What is a 3U rack? For electronic equipment racks (e.g., 19 or 23 inches wide), the term 1U is used to define one rack unit of height. To be precise, 1U equals 1.75-inches (44.45mm) of rack height. Therefore, a 2U rack mount height would be 2 x 1.75”, which equals 3.5-inches high. A 3U height would be 3 x 1.75” = 5.25-inches.
What does 4U mean rack? A 4U rack or cabinet can house equipment whose total height when placed into the rack is no more 7inches or 17.78cm (1.78m) with 1U=1.75inches or 44.45mm.
What is the size of 4U rack? 4U Rack, Size: 520(w)MM*400(d)*220(h)MM.
What does 4U mean in server? The “U” actually stands for the vertical measure of a server rack. Basically, a rack unit comprises the height of a server rack with a 19-inch or 23-inch height. Since a typical full-sized rack comes in at 4U, the 2U rack servers and 1U rack servers are considered half-rack servers.