the ability for multiple connectors and sizes to be joined together. This helps designers build smaller and more efficient devices without sacrificing performance. The connectors also feature a wide range of insert arrangements and contact arrangements, which gives engineers more flexibility in their designs. And of course, their small size makes them ideal for low-profile applications.

Overall, the 749721-7 connector is a highly regarded, military-grade connector that is versatile and reliable. It can handle a wide range of applications from military to industrial, and its built-in keying system ensures a secure connection. The added protection of a removable hood makes it ideal for outdoor and harsh environments, while the flexibility of both its insert and contact arrangements makes it ideal for any designer looking for a reliable and robust connection.

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