1393590-4

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Backplane connectors are defined by MIL-STD-1553 as devices that provide "mechanical and electrical interfaces between dedicated electronic modules or between the aircraft/ground equipment and the airborne electronics," and 1393590-4 is one of the most popular. A 393590-4 backplane connector is composed of four sets of contacts that are equi-spaced at 90° intervals. This type of backplane connector typically has a Minimum Crossing Group of 2.0 square mm with either two or three-row options and a Width Index of 0.635, 0.790, or 0.830mm.

These backplane contacts are ideal for high-speed military applications and come in single-row or double-row configurations. When two-row configurations are used, the center row of contacts for the two-row version is twice as wide as the outer matches. The two-row configuration provides more contacts and a greater amount of current capacity.

The typical applications for these backplane connectors are in the military and aerospace, telecom, industrial and medical industries. Military applications may involve land vehicles, aircraft, rockets, satellites, and missiles. Aerospace applications may include aircraft control panels, fuel systems, navigation systems, and communication systems. Industrial applications may include test equipment, gas and oil exploration, and process control. For telecom applications, these backplane connectors are used in cellular base stations, wireless networks, and customer premises equipment. In the medical industry, these backplane connectors may be present in diagnostic and imaging equipment, lab instruments, and patient monitoring systems.

393590-4 backplane connectors feature a polyimide insulation system to protect against mechanical and thermal shock, as well as a variety of other environmental factors. The connectors are designed with high-frequency applications in mind and feature an optimized high-frequency and wide-band capability. To ensure reliable and safe operation, the contacts and the contacts alignment are designed to be extremely accurate. Durability is further enhanced thanks to the use of proven bend-to-fit technology.

The contacts of 1293590-4 backplane connectors are designed to meet rigorous electrical and environmental requirements. The contacts are rated to carry up to 300V, and the minimum resistance for a 30A circuit is 0.5 mohms. Additionally, these contacts come with a minimum carrying capacity of 20A and a maximum of 40A. The contacts are also designed to withstand various forces, such as shock, vibration, tension, and temperature extremes.

The working principle of 393590-4 backplane connectors is quite simple and reliable. When assembling, tight contact pressure between the male and female contacts ensures a strong connection. This ensures that all of the contacts are making good contact and that the current is flowing smoothly between them. The contacts are also designed with a twist-lock aka “bayonet” system that locks them in place, while the insulation ensures that the current does not leak or short circuit. This makes these backplane connectors a popular choice for a variety of applications that must provide reliable connections and power.

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