How many mm is 42U? A 42U rack or cabinet can house equipment whose total height when placed into the rack is no more 73.5inches or 186.69cm (18.67m) with 1U=1.75inches or 44.45mm.
What is meant by 42U rack? A typical full size rack is 42U, which means it holds just over 6 feet (180 cm) of equipment, and a typical “half-height” rack is 18–22U, which is around 3 feet (91 cm) high.
What does 12U rack mean? For 12U, the “U” stands for the rack unit that is an EIA standard measuring unit for rack mount type equipment. 1U is equal to 1.75″ in height. A 12U wall cabinet means it would have 21″ internal usable space (12×1.75″).
What is 3U rack size? Size: The Dimention Of 3U DVR rack Length x Width x Height : 40cm x 40cm x 20cm. Before Order, it compare this size with your DVR/NVR etc and be sure that this rack is the perfect size for your device.