747190-4

D-Sub Connectors

The 747190-4 D-Sub Connectors (also called DE-9 connectors) are an electrical connector type used in a wide variety of applications. Usually made of metal (though plastic options are also available), the shape of these connectors is what gives it the “D-sub” name. Specifically, the shape of the connector resembles a D with its curved bottom, serving as a key feature which makes them distinct from other types of connectors. The “-9” in the title refers to the number of pins available for connection.

Application Field and Working Principle

Generally, D-Sub connectors are used in applications where space is limited and/or there is no need for a higher number of pins or higher voltage requirements. Examples of its common application include but not limited to computer systems, data communications, and control systems. These connectors are also often used in automotive, industrial, or medical instruments. D-Sub connectors are highly reliable in these kinds of applications due to the nature of their design, which allows for strong tensile as well as shock and vibration resistance.

The pins of a D-Sub connector are usually straight, but do have one slight taper that inclines toward the outer edges. This enables them to make electrical contact in a secure manner, providing both a physical and electrical connection to the mating device. The pins are usually inserted into a closely-machined hole in the connector, called a backplane, or contact piece. The contacts are then sealed by a low-maintenance, low-viscosity sealant that prevents any electrical short-circuiting. Additionally, each contact pin is surrounded by a metal sheath that adds to the connector’s durability by providing extra protection from outside elements.

The connectors themselves are made with the aim of being robust, versatile, and reliable. They are designed to tolerate a wide range of temperatures, with the plastic models being suitable for applications from -60°C to +125°C (-76°F to +257°F). They are also designed to be user-friendly, with the larger size making it easier to plug in and unplug. Depending on the cable type, D-Sub connectors can also feature latch mechanisms as well as a locking collar for extra security.

Conclusion

In conclusion, the 747190-4 D-Sub Connectors are an extremely advantageous type of electrical connector that is used in a wide range of applications due to their robust design, flexible connection possibilities, and reliable performance. In addition to providing excellent electrical contact, these connectors are also easy to use and require minimal maintenance. This makes them an ideal choice for a variety of needs and ensures that you can enjoy their top-notch performance for years to come.