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Catalogue

Rack Cabinet Dimensions

The size of a rack cabinet is a set of three key dimensions that determine what type and how many devices will fit inside. The most important and standardized dimension is the width. This is almost always 19 inches, which is approximately 48 centimeters. This standard ensures that most server and network components, such as servers, switches, routers, or patch panels from various manufacturers, will mechanically fit into the cabinet. The next dimension is height, which is not given in standard units but in special units called "U" or Rack Unit. One "U" unit represents a height of 44.45 millimeters. The height of the devices themselves is also specified in these units, so, for example, a 2U server will occupy two vertical slots in the cabinet. The total size of the cabinet, for example 42U, therefore means that it provides space for 42 1U-high devices or a combination thereof. The last dimension is depth, which varies from model to model and must be chosen according to the deepest device that will be installed in the cabinet. It is also necessary to account for clearance for cabling and proper airflow for cooling.

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